AISI-SAE CLASSIFICATIONS OF STEELS. Base Metals Code Designations and Filler Metal Classifications as per AISI, SAE, ASME and CSA

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1 AISISAE CLASSIFICATIONS OF STEELS Base Metals Code Designations and Filler Metal Classifications as per AISI, SAE, ASME and CSA AISI SAE ASME CSA American Iron and Steel Institute Society of Automotive Engineers American Society of Mechanical Engineers Canadian Standards Association AISISAE Classification of Steels Classifications Carbon steels Carbon steels, resulfurized Carbon steels, resulfurized and rephosphorized Manganese steels Nickel steels Nickel steels.50% Ni Nickel steels 5.0% Ni Nickel chromium steels NiCr steels 0.7% Ni, 0.7% Cr NiCr steels.5% Ni, 0.6% Cr NiCr steels.75% Ni,.0% Cr NiCr steels.50% Ni,.50% Cr Carbonmolybdenum steels Chromiummolybdenum steels Chromiumnickelmolybdenum steels Nickelmoly steels.65% Ni, 0.5% Mo Nickelmoly steels.5% Ni, 0.5% Mo Low chromium steels Medium chromium steels Carbonchromium steels Chromiumvandium steels Low NiCrMoly steels 0.% Mo Low NiCrMoly steels, 0.5% Mo SiliconManganese Spring steels SiliconManganeseCr Spring steels Specifications 0XX XX XX XX XX XXX XX 5XX XXX 0XX XX XX XX 40XX 4XX 4XX 46XX 48XX 50XX 5XX 5XX 6X 86XX 87XX 9X 9XX Note: First figure indicates the major class of steel. Second figure indicates a subdivision of the major class And the percentage of t he major alloying elements. This is true of many of the alloy steels. The third and Fourth figures are most important for welding because they indicate carbon in hundredths of a percent. Reprinted with permission from AISI. E

2 AISISAE Standard carbon steels FreeMachining Grades AISI Composition *, % No. C Mn P S SAE No. Resulfurized to to to to to to to to to to to to to to to to to to.0.0 to.60.0 to.0.5 to.65.5 to.65.5 to to.00.5 to.65.5 to to to to.00 max max max max max max max max max max max max max max max max 0.6 to to to to to L max 0. max 0. max 0.09 max 0.5 max Resulfurized and rephosphorized 0.60 to to to to to.5 Copper can be added to a standard steel to to to to to to to to to to L4 0.5 to 0.5%Pb. When lead is required as an added element to a standard steel, a range of 0.5 to 0.5%, inclusive, is generally used. Such a steel is identified by inserting the letter L between the second and third numeral of the AISI number. Sources: American Iron & Steel Institute, New York; SAE Standard J40f. Reprinted with permission. E9

3 AISISAE Standard carbon Steels Nonresulfurized Grades AISI Composition *,% No. C Mn P Max max 0.5 max max 0.5 to max 0.0 to to to to to to to to to to to to to to to to to to 0..0 to to to to to to to to to to to to to to to to to to to to to to to to 0.9. to to to to to to to to to to to to 07. to to to to to to to to to to to to to to to to to to to to to to to to to to to to to 0.90 S Max SAE No * Copper can be added to a standard steel to 0.5% Pb. When lead is required as an added element to a standard steel a range of 0.5 to 0.5%, inclusive, is generally used. Such a steel is identified by inserting the letter L between the second and third numeral of the AISI number. Souces: American Iron & Steel Institute, New York; SAE Standard J40f Reprinted with permission. E

4 SAE Alloy Steel Compositions SAE Composition * % No. C Mn P S Si Ni Cr Other Corres ponding AISI No E Mo E * Small quantities of certain elements are present which are not specified or required. Considered as incidental, they are acceptable to the following amounts: 0.5 Cu, 0.5 Ni, 0. Cr and 0.06 Mo. ++ Electric furnace steel. Source: NORME SAE J404g E

5 CSA Standard G40.M Structural Quality Steels Chemical Composition Heat Analysis Plates, Bars, Spapes and Sheet Piling Grade C Mn P S Si (a) (b) Grain Refining Elements ( c) Cr Ni Cu (d) Usual Deoxid ation Grain Size 0G 0.6 max. max (e) 0.05 max 0.05 max 0.40 max 0.0 max 50G 0.8 max (f).65 max 0.04 max 0.05 max 0.40 max 0.0 max 400G 0.8 max (f).65 max 0.04 max 0.05 max 0.40 max 0.0 max 60W 0. max max 0.05 max 0.40 max 0.0 max 00W 0. max max 0.05 max 0.40 max 0.0 max 50W 0. max max 0.05 max 0.40 max 0.0 max 80W 0. max max 0.05 max 0.40 max 0.0 max 400W 0. max max 0.05 max 0.40 max 0.0 max 480W 0.6 max max 0.05 max 0.40 max 0.0 max Semikilled Semikilled Semikilled Semikilled Semi Killed Semi Killed Semi Killed Semi Killed Semi Killed 60WT 0. max max 0.04 max max Killed 00WT 0. max max 0.04 max max Killed 50WT 0. max (h) 0.0 max 0.04 max max (i) Killed 400WT 0. max (h) 0.0 max 0.04 max max (i) Killed 480Wt 0.6 max (h) 0.0 max 0.04 max max (i) Killed 50R 0.6 max 0.75 max max 0.75 max 0.0 max (j) (j) Killed 50A 0. max max 0.04 max max 0.70 max (k) Killed 400A 0. max max 0.04 max max 0.70 max (k) Killed 480A 0. max max max max 0.70 max (k) Killed 50AT 0. max (h) 0.0 max 0.04 max max 0.70 max (k) Killed 400AT 0. max (h) 0.0 max 0.04 max max 0.70 max (k) Killed 480AT 0. max (h) 0.05 max max max 0.70 max (k) Killed 700Q 0. max.50 max 0.0 max 0.04 max Boron Killed 700QT 0. max.50 max 0.0 max 0.04 max Boron Killed Reprinted with permission. E

6 Structural Quality Steels Notes a. Silicon content of % is required for Type W steel over 40 mm(6 in)in thickness, or bar diameter, except as modified by footnote lb). b. At the purchaser's request or at the producer's option, the steel may be made with no minimum silicon content provided that the steel contains a minimum of 0.0% total aluminum content. c. The elements columbium and vanadium may be used singly or in combination up total percentage indicated, except that, if columbium is used singly or in combination vanadium in plates thicker than 4 mm (0.56 in) or shapes heavier than Group, the a content shall be 0.5 minimum. Aluminum may be used as a grain refining element without prior approval by the purchaser, and when so used, shall not be included in the sum of grain refining elements included in CSA Standard G40. M, Table 4. d. Copper content of 0.% minimum may be specified by the purchaser on all grades. e. At the producer's option, material having a manganese content of.50% maximum be supplied. f. For thicknesses over mm (0.8in), carbon maximum may be 0.%. g. See clauses. and.4 in CSA Standard G40.M. h. With the prior agreement of the purchaser, the manganese content may be increase provided the sum of the carbon content Plus /6 of the manganese content does not a 0.40% for grade 50 WT or 0.4% for grade 400 VIT or 480 WT. i. A nitrogen content of % may be used if the nitrogen content does not exceed of the vanadium content. j. The combined content of chromium, nickel and copper shall be not less than.00%. k. The combined total of chromium and nickel contents shall be not less than 0.40%. Note: In order to meet the required mechanical properties, the producer may use additional alloying elements with the prior approval of the purchaser. E

7 Mechanical properties of plates, Floor Plates, Bars, and Welded Shapes Grade Usual Nominal Maximum Thickness mm Tensile Strength MPa Up to 65 mm Yield point, Mpa, minimum 65mm 00mm 00mm 50mm 50mm 0mm 0,mm 0 mm Elongation, % minimum Longitudinal 50 mm Transverse 0mm 50 mm Remarks 0G 50G 400G Not Available in plate. Barsize shapes only. Not available in plate. Barsize shapes only. 60W* 00W* 50W* 80W* Available in angles And bars only 400W 480W WT* 00WT* WT* 400WT 480WT R A 400A 480A AT 400AT 480AT Q BHN59 700QT BHN59 E4

8 Mechanical properties of plates, Floor Plates, Bars, and Welded Shapes Notes * Plates for API applications shall have an upper limit of tensile strength 40 MPa above the specified minimum. Per cent elongation is not specified or required for rolled floor plates. Transverse values apply to plates wider than 600 mm only. Notes: () In the absence of yield point, the yield strength value can be measured by 0.5% extension underload or 0.% offset method. The value obtained shall meet the specified minimum yield point for the grade. () For material having a thickness under 8 mm (5/6 in), refer to Clause 8.4. of CSA Standard CAN/CSA G40.M. () MPa N/mm². E5

9 Mechanical Properties Rolled Shapes and Sheet Piling Grade Usual Maximum Sahpe Size Group Tensile Strength Mpa Groups and Yield Pont Mpa Minimum Groups and 4 Group 5 Elongation Per Cent Minimum In 0 mm* In 50 mm 0G G G W W W W W W WT WT WT WT WT R A A AT AT Notes: () In the absence of yield point, the yield strength value can be measured by 0.5% extensionunderload or 0.% offset method. The value obtained shall meet the specified minimum yield point for the grade. () For material having a thickness under 8mm, refer to Clause 8. of CSA Standard CANG40.M. General Requirements for Rolled or Welded Structural Quality Steel. () Mpa = N/mm² E6

10 Mechanical properties Hollow Sections Grade Usual Nominal Maximum Thickness Tensile Strength MPa Yield Point Minimum MPA Percent Elongation In 50 mm Minimum 00W 6 mm W 6 mm W* 6 mm WT 6 mm WT* 6 mm A 6 mm AT 6 mm Applicable also to angles Notes: () MPa = N/mm () For material having a thickness under 8mm, refer to clause 8. of CSA Standard CANG40.M General Requirements for Rolled or Welded Quality Steel. Standard Impact Test * Temperature for Specified Category Category 4 5 Standard Test Temperature, C To be specified by the purchaser *Charpy VNotch, longitudinal specimens Before specifying, availability of product should be verified. Note: Absorbed energy values obtained from Charpy VNotch tests conducted at a particular testing temperature cannot be used to determine expected values at any other temperature. Values other than those shown may be available upon consultation between the purchaser and t he producer, and shall be ordered as Category 5 material. Standard Charpy Impact Energy * for Specified Grade Grade 60 WT 00WT 50WT 400WT 480WT 50AT 400AT 480AT 700QT Minimum Average Absorbed Energy J Categories 4 Category 5 4 To be specified by the purchaser *Charpy VNotch, longitudinal specimens. Before specifiying, availability of product should be verified. Note: Absorbed energy values obtained from Charpy VNotch tests conducted at a particular testing temperature cannot be used to dertermine expected values at any other temperature. Values other than those shown may be available upon consultation between the purchaser and the producer, and shall be ordered as Category 5 material. E

11 P Numbers ASME QW4 P Numbers P No Group No. 4 Type of base metal Carbon Steel Plate CMnSi Steel Pipe Carbon Steel Casting CrMo Pipe (½ Cr ½ Mo) CrMo Pipe ( Cr ½Mo) CrMo Pipe (¼ CrMo) MnMo Steel Plate CrMo Pipe (5 Cr½ Mo) Alloy Pipe Flangers ( Cr) Alloy Steel Plate (5 Cr) Alloy Steel Forgings ( Cr) Alloy Castings ( Cr4 Ni) Alloy Steel Tubes ( CrAl) Alloy Steel Plates ( CrTi) St. Steel Bars (Type XM0 Ann.) Alloy Pipe Flanges ( Cr8Ni) Alloy Pipe Flanges (5Cr Ni) 9A, 9B, 0A, 0B, on, up to and including p No. 6. F8