ASTM A453 Grade 651 Class B Bolts, Stud Bolts, Nuts & Washers

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

ASTM A453/A453M Grade 651 Class B 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 651 Class B. We produce these Grade 651 Class B 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 as per drawing. We stock premium and surplus bar stock in Grade 651 (UNS S63198) for quick manufacturing and shorter delivery periods. These ASTM A453 Grade 651 Class B Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.

ASTM A453 Grade 651 Class B Chemical Composition

Element
	Content %
	Grade 651 UNS S63198
Carbon	0.28 - 0.35
Manganese	0.75 - 1.50
Phosphorus	0.04 max
Sulfur	0.30 max
Silicon	0.30 - 0.80
Nickel	8.00 - 11.00
Chromium	18.00 - 21.00
Molybdenum	1.00 - 1.75
Tungsten	1.00 - 1.75
Titanium	0.10 - 0.35
Columbium*	0.25 - 0.60
Copper	0.50 max

* Or Columbium plus Tantalum

ASTM A453 Grade 651 Class B 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 651	B	95	655	60^A 50^B	415 345	18	35	212-269	93 HRB	28 HRC

ASTM A453 Grade 651 Class B Heat Treatment Requirement

Grade	Class	Solution Treatment	Hardening Treatment
Grade 651	B		Hot-cold worked at 1200°F [650°C] min with 15% reduction in cross sectional area, stress relief anneal at 1350°F [730°C] min or 4 hr, min

ASTM A453 Grade 651 Class B 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 651	B	1200	650	40	275	100	5

Note : 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 651 Class B Marking Requirement

Grade	Class B
Grade 651	FB 651B