ASTM A453/A453M Grade 662 Class A Bolts, Stud Bolts, Nuts & Washers

Introduction
Chemical Composition
Mechanical Properties
Heat Treatment
Stress Rupture Requirement
Marking Requirement

ASTM A453/A453M Grade 662 Class A Stainless Steel Bolting for High Temperature Applications

We offer precisely made Stud Bolts, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Threaded Rods, Nuts & Washers as per ASTM A453 Grade 662 Class A. We produce these Grade 662 Class A Bolts from 3/8" to 4" in imperial and upto M100 in metric sizes. Larger size bolts can be made to order as per request. We also undertake custom made boltings in A453 Gr 662 as per drawing. We stock premium and surplus bar stock in Grade 662 (UNS S66220) for quick manufacturing and shorter delivery periods. These ASTM A453 Grade 662 Class A Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.

ASTM A453 Grade 662 Class A Chemical Composition

Element
	Content %
	Grade 662 UNS S66220
Carbon	0.08 max
Manganese	0.40 - 1.00
Phosphorus	0.04 max
Sulfur	0.03 max
Silicon	0.40 - 1.00
Nickel	24.00 - 28.00
Chromium	12.00 - 15.00
Molybdenum	2.00 - 3.50
Tungsten	---
Titanium	1.80 - 2.10
Columbium*	---
Aluminum	0.35 max
Vanadium	---
Boron	0.001 - 0.010
Copper	0.50 max

* Or Columbium plus Tantalum

ASTM A453 Grade 662 Class A Mechanical Properties

Grade	Class	Tensile Strength		Yield Strength		Elongation in 4D, min, %	Reduction of Area, min, %	Brinell Hardness Number	Approximate Rockwell Hardness, B & C
Grade	Class	Ksi	Mpa	Ksi	Mpa	Elongation in 4D, min, %	Reduction of Area, min, %	Brinell Hardness Number	min	max
Grade 662	A	130	895	85	585	15	18	248-321	24 HRC	35 HRC

ASTM A453 Grade 662 Class A Heat Treatment Requirement

Grade	Class	Solution Treatment	Hardening Treatment
Grade 662	A	1800 +/- 25° F [980 +/- 14°C], hold 2 hr and liquid quench	1350 to 1400° F [730 to 760°C], hold 20 hr, furnace cool to 1200 +/- 25°F [650 +/- 14°C], hold 20hr, air cool

ASTM A453 Grade 662 Class A Stress Rupture Requirement

Grade	Class	Test Temperature		Stress, Min		Time to Rupture, min, h^A	Elongation, min, %
Grade	Class	°F	°C	Ksi	Mpa	Time to Rupture, min, h^A	Elongation, min, %
Grade 662	A	1200	650	55	380	100	5

The combination bar specimen shall be tested continuously at the temperature and at the minimum stress specified or at a greater stress and shall rupture in a time not less than than specified.

ASTM A453 Grade 662 Class A Marking Requirement

Grade	Class A
Grade 662	FB 662A