ASTM A453 Grade 660 Class D Bolts
ASTM A453 Grade 660 Class D Bolts are manufactured from Stainless Steel Alloy A286 and heat treated to achieve minimum tensile requirement of 895 MPa and yield of 725 MPa and Brinell hardness between 248 to 341 BHN. Boltport Fastener is a manufacturer and supplier of ASTM A453 Grade 660 Class D Bolts in India. ASTM A453 Gr 660 class d is a material specification for high tensile stainless steel bolts, intended for high temperature service. We produce stud-bolts, hex bolts, heavy hex bolts, allen head bolts, push bolts, custom bolts and fasteners in ASTM A453 gr 660 cl d material. A453/A453M specifies both imperial and metric fasteners in grade 660. ASTM A453 Grade 660 Class D does not have any requirement for stress rupture test.
Grade 660 Class D bolts are used in bolting boilers, pressure vessels, pipe flanges and valves with high temperature service. Boltport can supply ASTM A453 Grade 660 Class D Bolts with NACE compliance.
Find more information on ASTM a453 grade 660 class d mechanical properties, heat treatment, and available products in class D.
ASTM A453 Grade 660 Chemical Composition (Incoloy® Alloy A286 / ASTM A638 UNS S66286)
|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|
|Tantalum||1.90 - 2.35 %||0.05|
|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|
ASTM A453 Grade 660 Class D Heat Treatment
|Grade||Class||Solutions Treatment||Hardening Treatment|
|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 Class D Mechanical Properties
|Grade||Class||Tensile Strength||Yield Strength||Elongation
in 4D, min, %
of Area, min, %
Hardness, B & C
|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