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Industrial Piping Products
Grade 660 Class A
ASTM A453 Grade 660 Class A
High Temperature Stainless Steel Bolting
Introduction
ASTM A453 Grade 660 Class A is a high yield austenitic stainless steel material suitable for
high temperature bolting service. ASTM A453 specification covers requirements for
chemical composition, mechanical properties, heat treatment and other supplementary
requirements. Grade 660 is equivalent to Alloy 286 stainless steel, solution treated and
hardened to ASTM A453 Grade 660 Class specification.
Chemical Requirement
Element
Mechanical Requirement
Limits, %
Parameter
Value
2
min
max
Yield 0.2 % ( Mpa/Nmm ), Min
585
Carbon
…
0.080
Tensile ( Mpa/Nmm2), Min
895
Manganese
…
2.000
*Elongation (% in 50MM ), Min
15
Phosphorus
…
0.040
Reduction Area(%), Min
18
Sulphur
…
0.030
Hardness ( BHN )
248 - 341
Silicon
…
1.000
Hardness ( HRC )
24 - 37
Nickel
24.000
27.000
Chromium
13.500
16.000
Molybdenum
1.000
1.500
Titanium
1.900
2.350
Parameter
Value
Aluminum
…
0.350
Test Temperature °F [°C]
1200 [650]
Vanadium
0.100
0.500
Stress, ksi, min
56
Boron
0.001
0.010
Stress, Mpa, min
385
Time to Rupture, hour, min
100
Elongation, min, %
5
Stress Rupture Requirement
Heat Treatment
Solution Treatment: 1650+/- 25°F [900 +/- 14°C], hold 2 hour, and liquid quench followed by
Hardening Treatment: 1325 +/- 25°F [720 +/- 14°C], hold 16 hour, air cool.
Referenced Documents/ Specifications
Grade 660 Class A
Alloy 286
UNS S66286
Werkstoff Number 1.4980
AMS 5731
AMS 5732
AMS 5737
AMS 5525
ASTM F2281
ASTM A638 type 660
Manufactured Product Forms
Bolts, Nuts, Screws, Studs, Threaded Rods, Washers
High Strength Components
Bars and Pins
Custom Bolting Parts
Special connecting Rods
Supplementary Requirements
…
Certifications & other Compliance
Product manufactured to ASTM A453 Grade 660 Class Aare certified in conformance to EN
10204 Type 3.1 Certificate.
Applications & Industries
Aerospace
Chemical Processing
Metal and Mineral Mining
Power Generation
Research and Development Projects
Related Keywords
ASTM A453 Grade 660 Class A, Grade 660 Class A, Alloy 286 Class A, A453 660A, ASTM A453
660A, Grade 660 A, Fasteners, Bolts, Studs, Nuts, Threaded Rods, Bolting, High Temperature
Bolting, High Yield Stainless Steel, High Yield Fasteners, High Strength
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Grade 660 Class A
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The Information contained in this data sheet is for reference
purpose only and actual data may vary from product to product.
Complete rely on these values for product design is not
recommended. User will be solely responsible for any failure in
intended construction. FERROBENDTM is trademark Property of
FERROBEND.
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