Standard Specification for Stainless Steel Bars and Shapes 1

Transcription

1 Designation: A Standard Specification for Stainless Steel Bars and Shapes 1 This standard is issued under the fixed designation A 276; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* 1.1 This specification covers hot-finished or bars except bars for reforging (Note 1). It udes rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels. The free-machining types (Note 2) for general corrosion resistance and high-temperature service are covered in a separate specification. NOTE 1 For bars for reforging, see Specification A 314. NOTE 2 For free-machining stainless bars designed especiy for optimum machinability, see Specification A 582/A 582M. NOTE 3 There are standards covering high nickel, chromium, austenitic corrosion, and heat resisting oy materials. These standards are under the jurisdiction of ASTM Subcommittee B02.07 and may be found in Annual Book of ASTM Standards, Vol The values stated in inch-pound units are to be regarded as the standard. 2. Referenced Documents 2.1 ASTM Standards: 2 A 314 Specification for Stainless Steel Billets and Bars for Forging A 370 Test Methods and Definitions for Mechanical Testing of Steel Products A 484/A 484M Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings A 582/A 582M Specification for Free-Machining Stainless Steel Bars A 751 Test Methods, Practices, and Terology for Chemical Analysis of Steel Products E 527 Practice for Numbering Metals and Alloys (UNS) 1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.17 on Flat-Rolled and Wrought Stainless Steel. Current edition approved March 1, Published March Originy approved in Last previous edition approved in 2005 as A a. 2 For referenced ASTM standards, visit the ASTM website, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard s Document Summary page on the ASTM website. 2.2 SAE Document: 3 SAE J 1086 Recommended Practice for Numbering Metals and Alloys 3. Ordering Information 3.1 It is the responsibility of the purchaser to specify requirements that are necessary for material ordered under this specification. Such requirements may ude but are not limited to the following: Quantity (weight or number of pieces), Name of material: stainless steel, Form (bars, angles, etc.), Condition (Section 4.1), Finish (Section 8 of Specification A 484/A 484M), Surface preparation of shapes (Section 8 of Specification A 484/A 484M), Applicable dimensions uding size, thickness, width, and length, Cross section (round, square, etc.), Type or UNS designation (Table 1), ASTM designation and date of issue, and Whether bars are to be rolled as bars or cut from strip or plate Test for magnetic permeability when specified by customer purchase order when ordering Types 201 and Special requirements. NOTE 4 A typical ordering description is as follows: 5000 lb (2268 kg) Stainless Steel Bars, Annealed and Centerless Ground, in. (38.10 mm) Round, 10 to 12 ft (3.05 to 3.66 m) in length, Type 304, ASTM Specification A 276 dated. End use: machined valve parts. 4. Manufacture 4.1 Condition: Bars sh be furnished in one of the following conditions listed in the Mechanical Requirements table: Condition A Annealed 3 Available from Society of Automotive Engineers (SAE), 0 Commonwealth Dr., Warrendale, PA *A Summary of Changes section appears at the end of this standard. Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA , United States. 1

2 生 活 话 题 & 阅 读 体 验 & E 书 共 享 & 影 音 交 流 QQ 群 As a reader( ) 读 书 新 知 生 TABLE 1 Chemical Requirements A UNS Designation B Type Carbon Manganese Composition, % Sulfur Silicon Chromium Nickel Austenitic Grades Phosphorus Molybdenum Nitrogen Other Elements N Cu 0.75 N Cu 0.50 Cb 8 3 C 0. max S S S S S S20910 XM Cb , V S S21900 XM S21904 XM S200 XM S24100 XM S Cu S S B S S L C S N S302 XM S LN S S S S Ce S S S S Cb Cb 103C-1.10 S S08 S S Cb Cb 103C-1.10 S Cu S S S L C S Ti Ti 53(C+N)-0.70 S Cb Cb 103C-1.10 S N S31653 S LN S S S S Cu S S Ti 53(C+N)-0.70 D S Cu S Cb 0.10 S Cb 103C 1.10 S Cb 103C 1.10, Ta 0.10 Co 0.20 Austenitic-Ferritic Grades S31100 XM Ti 0.25 S S Cu S S Cu S W S Cu S32760 E Cu W Ferritic Grades S Al

3 UNS Designation B Type Carbon Manganese TABLE 1 Continued Composition, % Sulfur Silicon Chromium Nickel Phosphorus Molybdenum Nitrogen Other Elements S Cb 103(C+N) S S S Ti+Cb (C+N) S S44627 XM-27 F G G Cu 0.20 Cb S C+N Cu 0.15 S C+N Cu 0.15 Martensitic Grades S S S410 XM Cb S S Cu 0.30 S41500 H S S S S402 4A S403 4B S404 4C A Maximum, unless range or imum is indicated. B Designations established in accordance with Practice E 527 and SAE J C For some applications, the substitution of Type 304L for Type 304, or Type 316L for Type 316 may be undesirable because of design, fabrication, or service requirements. In such cases, the purchaser should so indicate on the order. D Nitrogen content is to be reported for this grade. E %Cr+3.33 %Mo+163 %N$. F Nickel plus copper sh be 0.50 % max. G Product analysis tolerance over the maximum limit for carbon and nitrogen sh be %. H Wrought version of CA 6NM Condition H Hardened and tempered at a relatively low temperature Condition T Hardened and tempered at a relatively high temperature Condition S Strain Hardened Relatively light cold work Condition B Relatively severe cold work 5. Chemical Composition 5.1 The steel sh conform to the requirements for chemical composition specified in Table Methods and practices relating to chemical analysis required by this specification sh be in accordance with Test Methods, Practices, and Terology A Mechanical Properties Requirements 6.1 The material sh conform to the mechanical test requirements specified in Table The martensitic grades sh be capable of meeting the hardness requirements after heat treating as specified in Table Hardness measurements, when required, sh be made at a location midway between the surface and the center of the cross section. 7. Magnetic Permeability 7.1 When required by the purchase order, the magnetic permeability of Types 201 and 205 in the annealed condition sh not exceed 1.2 as tested by a Severn-type indicator. 8. General Requirements 8.1 In addition to the requirements of this specification, requirements of the current edition of Specification A 484/ A 484M sh apply. Failure to comply with the general requirements of Specification A 484/A 484M constitutes nonconformance to this specification. 9. Certification 9.1 Upon request of the purchaser in the contract or order, the producer s certification that the material was manufactured and tested in accordance with this specification, together with a certified report of the test results sh be furnished at the time of the shipment. 10. Keywords 10.1 austenitic stainless steel; austenitic-ferritic duplex stainless steel; ferritic stainless steel; martensitic stainless steel; stainless steel bars; stainless steel shapes 3

4 TABLE 2 Mechanical Requirements Type Condition Finish Diameter or Thickness, in. (mm) Tensile Strength, Yield Strength, A ksi MPa ksi MPa Elongationin2 in. (50 mm) B or 4D % Reduction of Area, C,D, % Austenitic Grades N08367 A hot-finished or N08700 A hot-finished or , 202 A hot-finished or S20161 A hot-finished S20162 A hot-finished or cold finished 205 A hot-finished or XM-19 A hot-finished or As hot-finished or up to 2 (50.8), hotrolled over 2 to 3 (50.8 to 76.2), over 3 to 8 (76.2 to 203.2), S21800 A hot-finished or XM-10, XM-11 A hot-finished or XM-29 A hot-finished or XM-28 A hot-finished or S265 A hot-finished or S28200 A hot-finished or cold finished 302, 302B, 304, 304LN, A hot-finished 75 F F 205 G , 308, 309, 309S, up to 1 2 (12.70) Cb,, S, over 1 2 (12.70) 75 F F Cb, 314, 316, 316LN, 316Cb, 316TI, 317, 321, 347, L, 316L A hot-finished G 50 up to 1 2 (12.70). over 1 2 (12.70) N, 316N A hot-finished or , 302, 304, 304N, 316, B up to 3 4 (19.05) N 304L, 316L over 3 4 (19.05) to (25.) over 1 (25.) to (31.75) over (31.75) to (38.10) over (38.10) to (44.) 304, 304N, 316, 316N S up to 2 (50.8) L, 316L over 2 to (50.8 to 63.5) over to 3 (63.5 to 76.2) XM-21, S304, A hot-finished or S31654 XM-21, S304 B up to 1 (25.) S31654 over 1 (25.) to (31.75) over (31.75) to (38.10) Brinell Hardness, E max 4

5 Type Condition Finish TABLE 2 Diameter or Thickness, in. (mm) Continued Tensile Strength, Yield Strength, A Elongationin2 in. (50 mm) B or 4D % Reduction of Area, C,D, % ksi MPa ksi MPa over (38.10) to (44.) S30815 A hot-finished or S31254 A hot-finished or S31725 A hot-finished or S31726 A hot-finished or S31727 A hot-finished or S32053 A hot-finished or S32654 A hot-finished or Austenitic-Ferritic Grades XM-26 A hot-finished or S31803 A hot-finished or S32056 A hot-finished or S32101 A hot-finished or S32205 A hot-finished or S32304 A hot-finished or S32550 A hot-finished or S32550 S S32760 A hot-finished or S32760 S Ferritic Grades 5 H A hot-finished A hot-finished A hot-finished or S976 A hot-finished or S440 A hot-finished , XM-27 A hot-finished S44700 A hot-finished S44800 A hot-finished Martensitic Grades 3, 410 A hot-finished , 410 T hot-finished XM-30 T hot-finished , 410 H hot-finished (rounds only) XM-30 A hot-finished A hot-finished or T hot-finished or Brinell Hardness, E max 5

6 Type Condition Finish TABLE 2 Diameter or Thickness, in. (mm) Continued Tensile Strength, Yield Strength, A Elongationin2 in. (50 mm) B or 4D % Reduction of Area, C,D, % ksi MPa ksi MPa S41425 T hot-finished S41500 T hot-finished or A hot-finished S42010 A hot-finished A hot-finished or 285 4A, 4B, and 4C A hot-finished Brinell Hardness, E max A Yield strength sh be detered by the 0.2 % offset method in accordance with Test Methods and Definitions A 370. An alternative method of detering yield strength may be used based on a total extension under load of 0.5 %. B For some specific products, it may not be practicable to use a 2-in. or 50-mm gage length. The use of sub-size test specimens, when necessary, is permissible in accordance with Test Methods and Definitions A 370. C Reduction of area does not apply on flat bars 3 16 in. (4.76 mm) and under in thickness as this deteration is not genery made in this product size. D The material sh be capable of meeting the required reduction of area where listed, but actual measurement and reporting of the reduction of area are not required unless specified in the purchase order. E Or equivalent Rockwell hardness. F For extruded shapes of Cr-Ni grades of Condition A, the yield strength sh be 25 ksi (170 MPa) and tensile strength sh be 70 ksi (480 MPa). G For shapes having section thickness of 1 2 in. (12.5 mm) or less, 30%. elongation is acceptable. H Material sh be capable of being heat treated to a maximum Brinell hardness of 250 when oil quenched from 1750 F (953 C). Type A TABLE 3 Response to Heat Treatment Heat Treatment Temperature B F ( C), Quenchant Hardness HRC, (955) Air (955) Air (955) Oil (995) Air 50 S (1010) Oil (1020) Oil 4A 1875 (1020) Air 55 4B 1875 (1020) Oil 56 4C 1875 (1020) Air 58 A Samples for testing sh be in the form of a section not exceeding 3 8 in. (9.50 mm) in thickness. B Temperature tolerance is 625 F (14 C). SUMMARY OF CHANGES Committee A01.17 has identified the location of selected changes to this standard since the last issue, A a, that may impact the use of this standard. (Approved March 1, 2006.) (1) Added 304L and 316L to Table 2 for condition B and condition S. 6

7 Committee A01.17 has identified the location of selected changes to this standard since the last issue, A , that may impact the use of this standard. (Approved Sept. 1, 2005.) (1) Added UNS N08700 to Table 1 and Table 2. Committee A01.17 has identified the location of selected changes to this standard since the last issue, A , that may impact the use of this standard. (Approved March 1, 2005.) (1) Added S31727, S32053, and S32506 to Table 1 and Table 2. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that deteration of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA , United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at (phone), (fax), or service@astm.org ( ); or through the ASTM website ( 7