ASTM A 453 GR 660 Class D Fasteners

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The Fasteners Mart in Mumbai, India, is a prominent manufacturer and exporter of high-grade industrial fasteners, relying on precision and quality by clients in different industries. Among their best products are ASTM A453 Grade 660 Class D Fasteners, which are produced using high-strength austenitic stainless steel. These fasteners come in various shapes such as bolts, nuts, washers, screws, and stud bolts. Designed for high-temperature and high-pressure applications, this grade provides better mechanical strength and oxidation resistance and is well suited for challenging applications in power generation, aerospace, and petrochemical processes.

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ASTM A453 GR 660 Class D Fasteners consist mainly of Iron, Nickel (24–27%), Chromium (13–17%), Molybdenum (1–1.5%), and small amounts of Titanium and Aluminum for increased strength and heat resistance. These fasteners provide superior mechanical performance with a tensile strength of minimum 895 MPa, yield strength of 585 MPa, and 15% elongation. They have a density of approximately 7.9 g/cm³ and retain their characteristics in temperatures up to 704°C. These characteristics render them best suited for high-stress, thermally demanding environments with a need for uninterrupted performance.

ASTM A 453 GR 660 Class D Fasteners Specifications

Material	Dimensions	Standards	Size	Length
ASTM A453 GR 660 CLASS D Fasteners	ASME B18.2.1, B18.3	ASTM, ASME	M 02 to M 160	3 mm to 200 mm

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ASTM A 453 GR 660 Class D Fasteners Chemical Composition

Element	Content
Carbon	0.08 max
Manganese	2.00 max
Phosphorus, max	0.040 max
Sulfur, max	0.030 max
Silicon	1.00 max
Nickel	24.0-27.0
Chromium	13.5-16.0
Molybdenum	1.00-1.50
Tungsten	–
Titanium	1.9-2.35
Aluminum	0.35 max
Vanadium	0.10-0.50
Boron	0.001-0.010

ASTM A 453 GR 660 Class D Fasteners Mechanical Properties

Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa)	895 min
Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa)	585 min
Elongation in 4D (El)	15
Reduction	18

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ASTM A453 GR 660 Class D Fasteners find extensive application in power generation, aerospace, oil & gas, chemical processing, and marine engineering industries. Their high heat resistance and strength qualify them for use in gas turbines, pressure vessels, exhaust systems, and heat exchangers. They are particularly useful in high-temperature and pressure-exposed systems where material reliability is of prime importance. Their superior oxidation and creep resistance guarantees long-term performance under harsh and thermally stressing environments with minimized risk of mechanical failure.

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Types of ASTM A 453 GR 660 Class D Fasteners

Fasteners Mart ensures fast and secure shipment of ASTM A453 GR 660 Class D Fasteners within local and foreign markets. The products are wrapped with strong packaging materials like wooden crates, bubble wraps, and corrugated boxes to secure transit. Personalized packaging can be arranged at customers’ request according to particular project requirements.