ASTM A453 Grade 660

ASTM A453 Grade 660

ASTM A453 Grade 660 BoltsASTM A453 Grade 660 is a material specification for high tensile stainless steel Bolts Studs and Nuts, intended for use in high temperature services. ASTM A453 Grade 660 includes 4 tensile property class A / B / C and D. Each with different mechanical and stress rupture requirements. Class D does not state any stress rupture test requirement. ASTM A453/A453M is confined to bolts, nuts and similar bolting components. Some commonly produced product forms in ASTM A453 grade 660 are stud bolts, hex bolts, socket head cap screws, hex nuts, heavy hex nuts, etc. ASTM A453 Gr 660 is chemically equivalent to ASTM A638 Grade 660 stainless steel, alternatibely know as Alloy A286 or by UNS S66286 material. ASTM A453 grade 660 material is widely used for manufacturing boltings for boilers, pressure vessels, pipeline flanges and valves, with constant high temperature service.

Boltport fasteners are eminent manufacturers and suppliers of ASTM A453 grade 660 Bolts in India. We can offer grade 660 bolts with NACE compliance.

Find information on ASTM A453 grade 660 tensile classes, chemical composition, heat treatment, mechanical properties, available product forms, surface coatings, etc.

For a quick quote on ASTM a453 grade 660 bolts, send us an enquiry on info@boltport.com

ASTM A453 Grade 660 Tensile Class

ASTM A453 Grade 660 Chemical Composition

Elements Range Product Variation, Over or UnderB
Carbon 0.08 max % 0.01 over
Manganese 2.00 max % 0.04
Phosphorus 0.040 max % 0.005 over
Sulfur 0.030 max % 0.005 over
Silicon 1.00 max % 0.05
Nickel 24.0 - 27.0 % 0.20
Chromium 13.5 - 16.00 % 0.20
Molybdenum 1.00 - 1.50 0.05
Tungsten - -
Tantalum 1.90 - 2.35 % 0.05
ColumbiumA ... ...
Aluminum 0.35 max % 0.05 over
Vanadium 0.10 - 0.50 % 0.03
Boron 0.001 - 0.010 % 0.0004 under to 0.0001 over
Copper - 0.15

ASTM A453 Grade 660 Heat Treatment

Grade Class Solutions Treatment Hardening Treatment
660 A 1650±25°F[900±14°C], hold 2h, min, and liquid quench 1325±25°F[720±14°C], hold 16h, air cool
660 B 1800±25°F[900±14°C], hold 1h, min, and liquid quench 1325±25°F[720±14°C], hold 16h, air cool
660 C 1800±25°F[900±14°C], hold 1h, min, and oil quench 1425±25°F[775±14°C], hold 16h, air cool
1200±25°F[650±14°C], hold 16h, air cool
660 D 1650±25°F[900±14°C], hold 2h min, and liquid quench OR
1800±25°F[980±14°C], hold 1h min, and liquid quench
1325±25°F[720±14°C], hold 16h, air cool
If necessary to achieve properties, second age:
1200±25°F[650±14°C], hold 16h, air cool

ASTM A453 Grade 660 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 660 A, B and C 130 895 85 585 15 18 248-341 24 HRC 37 HRC
Grade 660 D 130 895 105 725 15 18 248-341 24 HRC 35 HRC

A Material sizes 3 in, [76 mm] and under in diameter.
B Material sizes over 3 in, [76 mm] in diameter.
C Conversation numbers taken from specification A 193/A 193M

ASTM A453 Grade 660 Creep / Stress Rupture Test Requirement

Grade Class Test Temperature Stress, Min Time to Rupture, min, hA Elongation, min, %
    °F °C Ksi Mpa    
Grade 660 A, B and C 1200 650 56 385 100 5
ASTM A453 Grade 660 Stud Bolts

ASTM A453 Grade 660 Products


Fastener Coatings