Cold-rolled steel strip. Technical Terms of Delivery. voestalpine Stahl GmbH

Transcription

1 Cold-rolled steel strip Technical Terms of Delivery voestalpine Stahl GmbH

2 Contents Introduction 4 Mild steels for cold forming 5 Available dimensions 7 Mild steels with guaranteed minimum yield strength 10 Available dimensions 11 High-strength steels for cold forming 12 2 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Micro-alloyed steels 13 Phosphorus-alloyed steels 18 Bake-hardening steels 20 High-strength IF steels 23 Dual-phase steels 26 Complex-phase steels 31 TRIP steels 33 Surface 35 Surface type 35 Surface quality 35 Preservation 36 Available dimensions 37 Inspection and Testing 38 Material test certificates 38 Test unit 38

3 Processing information 39 Forming 39 Joining 39 Suitability to the application of surface coatings 39 3 Technical Terms of Delivery Cold-rolled steel strip 04/2012

4 Introduction These terms of delivery provide a general overview of the production possibilities in cold rolling mills. The large-scale investment program for the cold-rolling mill in the amount of 300 million euros was successfully completed over the past six years. The pickling-tandem link that went into operation in 1997 allows the tightest tolerances in thickness. Startup of the continuous annealing furnace in 1998 widens the spectrum of available product properties, weldability and paintability and considerably improves the corrosion protection of cold-rolled steel strip. The electron-beam texturing facility that went into operation in 1998 provides determinitic and pseudo-stochastic surface structures with the narrowest spreads of roughness values. These technologies make it possible for us to keep up with and make substantial contributions to market developments. These terms of delivery are based on the currently valid standards applicable in the European Union. It is our highest objective to give our steel grades the qualities that ensure cost-effective and optimal processing at our customers. To achieve this we employ the most economical manufacturing technologies. 4 Technical Terms of Delivery Cold-rolled steel strip 04/2012 The responsible technical department is prepared to review any requirements that go beyond the terms of delivery or conventional shapes. Your contact partners in the responsible sales segments or technical areas are available at any time to answer your inquiries. The following contains a general description of the available steel grades and their respective areas of application. All steel grades, with the exception of enameling steels, are generally available as uncoated cold-rolled wide strip as well as electrolytically galvanized steel strip or with corrosion protection primer on steel strip on one or both sides. Some dimensions may not be available based on specific plant limitations with respect to the respective steel grade. Please find the available dimensions for individual steel grades in our product configurator on the Internet at

5 Mild steels for cold forming Mild steels for cold forming make up the largest share of the market sector for cold-rolled flatproducts. These steel grades are divided into groups according to their cold-forming behavior and maximum yield stress. The steel grades standardized in the European Union are contained in EN 10130, Version 6, for uncoated cold-rolled strip. Mechanical properties Mild steels for cold forming Steel grade 6) 1) 2) 0.2% Yield point R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 3) A 80 [%] Vertical anisotropy r 4) 5) Work hardening exponent n (UE) 4) DC DC Technical Terms of Delivery Cold-rolled steel strip 04/2012 DC DC DC DC r m 2.1 r m 2.5 n m 0.22 n m ) The lower yield point R el applies if the yield point is pronounced. 2) Maximum values of roughly 20 MPa higher are permissible for the 0.2% yield point at thicknesses 0.5 < d 0.7 mm. Maximum values of roughly 40 MPa higher are permissible for the 0.2% yield point at thicknesses 0.5 mm. 3) Lower minimum values of roughly two units lower are permissible for the yield point at thicknesses 0.5 < d 0.7 mm. Lower minimum values by four units are permissible for the yield point at thicknesses 0.5mm. 4) Values for r 90 and n 90 as well as r m and n m are applicable only to product thicknesses of 0.5 mm. 5) Values for r and r m are minimized by 0.2 for thicknesses > 2 mm. 6) To the extent that no other agreements are made at the time of the order, grades DC01, DC03, DC04 and DC05 can be delivered as alloyed steels (with boron, titanium, etc.). The chemical composition complies with the standards defined in EN 10130/06. The mechanical properties apply to sample specimens and only for cold re-rolled condition.

6 Areas of application DC01: Applications in edging and simple drawing (such as for parts in the household appliance industry, barrels, radiators). DC03: Applications in edging and simple drawing (such as for parts in the household appliance industry, difficult radiators). DC04: Applications in simple internal and external automotive parts, more complicated parts in the household appliance industry (such as fronts with porthole doors). DC05: Applications in difficult interior and exterior automotive parts. DC06: Applications in most difficult automotive parts (such as oil pans, side panels, interior door parts). DC07: Applications in extremely complicated deep-drawn parts for fast-running, highly automated press lines. The values for mechanical properties apply to a time limit of six months for steel grades DC03, DC04, DC05, DC06 und DC07. Longer storage times for products of steel grade DC01 can lead to alterations in the mechanical properties, particularly to the limited possibility of proper cold forming behavior. 6 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Freedom of flow lines It is necessary to reroll the products in order to avoid the formation of flow lines after annealing. However, the tendency toward flow line formation can occur again some time after cold rolling, for which reason it is in the interest of the consumer to process the products as soon as possible. Products made of steel grades DC06 and DC07 have no flow lines. This holds true for cold re-rolled as well as for non-cold re-rolled products. The following maximum time periods apply for freedom of flow lines: p Six months after availability of products made of steel grades DC03, DC04 and DC05 of surface types A and B. p Three months after availability of products made of steel grades DC03, DC04 and DC05 of surface types A and B.

7 Available dimensions DC01, DC03, DC04, DC05 Available dimensions mild steels for cold forming Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

8 DC06 Available dimensions mild steels for cold forming Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

9 DC07 Available dimensions mild steels for cold forming Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

10 Mild steels with guaranteed minimum yield strength Steel grade HC220LC differs from the conventional mild steels for cold forming in its guaranteed minimum yield strength. A high level of consistency in the mechanical properties of this steel grade guarantees excellent processing and high productivity rates in automated processing lines. These steels are preferred for bending and profiling processes in the fitting, radiator, barrel, household appliance and furniture industries. Mechanical properties Mild steels for cold rolling with guaranteed minimum yield strength Steel grade 0.2% Yield point 1) R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation A 80 [%] Vertical anisotropy r 90 Work hardening exponent n (UE) HC220LC Technical Terms of Delivery Cold-rolled steel strip 04/2012 1) The lower yield point R el applies if the yield point is pronounced. The mechanical properties apply to sample specimens and only to cold-rolled condition. Chemical composition In mass % Steel grade C max. Mn max. P max. S max. HC220LC

11 Available dimensions HC220LC Available dimensions mild steels with guaranteed minimum yield strength Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

12 High-strength steels for cold forming The automotive industry in the past few years has experienced a strong increase in the application of high-strength steels for both interior parts and the exterior skin. In following this trend, voestalpine Stahl GmbH offers all the steel grades found in the market. New standards are being developed at a European level. These have been taken into account during the creation of the present Technical Terms of Delivery. Should you have any further requirements, we ask that you make a respective inquiry. The mechanical properties of dual-phase, complex-phase and TRIP steels apply for a period of three months. The properties of all other steel grades apply for up to six months from the time the products are made ready for delivery. Freedom of flow lines is guaranteed for a period of three months for all steel grades for which a bake-hardening effect has been guaranteed. A guarantee period of six months from the time the products are dispatched for delivery applies to all other steel grades, with the exception of micro-alloyed steels. European Standard entitled Determination of Yield Strength through the Effect of Heat (Bake- Hardening Effect) is currently being defined. 12 Technical Terms of Delivery Cold-rolled steel strip 04/2012 If the steel grades listed in the following sections do not fulfill customer requirements, please send a material inquiry. Some steel grades have already been introduced, however delivery cannot be made until the technical discussion has been completed and an inquiry made.

13 Micro-alloyed steels Cold-rolled flat products of the HCnnnLA series are micro-alloyed fine-grain steels with special cold-forming properties. This material group covers the upper hardness range of the conventional high-strength cold-rolled thin strip, beginning with the guaranteed minimum yield strength from 260 MPa up to and including 500 MPa. The high-strength properties of this group of steel grades are adjusted by means of micro-alloying Nb and Ti individually or in combination. Mechanical properties Micro-alloyed steels Steel grade Designation of standard EN ) 2) 0.2% Yield point R p 0.2 [MPa] Tensile strength 2) R m [MPa] 2) 3) Fracture elongation A 80 [%] HC260LA HC260LA HC300LA HC300LA HC340LA HC340LA HC380LA HC380LA Technical Terms of Delivery Cold-rolled steel strip 04/2012 HC420LA HC420LA HC460LA HC500LA ) The lower yield point R el applies if the yield point is pronounced. 2) When stipulated in the order, a lower yield strength (by 20 MPa), a lower tensile strength (by 10 MPa) and a 1% higher fracture elongation value apply to longitudinal samples. 3) Lower minimum values of roughly 2% are permissible for fracture elongation at thicknesses of 0.5 < d 0.7 mm. The mechanical properties apply to transverse test samples. The chemical composition of this group of steel grades complies with the standards defined in EN This group of steel grades is already very prevalent in the automotive industry. Their application is found mainly in the area of crash-relevant structural components.

14 Available dimensions HC260LA, HC300LA, HC340LA Available dimensions micro-alloyed steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

15 HC380LA, HC420LA Available dimensions micro-alloyed steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

16 HC460LA Available dimensions micro-alloyed steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

17 HC500LA Available dimensions micro-alloyed steels Available dimensions upon request. 17 Technical Terms of Delivery Cold-rolled steel strip 04/2012

18 Phosphorus-alloyed steels Cold-rolled flat products of the HCnnnP series differ from the conventional mild steels for cold forming in their guaranteed minimum yield strength. The increased strength properties are adjusted by fine grains and solid-solution hardening, for which phosphorus is excellently suited. This series of steel grades covers the yield strength range between drawing and deep-drawing grades on the one hand and the micro-alloyed cold-forming steels (HCnnnLA) on the other. Mechanical properties Phosphorus-alloyed steels (EN 10268) Steel grade 0.2% Yield point 1) R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 2) A 80 [%] Vertical anisotropy r 90 3) Work hardening exponent n (UE) HC220P HC260P HC300P Technical Terms of Delivery Cold-rolled steel strip 04/2012 1) The lower yield point R el applies if the yield point is pronounced. 2) Lower minimum values of roughly 2% are permissible for fracture elongation at thicknesses of 0.5 < d 0.7 mm. 3) Lower values by 0.2 units are permissible for the r value for thicknesses > 2 mm. The mechanical properties apply to transverse test samples. The chemical composition of this group of steel grades corresponds to the defaults in EN (see comparison of standards in the Appendix). This group of steel grades is applied predominantly where higher stiffness of the material sustainably improves the processing and properties of use (such as in shelf and rack construction or exterior parts in the household appliance industry). These steels are also suitable in the lower yield strength range (HC220P) for less complex large-surface exterior shells in the automotive industry as well as for structural components with less forming stress.

19 Available dimensions HC220P, HC260P, HC300P Available dimensions phosphorus-alloyed steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

20 Bake-hardening steels This group of steel grades has gained much more significance during the past few years in the automotive industry in interior as well as exterior components. HCnnnB steels are characterized by their excellent ductility and the advantage of the additionally increased yield strength based on the bakehardening effect. This results in a large range of applications in car bodies. While the higher classes of yield strength (HC260B, HC300B) are primarily intended for interior components, the HC180B and HC220B steel grades are especially suited to exterior car body components because the bake-hardening effect in these steels when compared to mild steels yields significantly improved dent resistance. Dent stiffness (increased E module) can also be increased. Mechanical properties Bake-hardening steels (EN 10268) Steel grade 0.2% Yield point 1) R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 2) A 80 [%] Vertical anisotropy r 90 Work hardening exponent n (UE) Bake-hardening value BH 2 [MPa] HC180B Technical Terms of Delivery Cold-rolled steel strip 04/2012 HC220B HC260B HC300B ) The lower yield point R el applies if the yield point is pronounced. 2) Lower minimum values of roughly 2% are permissible for fracture elongation at thicknesses of 0.5 < d 0.7 mm. The mechanical properties apply to transverse test samples. The chemical composition corresponds to the defaults set forth in EN

21 Available dimensions HC180B, HC220B Available dimensions bake-hardening steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

22 HC260B, HC300B Available dimensions bake-hardening steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

23 High-strength IF steels Higher-strength interstitial-free steels are based on basic vacuum-decarburized IF analysis stabilized with Ti and/or Nb and used to determine the desired hardness ranges with P and Mn. This basic IF analysis lends this group of steel grades higher values of vertical anisotropy (r value) when compared to other steel grades. The anisotropy value is important for deep-drawing strain. Particularly the high r values in diagonal direction lead to a certain degree of isotropic behavior during forming. The main area of application for high-strength interstitial-free steels is found in formed automotive components, such as in the interior wheel arch, longitudinal supports that are difficult to form or in bottom plates in the tunnel. The manufacturing route in the continuous annealing line in connection with the excellent forming properties also predestines this steel grade for exterior skin applications such as doors, hatches and roofs. Mechanical properties High-strength IF steels (EN 10268) Steel grade 0.2% Yield point R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 1) A 80 [%] Vertical anisotropy r 90 Work hardening exponent n (UE) 23 Technical Terms of Delivery Cold-rolled steel strip 04/2012 HC180Y HC220Y HC260Y ) Lower minimum values of roughly 2% are permissible for fracture elongation at thicknesses of 0.5 < d 0.7 mm. The mechanical properties apply to transverse test samples. The chemical composition corresponds to the defaults set forth in EN

24 Available dimensions HC180Y Available dimensions higher-strength IF steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

25 HC220Y, HC260Y Available dimensions higher-strength IF steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

26 Dual-phase steels Dual-phase steels consist of a multi-phase base material microstructure of which the main components are ferrite (80 90%) and martensite (10 20%). Other phases may be included in smaller amounts. The special characteristic of dual-phase steels is that particularly low yield ultimate ratios can be obtained with high ultimate tensile strengths. Compared to micro-alloyed steels of the same ultimate tensile strength, this series of steel grades demonstrates substantially higher fracture elongations and hardening exponents. Because of the pronounced offset strain hardening, particularly at the beginning of forming, dual-phase steels are especially predestined for forming stress in the stretch forming area. An additional positive characteristic is the achievable bake-hardening effect, which leads to an additional increase in the yield strength after forming during paint baking. This series of steel grades is currently available in five classes of tensile strength, from 450 MPa to 980 MPa. Based on the characteristic property profile of dual-phase steels, this series of steel grades is especially suited to crash-relevant structural parts such as side beams, crossmembers and supports for A, B or C pillars. Dual-phase steels have special potential in their significant contribution to weight reduction and increased passive safety in automotive structures. 26 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Mechanical properties Dual-phase steels (pren 10338) Steel grade Reference grade pren % Yield point R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 1) A 80 [%] Work hardening exponent n (UE) Bake-hardening value BH 2 [MPa] HCT450X HCT450X HCT500X HCT500X HCT600X HCT600X HCT780X HCT780X HCT980X 2) HCT980X ) Lower minimum fracture elongation values by two percent are permissible for thicknesses of 0.7 mm. 2) Available dimensions upon request. The mechanical properties apply to transverse test samples. The chemical composition corresponds to the defaults set forth in pren

27 Available dimensions HCT450X Available dimensions dual-phase steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

28 HCT500X Available dimensions dual-phase steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

29 HCT600X Available dimensions dual-phase steels Ordered strip thickness (mm) Technical Terms of Delivery Cold-rolled steel strip 04/ Ordered strip width (mm) The graphics refer to thickness values with symmetrical thickness tolerances. The maximum width is reduced by 20 mm if the width tolerance is limited or if the edge is cut. Please contact our sales departments for widths below 900 mm (production scheduling for center slitting and longitudinal slitting lines).

30 HCT780X, HCT980X Available dimensions dual-phase steels Available dimensions upon request. 30 Technical Terms of Delivery Cold-rolled steel strip 04/2012

31 Complex-phase steels The availability of the complex-phase steel series is seen as an addition to the dual-phase steel series. These are steel grades with a minimum tensile strength ranging from 780 to 980 MPa. The complex-phase steels are multi-phase steels whose microstructure is characterized by the fact that the hard martensite particles are distributed in a soft ferrite matrix. Bainite phases can also occur in addition to the martensite. When compared with the dual-phase steels, the complex-phase steels have a higher yield strength at the same tensile strength and thus a higher tensile strength ratio. The guaranteed fracture elongation values are lower than those of dual-phase steels. The complex-phase steels and the dual-phase steels demonstrate, though to a small degree, pronounced work-hardening behavior. The bake-hardening effect remains as it does in dual-phase steels. Structural parts with lower forming stress show higher yield strengths in this series of steel grades as compared to the dual-phase steels. This can be compensated through a simpler component design aimed at increasing strength resulting from stronger deformation. For this reason, complex-phase steels are preferred for high-strength special sections and safety-related structural components with lower forming stresses. 31 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Mechanical properties Complex-phase steels (pren 10338) Steel grade Reference grade pren % Yield point R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation 1) A 80 [%] Bake-hardening value BH 2 [MPa] HCT780C HCT780C HCT980C HCT980C ) Lower minimum fracture elongation values by two percent are permissible for thicknesses of 0.7 mm. The mechanical properties apply to transverse test samples. The chemical composition corresponds to the defaults set forth in pren

32 Available dimensions HCT780C, HCT980C Available dimensions complex-phase steels Available dimensions upon request. 32 Technical Terms of Delivery Cold-rolled steel strip 04/2012

33 TRIP steels TRIP (transformation-induced plasticity) steels are comprised of a ferritic matrix (roughly 75%), bainite (approximately 10%) and metastable residual austenite (up to 15%). The portion of the hard phase (bainite) as well as the stability of the austenite during forming influence the spectrum of the mechanical-technological values. Transformation-induced plasticity means that the metastable soft austenite is partially transformed into hard martensite during plastic forming (deep drawing). This makes local constriction difficult and increases the values for uniform elongation. This is the basis for the well-known excellent formability of TRIP steels with high initial tensile strength. The increased bake-hardening effect achieved by temperature treatment additionally increases the potential weight savings. This series of steel grades is available in three classes with minimum tensile strengths of 600 MPa, 690 MPa and 780 MPa. TRIP steels are particularly suited to crash-relevant applications or safety parts with increased forming stress in the manufacturing process. 33 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Mechanical properties TRIP steels (pren 10338) Steel grade Reference grade pren % Yield point R p 0.2 [MPa] Tensile strength R m [MPa] Fracture elongation A 80 [%] Work hardening exponent n (UE) [MPa] Bake-hardening value BH 2 [MPa] HCT600T HCT600T HCT690T HCT690T HCT780T HCT780T The mechanical properties apply to transverse test samples. The chemical composition corresponds to the defaults set forth in pren

34 Available dimensions HCT600T, HCT690T, HCT780T Available dimensions TRIP steels Available dimensions upon request. 34 Technical Terms of Delivery Cold-rolled steel strip 04/2012

35 Surface Surface type The products are delivered with one of the two surface types: A or B. Surface type A All defects are permissible such as pores, small scratches, small nipples, shallow grooves and slight discoloration, as long as these do not hinder the suitability of the material with respect to forming and adhesion of surface coatings. Surface type B The better side must be free of defects to such a degree that the uniform appearance of a quality paint coat or electrolytically applied coating is not negatively impacted. The other side of the material must at least meet the requirements of Surface Type A. If not otherwise agreed, the better side of the material is located on the top side of the sheet or the outer side of the strip. 35 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Surface quality The surface quality can be rough, mat or smooth. Products are delivered in mat quality if not otherwise specified in the order. The median roughness values in the following table correspond to the three surface qualities above: Surface quality Surface quality Median roughness value Ra (µm) Smooth 0.9 Mat Rough > 1.6 Determination of the median roughness value Ra is subject to a wavelength limit of 2.5 mm in accordance with EN 10049, version 2005 (standard measuring length of 12.5 mm). Other median roughness value margins for special applications must be specified in the order.

36 Preservation As a rule, oiling is performed using an anticorrosive oil which can be removed with alkaline or other conventional cleaning agents. Depending on the stress during treatment, one of the following types of oil is applied: p Slightly oiled roughly 0.7 g/m 2 per side p Oiled roughly 1.2 g/m 2 per side p Heavily oiled roughly 1.6 g/m 2 per side Should no other data be provided at the time of the order, 1.2 g/m 2 will be applied per side. Although the oil is distributed evenly, a certain degree of oil flow across the length and width of the strip is unavoidable during transportation and storage. Other oil applications ranging between 0.5 and 2.0 g/m 2 per side are specified in the order. No liability is assumed for corrosive damage of material that is delivered in unoiled condition. 36 Technical Terms of Delivery Cold-rolled steel strip 04/2012

37 Available dimensions Cold-rolled strip in coils Thickness 1) [mm] Width [mm] Maximum outer diameter [mm] Inner diameter roughly [mm] Coil weight [t] max / > 785 2) < 900 2) / ) / ) Inner diameter of roughly 500 mm only up to < 2.50 mm (for thicknesses 2.50 mm only upon request). 2) Width range between > 785 and < 900 mm only upon request. 3) With limited width tolerance of 1,580 mm max. 37 Technical Terms of Delivery Cold-rolled steel strip 04/2012

38 Inspection and Testing Material test certificates A test certificate as set forth in EN is subject to specification in the order. Test unit Specific tests are restricted to a test unit of 20 tons or a portion of 20 tons of the same rolling unit. In the case of strip, a coil of more than 20 t is considered to be a test unit. Tests are subject to the standards set forth in EN Technical Terms of Delivery Cold-rolled steel strip 04/2012

39 Processing information Forming The selection of materials depends on the demands on strength and formability as well as the component-specific requirements. Steels in the higher strength range exhibit more pronounced elastic recovery after forming. Joining All conventional thermal and mechanical joining technologies as well as adhesive technologies can be used as methods of connecting. All steels are especially suitable for welding in accordance with conventional industrial welding technologies. Slight shifts in the optimum welding range can occur during resistance spot welding as a result of the chemical composition of the various steels. The electrode clamping forces must be adapted to the respective strengths. Intended gas-fusion welding must be indicated in the order. 39 Technical Terms of Delivery Cold-rolled steel strip 04/2012 Suitability to the application of surface coatings All products are suited to surface coating. Materials are to be pretreated by the processing company. The intention of metallic coating on metal sheet must be specially indicated in the order.

40 Technically more advanced. Successful together. voestalpine Steel Division the partner you can trust. High-quality materials are the basis for our products. We strive to be the best partner for our customers and want to provide them with the best-possible solution. We focus our expertise on two aspects: The personal aspect, with dedicated and highly competent employees The technical aspect, with high-quality methods, products and services. The companies in the voestalpine Steel Division and their employees understand partnership to be the following: Understanding for their customers business Expertise and reliability Responsibility for satisfactory project completion Partnerships based on trust Many years of successful partnerships with our customers prove our point. voestalpine Stahl GmbH voestalpine-straße Linz, Austria T. +43/50304/ F. +43/50304/ marketing_stahl@voestalpine.com