ASTM A453 Grade 660 Screws

ASTM A453 Grade 660 Screws

ASTM A453 Grade 660 ScrewsASTM A453 Grade 660 Screws are manufactured in tensile class A/B/C and D with different forms such as hex screws, socket head cap screws, allen screws, countersunk screws, set screws, etc. ASTM A453 grade 660 is chemically equivalent to ASTM A638 grade 660 stainless steel alloy, also known by alloy a286 and uns s66286. Boltport offers imperial and metric screws in ASTM a453 grade 660 material.

Grade 660 screws are used in bolting boilers, pressure vessels and valves and allied instruments, intended for high temperature service. Boltport can supply ASTM A453 grade 660 screws with NACE compliance.

Find information on ASTM A453 Grade 660 tensile class, chemical composition, mechanical properties, heat treatment, stress rupture testing, surface coatings and screws dimension standards.

For Quick quotation on A453 Grade 660 Screws please send us enquiry on info@boltport.com

ASTM A453 Grade 660 Tensile Class

ASTM A453 Grade 660 Chemical Compositon

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 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 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 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

Other ASTM A453 Grade 660 Products


Fastener Coatings

Grade 660 Screw Dimensions