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    ASTM A1082/A1082M Bolting Specification

    High Strength Precipitation Hardening and Ferritic and Austenitic Duplex Stainless Steel Bolting for Special Purpose Applications

    ASTM A1082/A1082M Hex Bolts, Heavy Hex Bolts, Studs, Socket Head Cap Screws, Threaded Rods

    ASTM A1082 / A1082M covers High Strength Precipitation Hardening and Ferritic and Austenitic Duplex Stainless Steel Bolting for Special Purpose Applications such as pressure vessels. Selection will depend upon design, service conditions, mechanical properties and characteristics related to the application. Bars shall be produced in accordance with Specifications A276/A276M, A479/A479M or A564/A564M as applicable. Finish (hot or cold, ground, rough turned, drawn, etc.) shall be at the option of the manufacturer unless otherwise specified in the purchase order or contract.

    ASTM A1082/A1082M Chemical RequirementsA

    Grades UNS DesignationB TypeB C Mn P S Si Cr Ni Mo N Other Elements
    ASTM A1082/A1082M Duplex (Ferritic-Austenitic) Grades S31100 . . . 0.06 1.00 0.045 0.030 1.00 25.0-27.0 6.0-7.0 . . . . . . Ti 0.25
    S31260 . . . 0.030 1.00 0.030 0.030 0.75 24.0-26.0 5.5-7.5 2.5-3.5 0.10-0.30 Cu 0.20-0.80,W 0.10-0.50
    S31803 . . . 0.030 2.00 0.030 0.020 1.00 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20 . . .
    S32101 . . . 0.040 4.0-6.0 0.040 0.030 1.00 21.0-22.0 1.35-1.70 0.10-0.80 0.20-0.25 Cu 0.10-0.80
    S32202 . . . 0.030 2.00 0.040 0.010 1.00 21.5-24.0 1.0-2.80 0.45 0.18-0.26 . . .
    S32205 2205 0.030 2.00 0.030 0.020 1.00 22.0-23.0 4.5-6.5 3.0-3.5 0.14-0.20 . . .
    S32304 2304 0.030 2.50 0.040 0.030 1.00 21.5-24.5 3.0-5.5 0.05-0.60 0.05-0.20 Cu 0.05-0.60
    S32506 . . . 0.030 1.00 0.040 0.015 0.90 24.0-26.0 5.5-7.2 3.0-3.5 0.08-2.0 W 0.05-0.30
    S32550 255 0.040 1.50 0.040 0.030 1.00 24.0-27.0 4.5-6.5 2.9-3.9 0.10-0.25 Cu 1.50-2.50
    S32750 2507 0.030 1.20 0.035 0.020 0.80 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32 Cu 0.50
    S32760 . . . 0.030 1.00 0.030 0.010 1.00 24.0-26.0 6.0-8.0 3.0-4.0 0.20-0.30 Cu 0.50-1.00, W 0.50-1.00, %Cr+3.3x%Mo +16x%N≥40
    S32906 . . . 0.030 0.80-1.50 0.030 0.030 0.50 28.0-30.0 5.8-7.5 1.50-2.60 0.30-0.40 Cu 0.80
    S32950 . . . 0.030 2.00 0.035 0.010 0.60 26.0-29.0 3.5-5.2 1.00-2.50 0.15-0.35 . . .
    S39277 . . . 0.025 0.80 0.025 0.002 0.80 24.0-26.0 6.5-8.0 3.0-4.0 0.23-.033 Cu 1.20-2.00, W 0.80-1.20
    ASTM A1082/A1082M Precipitation Hardening Grades S15700 632 0.09 1.00 0.040 0.030 1.00 14.0-16.0 6.5-7.7 2.00-3.00 . . . Al 0.75-1.50
    S17400 630 0.07 1.00 0.040 0.030 1.00 15.0-17.0 3.0-5.0 . . . . . . Cu 3.0-5.0, Cb +Ta 0.15-0.45
    S17600 635 0.08 1.00 0.040 0.030 1.00 16.0-17.5 6.0-7.5 . . . . . . Al 0.40, Ti 0.40-1.20
    S17700 631 0.09 1.00 0.040 0.030 1.00 16.0-18.0 6.5-7.7 . . . . . . Al 0.75-1.50
    S35500 634 0.10-0.15 0.50-1.25 0.040 0.030 0.50 15.0-16.0 4.0-5.0 2.5-3.2 0.07-0.13 Cb 0.10-0.50
    • (A) Maximum or range unless otherwise indicated.
    • (B) See Guide A959/A959M.

    ASTM A1082/A1082M Solution Treatment and Mechanical Property Requirements for PH Grades

    UNS Designation Type Solution TreatmentB, C °F [°C] Mechanical Property Requirements in the Solution Treated Condition
    Tensile Strengthksi [MPa] Yield Strengthksi [MPa] Elongation in 2" [50 mm] or 4D, min. % Reduction of Area, min. % HardnessD
    Rockwell,maximum Brinell, maximum
    S15700 632 . . . . . . . . . . . . . . . 100 HRB 269
    S17400 630 Cool to below 90 [32] . . . . . . . . . . . . 38 HRC 363
    S17600 635 Air Cool 120 [825] 75 [515] 10 45 32 HRC 302
    S17700 631 . . . . . . . . . . . . . . . 98 HRB 229
    S35500 634 Hold at ≤ -100 [-73] for at least 3 hours . . . . . . . . . . . . . . . 363
    • (A) Values shown are minimums or ranges unless maximum is indicated.
    • (B) 1900 [1040] ± 25°F [15°C].
    • (C) Quenched in water unless the table specifies another media.
    • (D) Either Rockwell or Brinell testing is permitted unless thickness is below 1/2 " in which case Rockwell is preferred.

    ASTM A1082/A1082M Age Hardening Treatment and Mechanical Property Requirements for PH GradesA

    Type Condition Suggested Hardening and/or Aging Temperatures, Time at Temperature, and Quench Media °F [°C]B,C,D,E Maximum Thickness inch [mm] inclusive Mechanical Properties
    Tensile Strength ksi [MPA] Yield Strength ksi [MPA] Elongation in 2" [50 mm] or 4D % Reduction of Area, % HardnessF Impact Ft-lbf [J]
    Rockwell, HRC Brinell
    630 H900 900 [480], 1 hour 8 190 [1310] 170 [1170] 10 35 40 388 . . .
    630 H925 925 [495], 4 hours 8 170 [1170] 155 [1070] 10 38 38 375 5 [6.8]
    630 h4025 1025 [550], 4 hours 8 155 [1070] 145 [1000] 12 45 35 331 15 [20]
    630 h4075 1075 [580], 4 hours 8 145 [1000] 125 [860] 13 45 32 311 20 [27]
    630 h4100 1100 [595], 4 hours 8 140 [965] 115 [795] 14 45 31 302 25 [34]
    630 h4150 1150 [620], 4 hours 8 135 [930] 105 [725] 16 50 28 277 30 [41]
    630 h4150D 1150 [620] for 4 hrs., air cool plus 1150 [620] for 4 hrs., air cool 8 125 [860] 105 [725] 16 50 24-33 255-311 30 [41]
    630 h4150M 1400 [760] for 2 hrs., air cool plus 1150 [620] for 4 hrs., air cool 8 115 [795] 75 [520] 18 55 24 255 55 [75]
    631 RH950 1750 [955] for 10 min. to 1 h, rapidly cool to room temperature. Cool within 24 hrs. to -100 ± 10 [-75 ± 5], hold 8 hrs. min. Warm in air to room temperature. Heat to 950 [510] hold 1 h, air cool. 4 185 [1280] 150 [1030] 6 10 41 388 . . .
    631 Th4050 1400 [760] for 90 min. Cool to 55 ± 5 [15 ± 3] within 1 h, hold 1/2 h min., heat to 1050 [565], hold for 90 min., air cool 6 170 [1170] 140 [965] 6 25 38 352 . . .
    632 RH950 Same as Type 631 4 200 [1380] 175 [1210] 7 25 44 415 . . .
    632 Th4050 Same as Type 631 6 180 [1240] 160 [1100] 8 25 38 375 . . .
    634 h4000 1750 [955] for 10 min. to 1 h, water quench. Cool to -100 [75] min., hold 3 hrs. min. Temper at 1000 [540] hold for 3 h min, air cool. . . . 170 [1170] 155 [1070] 12 25 37 341 . . .
    635 H950 950 [510], 1/2 h . . . 190 [1310] 170 [1170] 8 25 39 363 . . .
    635 h4000 1000 [540], 1/2 h . . . 180 [1240] 160 [1100] 8 30 37 352 . . .
    635 h4050 1050 [565], 1/2 h . . . 170 [1170] 150 [1035] 10 40 35 331 . . .
    • (A) Values shown are minimums or ranges unless maximum is indicated.
    • (B) ± 25°F [15°C]
    • (C) Temperatures are suggested and may be varied to obtain the required tensile properties.
    • (D) Time refers to the minimum time the material is at temperature and may be extended to obtain required ductility properties.
    • (E) Quenching shall be accomplished using air or gas cooling unless the table specifies another media.
    • (F) Either Rockwell or Brinell testing is permitted unless thickness is below 1/2 " in which case Rockwell is preferred.

    ASTM A1082/A1082M Heat Treatment and Mechanical Property Requirements for Duplex GradesA

    UNS Designation Solution Temperature, °F [°C]B,C Size Range Mechanical Properties
    Tensile Strength,ksi [MPA] Yield Strength,ksi [MPA] Elongation in 2"[50 mm] or 4D % HardnessD
    Rockwell, HRC maximum Brinell, maximum
    S31100 1900 [1040] . . . 90 [620] 65 [450] 20 30 290
    S31260 1870 to 2010 [1020 to 1100] . . . 100 [690] 70 [485] 20 31 297
    S31803 1900 [1040] . . . 90 [620] 65 [450] 25 30 290
    S32101 1870 [1020] . . . 94 [650] 65 [450] 30 30 290
    S32202 1800 to 1975 [980 to 1080] . . . 94 [650] 65 [450] 30 30 290
    S32205 1900 [1040] . . . 95 [655] 65 [450] 25 30 290
    S32304 1800 [980] . . . 90 [620] 65 [450] 18 32 302
    S32506 1870 - 2050 [1020 - 1120] . . . 90[620] 65 [450] 18 32 302
    S32550 1900 [1040] . . . 110[760] 80 [550] 15 31 297
    S32750 1880 - 2060 [1025 - 1125] 2 in. and under 116[800] 80 [550] 15 33 310
    >2 in. 110 [760] 75 [515] 15 33 310
    S32760 2010 [1100] . . . 109 [750] 80 [550] 25 30 290
    S32900 1750 [955] . . . 90 [620] 70 [485] 15 30 290
    S32906 1830 to 2100 [1000 to 1150] . . . 109 [750] 80 [550] 25 33 310
    • (A) Values shown are minimums or ranges unless maximum is indicated.
    • (B) ± 25°F [15°C].
    • (C) Quenched in water.
    • (D) Either Rockwell or Brinell testing is permitted unless thickness is below 1/2" in which case Rockwell is preferred.

    ASTM A1082/A1082M Markings

    Grades UNS Designation Type Condition Grade Symbol
    ASTM A1082/A1082M Duplex (Ferritic-Austenitic) Grades S31100 . . . . . . TB 31100
    S31260 . . . . . . TB 31260
    S31803 . . . . . . TB 31803
    S32101 . . . . . . TB 32101
    S32202 . . . . . . TB 32202
    S32205 2205 . . . TB 32205
    S32304 2304 . . . TB 32304
    S32506 . . . . . . TB 32506
    S32550 255 . . . TB TB 32550
    S32750 2507 . . . TB 32750
    S32760 . . . . . . TB 32760
    S32900 . . . . . . . . .
    S32906 . . . . . . TB 32906
    ASTM A1082/A1082M Precipitation Hardening Grades S15700 632 . . . TB 157
    S15700 632 RH95 TB 157A
    S15700 632 Th4050 TB 157B
    S17400 630 . . . TB 174
    S17400 630 H900 TB 174A
    S17400 630 H925 TB 174B
    S17400 630 h4025 TB 174C
    S17400 630 h4075 TB 174D
    S17400 630 h4100 174E
    S17400 630 h4150 TB 174G
    S17400 630 h4150D TB 174H
    S17400 630 h4150M 174J
    S17600 635 . . . TB 176
    S17600 635 H950 TB 176A
    S17600 635 h4000 TB 176B
    S17600 635 h4050 TB 176C
    S17700 631 . . . TB 177
    S17700 631 RH95 TB 177A
    S17700 631 Th4050 TB 177B
    S35500 634 . . . TB 355
    S35500 634 h4000 TB 355A
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