Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip 1

Transcription

1 Designation: A Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip 1 This standard is issued under the fixed designation A 69; 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 2 covers precipitation-hardening stainless steel plate, sheet, and strip. The mechanical properties of these steels are developed by suitable low-temperature heat treatments generally referred to as precipitation hardening. 1.2 These steels are used for parts requiring corrosion resistance and high strength at room temperature or at temperatures up to 600 F (1 C). Some of these steels are particularly suitable for moderate to severe drawing and forming in the solution-treated condition. Others are capable of mild forming only. They are suitable for machining in the solution-annealed condition, after which they may be hardened to the mechanical properties specified in this standard without danger of cracking or distortion. 1. The values stated in inch-pound units are to be regarded as the standard. 2. Referenced Documents 2.1 ASTM Standards: A 80/A 80M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip E 27 Practice for Numbering Metals and Alloys (UNS) 2.2 SAE Standard: 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 Originally approved in 197. Last previous edition approved in 200 as A For ASME Boiler and Pressure Vessel Code applications see related Specification SA-69 in Section II of that Code. 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. SAE J 1086 Recommended Practice for Numbering Metals and Alloys (UNS). General Requirements.1 The following requirements for orders for material furnished under this specification shall conform to the applicable requirements of the current edition of Specification A 80/A 80M or as specified in the following:.1.1 Ordering Information: In addition to the requirements of Specification A 80/A 80M, the heat treatment (see Section 6) shall be specified on the purchase order if other than the solutionannealed condition is being ordered.. Materials and Manufacture.1 The steel shall be melted by one of the following processes:.1.1 Electric furnace (with separate degassing and refining optional),.1.2 Vacuum furnace, and.1. One of the former followed by:.1..1 Consumable remelting in vacuum, inert gas, or electroslag, or.1..2 Electron beam refining..1. Other commercial melting methods as agreed upon between purchaser and seller are acceptable.. Chemical Composition.1 The steel shall conform to the requirements as to chemical composition specified in Table 1, and shall conform to applicable requirements specified in the current edition of Specification A 80/A 80M. Available from Society of Automotive Engineers (SAE), 00 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 UNS Designation B Type Carbon TABLE 1 A69 06 Chemical Requirements A Composition, % Sulfur Silicon Chromium Nickel Aluminum Manganese Phosphorus Molybdenum Titanium Copper Other Elements C S D S S S E S F S S 6200 XM S 100 XM D S 1800 XM G S 00 XM F S 000 XM H S G S A Limits are in percent imum unless shown as a range or stated otherwise. B New designation established in accordance with Practice E 27 and SAE J C The terms Columbium (Cb) and Niobium (Nb) both relate to the same element. D Columbium plus tantalum E Nitrogen F Columbium plus tantalum G Nitrogen H Columbium 8 times carbon minimum. 6. Heat Treatment of Product 6.1 Material of types other than Type UNS S6910 shall be furnished in the solution-annealed condition as noted in Tables 2 and unless otherwise specified by the purchaser on the purchase order. 6.2 Type UNS S6910 shall be furnished in cold-worked condition. 7. Mechanical Properties 7.1 The material, as represented by mechanical test specimens, shall conform to the mechanical property requirements specified in Table and shall be capable of developing the properties in Table when heat treated as specified in Bending Requirements 8.1 Samples cut from the solution-annealed plate, sheet, or strip shall withstand cold bending as specified in Table 6 without cracking on the outside of the bent portion. 9. Heat Treatment of Test Specimens 9.1 Samples cut from the plate, sheet, or strip shall conform to the mechanical properties of Table when precipitation hardened as specified in Table 2 and Table. 10. Keywords 10.1 plate; precipitation hardening; sheet; stainless steel; strip 2

3 TABLE 2 Heat Treatment, F UNS Designation Type Solution Treatment Precipitation Hardening Treatment A S F (cool as required) F, 1 h, air cool F, h, air cool F, h, air cool F, h, air cool F, h, air cool F, h, air cool. ( F, 2 h, air cool F, h, air cool). S F (cool as required) F, hold 10 cool rapidly to room temperature. Cool within 2 h, to F, hold not less than 8 h. Warm in air to room temperature. Heat to F, hold 1 h, air cool. Alternative Treatment: F, hold 90 cool to 6 Fwithin1h. Hold not less than 0 heat to F, hold for 90 air cool. S F (cool as required) Same as Type 61 S F (water quench), hold not less than hat 100 F or lower F, h, air cool F, h, air cool. S00 6 B F (quench), hold not less than hat 100 F or lower. S F (air cool) F, 0 air cool F, 0 air cool F, 0 air cool. S6200 XM F (air cool) F, 8 h, air cool. S100 XM F (cool as required) Same as Type 60 S1800 XM F (cool as required to below 60 F) F, h, air cool F, h, air cool F for not less than 10 but not more than 1 h, water quench. Cool to not higher than 100 F, hold for not less than h. Temper at F, holding for not less than h. S00 XM F (water quench) F, h, air cool. or F, h, air cool. S000 XM F (cool rapidly) F, h, air cool F, h, air cool F, h, air cool. S F (cool rapidly to room temperature) followed by subzero cooling within 2 h after solution treatment; F, hold not less than 8 h; warm in air to room temperature S6910 C F, h, air cool F, h, air cool F, h, air cool F, h, air cool F, h, air cool F, h, air cool A Times refer to time material is at temperature. B Equalization and over-tempering treatment: F for not less than h, cool to room temperature, heat to F for not less than h. C Furnished in cold-worked condition.

4 TABLE Heat Treatment, C UNS Designation Type Solution Treatment Precipitation Hardening Treatment A S C (cool as required) C, 1 h, air cool C, h, air cool C, h, air cool C, h, air cool C, h, air cool C, h, air cool. ( C, 2 h, air cool C, h, air cool). S C (water quench) C, hold 10 cool rapidly to room temperature. Cool within 2 h to 7 C 6 6 C, hold not less than 8 h. Warm in air to room temperature. Heat to C, hold 1 h, air cool. Alternative Treatment C, hold 90 cool to 1 6 Cwithin1h. Hold not less than 0 heat to C, hold for 90 air cool. S C (water quench) Same as Type 61 S C (water quench), hold not less than hat 7 C or lower. S00 6 B C (quench), hold not less than hat 7 C or lower. 6 8 C, h, air cool C, h, air cool C for not less than 10 but not more than 1 h, water quench. Cool to not higher than 7 C, hold for not less than h. Temper at C, holding for not less than h. S C (air cool) C, 0 air cool C, 0 air cool C, 0 air cool. S6200 XM C (air cool) C, 8 h, air cool. S100 XM C (cool as required) Same as Type 60 S1800 XM C (cool as required to below 60 C) C, h, air cool C, h, air cool. S00 XM C (water quench) C, h, air cool. or C, h, air cool. S000 XM C (cool rapidly) C, h, air cool C, h, air cool C, h, air cool. S C, (cool rapidly to room temperature) followed by subzero cooling within 2 h after solution treatment; C; hold not less than 8 h; warm in air to room temperature S6910 C C, h, air cool C, h, air cool C, h, air cool C, h, air cool C, h, air cool C, h, air cool A Times refer to time material is at temperature. B Equalization and over-tempering treatment: C for not less than h, cool to room temperature, heat to C for not less than h. C Furnished in cold-worked condition.

5 TABLE Mechanical Test Requirements in Solution-Treated Condition Tensile Strength, Yield Strength, Elongation in Hardness, Type 2 in. or 0 mm, ksi MPa ksi MPa % Rockwell Brinell to.0 in. (0.8 to 102 mm) C in. (0.2 mm) and under Over to.0 in. (0.2 to 102 mm) B to.0 in. (0.08 to 102 mm) B to in. (0.0 to 0.08 mm), excl C to in. (0.0 to 0.0 mm), excl C to 0.00 in. (0.0 to 0.1 mm), excl C to in. (0.1 to 0.2 mm), excl C0... Over in. (0.2 mm) C A Plate C in. (0.76 mm) and under Over 0.00 to in. (0.76 to 1.2 mm) Over in. (1.2 mm) C2 C2 C2 XM-9 Over in. (0.2 mm) C28... XM to.00 in. (0.08 to mm) C8 6 XM to.00 in. (0.08 to mm) C8 6 XM in. (0.2 mm) and greater XM-2 B in. (0.2 mm) and greater C 11 S in. (.6 mm) and under C... A Solution-treated, equalized, and over-tempered plate only. B XM-2 also furnished to the following minimum properties: C2 2

6 TABLE Mechanical Test Requirements After Precipitation Hardening Treatment Grade Hardening or Precipitation Treatment or both, F( C) Thickness, in. (mm) Tensile Yield ksi MPa ksi MPa Elongationin2 in. or 0 mm, Reduction of Area, Hardness, min Rockwell, 60 and 900 (82) Under (.762) C0/ C8 XM to 0.62 (.762 to C0/ C to.0 (1.90 to 102) C0/ C8 Brinell, Impact Charpy V, min B ft lbf J 88/ 77 88/ (96) Under (.762) C8/ C to 0.62 (.762 to C8/ C to.0 (1.90 to 102) C8/ C7 102 (2) Under (.762) C/ C to 0.62 (.762 to C/ C to.0 (1.90 to 102) C/ C2 107 (79) Under (.762) C1/ C to 0.62 (.762 to C29/ C to.0 (1.88 to 102) C29/ C (9) Under (.762) C1/ C to 0.62 (.762 to C29/ C to.0 (1.88 to 102) C29/ C8 110 (621) Under (.762) C28/ C to 0.62 (.762 to C26/ to.0 (1.88 to 102) C26/ 7/ 77 7/ 77 21/ 1 21/ / 7 29/ / 7 29/ / 2 269/ Under (.762) C26/ ( ) to 0.62 (.762 to C2/ C to.0 (1.88 to 102) C2/ C 2/ 1 28/ 21 28/ (760) to (0.08 to 0.12) plus (1) to (0.127 to 0.21) 100 (66) to (0.2 to 0.0) to (0.1 to to 0.62 (.762 to 170 (9) to (0.08 to 0.12) minus 100 (7) to (0.127 to 0.21) + 90 (10) to (0.2 to 0.0) to (0.1 to C C C C C C C C C

7 Grade Hardening or Precipitation Treatment or both, F( C) Thickness, in. (mm) to 0.62 (.762 to TABLE Continued Tensile Yield ksi MPa ksi MPa Elongationin2 in. or 0 mm, Reduction of Area, Hardness, min Rockwell, Brinell, Impact Charpy V, min B C ft lbf J (82) to 0.00 (0.08 to 1.27) to 0.00 (0.08 to 1.27) C C (760) to (0.08 to 0.12) plus (1) to (0.127 to 0.21) 100 (66) to (0.2 to 0.0) to (0.1 to to 0.62 (.762 to 170 (9) to (0.08 to 0.12) minus 100 (7) to (0.127 to 0.21) + 90 (10) to (0.2 to 0.0) to (0.1 to to 0.62 (.762 to C C C C C C C C C C (82) to 0.00 (0.08 to 0.1) to 0.00 (0.08 to 0.1) C C () to (0.022 to 0.08) to (0.08 to 0.01) to (0.01 to 0.2) to (0.2 to.762) C C C C (0) to (0.022 to ) to (0.08 to ) to (0.01 to ) to (0.2 to.762) () (0) C (10) 0.00 (0.76) and under 0.00 to (0.76 to 1.2) C9 C9 Over (1.2) Plate C9 C (0) 0.00 (0.76) and under C to (0.76 to 1.2) C Over (1.2) C Plate C

8 Grade Hardening or Precipitation Treatment or both, F( C) Thickness, in. (mm) TABLE Continued Tensile Yield ksi MPa ksi MPa Elongationin2 in. or 0 mm, Reduction of Area, Hardness, min Rockwell, Brinell, Impact Charpy V, min B 100 (6) 0.00 (0.76) and under C to (0.76 to 1.2) C Over (1.2) C Plate ft lbf J XM-1 90 (10) Under (0.1) C to (0.1 to C to 0.62 (.760 to C to.0 (1.90 to 102) C (8) Under (0.1) C to (0.1 to C to 0.62 (.760 to C to.0 (1.90 to 102) C XM (10) Up to (0.1) Over to (0.1 to 1.7) Over (1.7) C C C XM (82) Up to (0.1) Over to (0.1 to 1.7) Over (1.7) C0 C0 C (8) Up to (0.1) Over to (0.1 to 1.7) Over (1.7) (621) Up to (0.1) Over to (0.1 to 1.7) Over (1.7) C26 C26 C26 XM (82) Over (0.2) C S (82) 90 (10) 1000 (8) 100 (66) 1100 (9) 0.10 (.6) and under 0.10 (.6) and under 0.10 (.6) and under 0.10 (.6) and under 0.10 (.6) and under C8 C7 C C C9 S to 0.1 (0.020 to.8) +890 (7) to 0.1 (0.020 to.8) to (0.01 to 2.) +890 (7) to (0.01 to 2.) to 0.07 (0.01 to 1.2) +890 (7) to 0.07 (0.01 to 1.2) to (0.01 to 0.70) C C C C C C C

9 Grade Hardening or Precipitation Treatment or both, F( C) +890 (7) +890 (7) Thickness, in. (mm) to (0.01 to 0.70) to (0.01 to 0.1) to (0.01 to 0.1) TABLE A69 06 Continued Tensile Yield ksi MPa ksi MPa Elongationin2 in. or 0 mm, Reduction of Area, Hardness, min Rockwell, Brinell, Impact Charpy V, min B C C C A Applicable to tests in the long transverse direction. Transverse to the direction of rolling and parallel to the product surface. B Impact test is not required unless specified on the purchase order. ft lbf J TABLE 6 Bend Test Requirements in Solution-Treated Condition Type Size, in. (mm) Cold Bend Degrees 60 none required (.76) and under Over to 0.27 (.76 to 6.98) (.76) and under Over to 0.27 (.76 to 6.98) Bend Test Mandrel 1T A T 1T T 6 Under (.762) 2T to 0.29 (.76 to 6.2) 10 T Over 0.29 to 0.70 (6.2 to 19.08) 90 T 6 none required XM (2.77) and under 9T XM-12 none required XM-1 none required XM-16 Under (.762) 6T XM-2 Under (.762) 6T S (.6) and under 6T A T = thickness of sheet being tested. SUMMARY OF CHANGES Committee A01 has identified the location of selected changes to this standard since the last issue, A 69 0, that may impact the use of this standard. (Approved March 1, 2006.) (1) Added S6910 by revising 6.1, adding 6.2, and revising Tables 1- and Table. 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 determination 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 ( 9