ASTM A453/A453M Grade 665 Class A/B Bolts, Stud Bolts, Nuts & Washers

ASTM A453/A453M Grade 665 Class A & 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 665 Class A and B. We produce these Grade 665 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 665 (UNS S66545) for quick manufacturing and shorter delivery periods. These ASTM A453 Grade 665 Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.

ASTM A453 Grade 665 Tensile Class

Grade 665 Class A Class B

ASTM A453 Grade 665 Chemical Composition

Element
Content %
Grade 665
UNS S66545
Carbon 0.08 max
Manganese 1.25 - 2.00
Phosphorus 0.04 max
Sulfur 0.03 max
Silicon 0.10 - 0.80
Nickel 24.00 - 28.00
Chromium 12.00 - 15.00
Molybdenum 1.25 - 2.25
Tungsten ---
Titanium 2.70 - 3.30
Columbium* ---
Aluminum 0.25 max
Vanadium ---
Boron 0.01 - 0.07
Copper 0.25 max

* Or Columbium plus Tantalum

ASTM A453 Grade 665 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 665 A 170 1170 120 830 12 15 311-388 32 HRC 41 HRC
Grade 665 B 155 1070 120 830 12 15 311-388 32 HRC 41 HRC

ASTM A453 Grade 665 Heat Treatment Requirements

Grade Class Solution Treatment Hardening Treatment
Grade 665 A 1800 +/- 25° F [980 +/- 14°C], hold 3 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
Grade 665 B 2000 +/- 25° F [1095 +/- 14°C], hold 3 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 665 Stress Rupture Requirements

Grade Class Test Temperature Stress, Min Time to Rupture, min, hA Elongation, min, %
°F °C Ksi Mpa
Grade 665 A 1200 650 75 515 100 3
Grade 665 B 1200 650 70 485 100 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 665 Marking Requirements

Grade Class A Class B Class C Class D
Grade 665 FB 665A FB 665B