ASTM A453 Grade 660 Class A Bolts, A286, Square, Hex Bolts, Hex Cap Screws, Lag Screws, Hex Socket and Spline Socket Screws, Studs, Stud Bolts, Threaded Rod, DIN 2510/939/940, ASME B18.2.1, B18.3, B1.1 Inch Unified Threads

ASTM A453 Grade 660 Class A Bolts, A286, Square, Hex Bolts, Hex Cap Screws, Lag Screws, Hex Socket and Spline Socket Screws, Studs, Stud Bolts, Threaded Rod, DIN 2510/939/940, ASME B18.2.1, B18.3, B1.1 Inch Unified Threads

£0.20

£0.2-£2100

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ASTM A453 Grade 660 Class A bolts are Iron Based Super Alloy bolts manufactured from iron-nickel-chromium alloy with additions of molybdenum and titanium. A453 660 Class A Bolts maintain good strength and oxidation resistance at temperatures up to 1300ºF. Torqbolt is a prominent A453 gr 660 Class A bolt supplier in India.

A286 Stainless Steel

Precipitation Hardening Steel

Solution Annealed and Precipitation Hardened

– Finish: Pickling and Passivation

– Compatible Fasteners: A453 Grade 660 Class A Nut | A-286 Washers

– Marking: TorqBolt | BEA 660A

– Type: Cold Forged, Hot Forged, Bar Stock Machined

000

Product Features

DimensionsASME B18.2.1, B18.3
ThreadsUnless otherwise specified, the threads shall be rolled or cut at the option of TorqBolt
Threads ConfigurationASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads
Melt OriginEast Europe/South America/Korea/Japan
Product OriginMade in India
CertificationDual Certified As per ASTM & ASME Codes
Additional CertificationsPED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Additional RequirementsNACE MR0103/MR0175/ISO 15156 Compliance
Mandatory RequirementsFree from Mercury & Radioactive Contamination

ASTM A453 660 Class A Bolts Specification

ASTM A453 Grade 660 Class A Bolts, Screws, Nuts and Studs contain 24% Nickel and 13.5% Chromium with addition of 1.80 up to 2.10 percentage of Titanium to add toughness for use at high temperatures. The Co-efficient of expansion of A453 gr 660A bolts is comparable to austenite stainless steels. A453 660 Cl A is the most common grade used in conjunction with Grades B,C & D. A453 Grade 660 Class A Bolting’s are heated up to 900 degrees Celsius with a holding time of 2 hours followed by liquid quenching and age hardened once to achieve the desired tensile stress & yield strength. Unlike Gr 660 Class d Bolts, Class A Bolts require stress-rupture test at 650 degrees Celsius with a minimum stress of 385 Mpa for at least 100 hours. The maximum permissible hardness for 660 A Bolting is 37 HRC.

Finishing Process for ASTM A453 Gr 660A Stud Bolts, Bolts, Screws Threads for studs, screws and bolts made of A453 Gr 660A can be formed by machining or rolling from Pitch Diameter. Keeping the heat treatment condition of A453 Grade 660A, Threads may be formed after precipitation hardening or after solution annealing but prior to precipitation age hardening.

The following Type designations of A453 660A Studs & Bolts are as follows:
  • Type M1—threads formed by machining after Precipitation Hardening.
  • Type M2—threads formed by machining after solution annealing but prior to precipitation hardening.
  • Type R1—threads formed by rolling after precipitation hardening.
  • Type R2—threads formed by rolling after solution annealing but prior to precipitation hardening.

ASTM A453 Grade 660 Class A Bolts Properties

ChemicalMechanicalHeat Treatment

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ADDITIONAL INFORMATION

TorqBolt is a well known stockist of Pitch Dia ASTM A453 Grade 660 Class A Round Bars from ¼”-4” & 6mm – 100mm in 1 meter, 3 meter & 6 Meter lengths. All Threaded Bars are Magnetic Particle Examined in accordance with ASTM E 709 with Indications & Cracks within 3% of The Diameter as specified in ASTM A453 Specification . ATI A286 is a registered trademark of ATI Metals.

Surface Discontinuity: ASTM A193 / A320 / F593 / F594 / A638 Bolts, Nuts & threaded rods are manufactured in accordance with surface discontinuities acceptable as per ASTM F788/F788M Specification.