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.

Related Specifications of ASTM A1082/A1082M Bolting

ASTM A276 ASTM A479 ASTM A453 ASTM A564 ASTM B637 ASTM A638 ASTM A693 ASTM A1014 ASTM F738 ASTM F2281 AS 7467 ISO 3506-1

ASTM A1082/A1082M Chemical Requirements^A

Grades	UNS Designation^B	Type^B	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 Treatment^{B, 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. %	Hardness^D
			Tensile Strengthksi [MPa]	Yield Strengthksi [MPa]	Elongation in 2" [50 mm] or 4D, min. %	Reduction of Area, min. %	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 Grades^A

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, %	Hardness^F		Impact Ft-lbf [J]
				Tensile Strength ksi [MPA]	Yield Strength ksi [MPA]	Elongation in 2" [50 mm] or 4D %	Reduction of Area, %	Rockwell, HRC	Brinell	Impact Ft-lbf [J]
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 Grades^A

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 %	Hardness^D
			Tensile Strength,ksi [MPA]	Yield Strength,ksi [MPA]	Elongation in 2"[50 mm] or 4D %	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
S32750	1880 - 2060 [1025 - 1125]	>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 Bolting Surface Treatment Specifications

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ASTM A1082/A1082M Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

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

ASME Dimensional Standards

B18.31.2 Imperial Continious Thread, Double End Reduced & Full Body Studs
B18.31.1M Metric Continious Thread, Double End Reduced & Full Body Studs
B16.5 Imperial Full Thread Stud Bolts
B16.5 Metric Full Thread Stud Bolts
B18.2.1 Imperial Square and Hex Bolts and Screws
B18.2.3.1M Metric Hex Cap Screws
B18.2.3.3M Metric Heavy Hex Screws
B18.2.3.5M Metric Hex Bolts
B18.3 Imperial Hexagon Socket and Spline Socket Screws
B18.3.1M Metric Socket Head Cap Screws
B18.6.7M Metric Machine Screws
B18.2.2 Imperial Square, Hex, Heavy Hex, Lock, Heavy Hex Lock Nuts
B18.2.4.1M Metric Hex Nuts
B18.2.4.6M Metric Heavy Hex Nuts
ISO 4033 Hexagon High Nuts
ISO 4032 Hexagon Nuts
ISO 4035 Hexagon Lock Nuts

ASTM A1082/A1082M Bolting Certifications

EN 10204 3.1
EN 10204 3.2
PED 2014/68/EC
MERKBLATT AD 2000 W2/W7/W10
API 20 E BSL 1/ BSL 2
NACE MR 0175
NACE MR 0103

ASTM A1082/A1082M Testing Standards

E18 Test Methods for Rockwell Hardness of Metallic Materials
E112 Test Methods for Determining Average Grain Size
E709 Guide for Magnetic Particle Testing
A962/A962M Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range
A788/A788M Specification for Steel Forgings, General Requirements

ASME Threading Specifications

ASME B1.1 Unified Inch Screw Threads (UN and UNR Thread Form)
ASME B1.3 Screw Thread Gaging System for Dimensional Acceptability - Inch Screw Threads (IN, UNR, and UNJ)
ASME B1.13M Metric Screw Threads - M Profile
ASME B1.21M Metric Screw Threads - MJ Profile
ASME B1.2 Gages & gauing for Unified Screw Threads(Imperial)

ASTM A1082/A1082M Supplementary Requirements

S1	Charpy Impact Tests
S2	Product Marking
S3	Stress Relieving
S4	Non-Destructive Inspection
S5	Proof Load Testing
S6	Cross-Sectional Hardness Testing on Nuts