The specification for ASTM A453 covers five grades of bolting with twelve classes of yield strength ranging from 50 to 120 ksi (345 to 827 MPa) and is commonly used in high temperature environment such as fasteners for pressure vessels and valve flanges. The material included in ASTM A453 requires special processing and is not intended for general purpose applications.

Forms of ASTM A453 Fastener Available at JM-INDUSTRY

	Product name	Standard No.	Size
BOLT	HEX HEAD BOLT	ANSI/ASME B18.2.1, DIN933, DIN931	1/4”-4”, M5-M100
	SOCKET CAP SCREW	ANSI/ASME B18.3, DIN912, DIN7991	1/4”-4”, M5-M100
	FLANGE BOLT	ANSI/ASME B18.2.3.4M-2001, DIN 6921	1/2”-4”, M10-M100
STUD BOLT	THREADED ROD/BAR	ANSI/ASME, DIN975/DIN976	3/8”-4”, M5-M100
	DOUBLE ENDS STUDS	ANSI/ASME, DIN STANDARD	3/8”-4”, M5-M100
NUT	HEAVY HEX NUT	ANSI/ASME B18.2.2, DIN934	1/4”-4”, M5-M100
	SQUARE NUT	ANSI/ASME, DIN 557	1/2”-4”, M12-M100
	FLANGE NUT	ANSI/ASME, DIN6923	1/2”-4”, M12-M100
	COUPLING NUT/LONG NUT	ANSI/ASME, DIN STANDARD	1/2”-4”, M12-M100
WASHER	FLAT WASHER	ANSI/ASME B18.22.1, DIN125	3/8”-4”, M6-M100
	SPRING WASHER	ANSI/ASME B18.21.1, DIN127	3/8”-4”, M6-M100

Material Chemical Composition Requirements

Grade	Grade 660	Grade 651	Grade 662	Grade 665	Grade 668
UNS Number	S66286	S63198	S66220	S66545	S66285
ELEMENT	%	%	%	%	%
Carbon	0.08 max	0.28-0.35	0.08 max	0.08 max	0.08 max
Manganese	2.00 max	0.75-1.5	0.40-1.00	1.25-2.00	2.00 max
Phosphorus, max	0.040 max	0.040 max	0.040 max	0.040 max	0.040 max
Sulfur, max	0.030 max	0.030 max	0.030 max	0.030 max	0.030 max
Silicon	1.00 max	0.30-0.80	0.40-1.00	0.1-0.80	1.00 max
Nickel	24.0-27.0	8.0-11.0	24.0-28.0	24.0-28.0	17.5-21.5
Chromium	13.5-16.0	18.0-21.0	12.0-15.0	12.0-15.0	13.5-16.0
Molybdenum	1.00-1.50	1.00-1.75	2.0-3.50	1.25-2.25	1.50 max
Tungsten	...	1.00-1.75	...	...	...
Titanium	1.9-2.35	0.1-0.35	1.80-2.10	2.70-3.30	2.20-2.80
Columbium *	...	0.25-0.6	...	...	...
Aluminum	0.35 max		0.35 max	0.25 max	0.50 max
Vanadium	0.10-0.50		...	...	0.50 max
Boron	0.001-0.010		0.001-0.010	0.01-0.07	0.001-0.010
Copper		0.50 max	0.50 max	0.25 max	...

Mechanical Properties Requirements

Size	Class	Tensile, Mpa	Yield, Mpa	Elong. %, min	RA %, min	Brinell Hardness	Approximate Rockwell Hardness                B and C
Grade 660	A, B , & C	895 min	585 min	15	18	248-341	24-37 HRC
	D	895 min	725 min	15	18	248-321	24-35 HRC
Grade 651	A	690 min	485 min (D<=3" ）	18	35	217-277	95HRB-29HRC
			415 min  (D>3" ）
	B	655 min	415 min  (D<=3" ）	18	35	212-269	93HRB-28HRC
			345 min  (D>3" ）
Grade 662	A	895 min	585 min	15	18	248-321	24-35 HRC
	B	860 min	550 min	15	18	248-321	24-35 HRC
Grade 665	A	1170 min	830 min	12	15	311-388	32-41 HRC
	B	1070 min	830 min	12	15	311-388	32-41 HRC
Grade 668	A & B	895 min	585 min	15	18	248-341	24-37 HRC

Heat Treatment Requirements

Grade	Class	Solutiona Treatment	Hardening Treatment
660	A	1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench	1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
	B	1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench	1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
	C	1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and oil quench	1425 +/- 25 °F [775 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool
	D	1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench OR	1325 +/- 25 °F [720 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool
		1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench	if neccessary to achieve properties, second age : 1200 +/- 25 °F [650 +/- 14 °C] hold 16h, air cool
651	A		hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1200 °F [650 °C] min or 4h, min
	B		hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1350 °F [730 °C] min or 4h, min
662	A	1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench	1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
	B	1950 +/- 25 °F [1065 +/-14 °C], hold 2 h, min and liquid quench	1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
665	A	1800 +/- 25 °F [980 +/-14 °C], hold 3 h, min and liquid quench	1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
	B	2000 +/- 25 °F [1095 +/-14 °C], hold 3 h, min and liquid quench	1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool
668	A	1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench	1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool
	B	1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench	1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool

Stree Rupture Requirements

Grade	Class	Test Temperature	Stress, Min		Time to Rupture	Elongation
		Deg F [ Deg C ]	Ksi	Mpa	Min, h*	Min %
660	A, B & C	1200 [650]	56	385	100	5
651	A & B	1200 [650]	40	275	100	5
662	A & B	1200 [650]	55	380	100	5
665	A	1200 [650]	75	515	100	3
	B	1200 [650]	70	485	100	5