ASTM A453 Grade 662 Class B Bolts, Stud Bolts, Nuts & Washers

ASTM A453/A453M Grade 662 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 662 Class B. We produce these Grade 662 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 Gr 660 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 B Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.

ASTM A453 Grade 662 Class B 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
Titanium 1.80 - 2.10
Aluminum 0.35 max
Boron 0.001 - 0.010
Copper 0.50 max

ASTM A453 Grade 662 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
Ksi Mpa Ksi Mpa min max
Grade 662 B 125 860 80 550 15 18 248-321 24 HRC 35 HRC

ASTM A453 Grade 662 Class B Heat Treatment Requirement

Grade Class Solution Treatment Hardening Treatment
Grade 662 B 1950 +/- 25° F [1065 +/- 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 B Stress Rupture Requirement

Grade Class Test Temperature Stress, Min Time to Rupture, min, hA Elongation, min, %
°F °C Ksi Mpa
Grade 662 B 1200 650 55 380 100 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 662 Class B Marking Requirement

Grade Class B
Grade 662 FB 662B