ASTM A453 GRADE 662 CLASS A/B BOLTS | ALLOY FASTENERS

ASTM A453 Grade 662 Bolts

ASTM A453 Covers Specification for High temperature Bolting with expansion co-efficient comparable to Austenitic Stainless Steel. One of the commonly used is grade 662 Bolts. We produce Stud Bolts, Hex Bolts ,Expansion bolts,threaded rods etc as per A453 Grade 662 in Class A/B , intended for Special Engineering Applications . Alloy Fasteners Manufactures , Stocks & Supply these A453 Grade 662 A/B StudBolts, Stainless Steel Bolting in various sizes & Coatings.

For quick Quote on Grade 662 Fasteners, please contact our Sales team.

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Grades & Classes ( Click on the individual Class to navigate )

Grade 662	Class A	Class B

Material Chemical Composition Requirements

ELEMENT	Grade 660	Grade 651	Grade 662	Grade 665	Grade 668
	%	%	%	%	%
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
Grade 662	A	895 min	585 min	15	18
	B	860 min	550 min	15	18

Heat Treatment Requirements

Grade	Class	Solution Treatment	Hardening Treatment
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