ASTM A 453 GR 660 Class A Fasteners

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ASTM A 453 GR 660 Class A Fasteners Manufacturer and Supplier in Muscat, OMAN

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Mazin Fasteners is a reliable manufacturer and supplier of ASTM A453 Grade 660 Class A Fasteners, proudly based in Muscat, Oman. We cater to high-performance industrial needs both regionally and internationally. Known for our precision manufacturing and strict quality assurance, we adhere to global standards. With state-of-the-art facilities and a skilled team, Mazin Fasteners produces fasteners designed for high-temperature and high-stress applications. Our dedication to material traceability, consistent quality, and dependable delivery makes us a trusted partner for critical projects in the power, petrochemical, and heavy engineering industries.

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ASTM A453 Grade 660 Class A Fasteners are crafted from a precipitation-hardened iron–nickel–chromium alloy, with carefully controlled amounts of nickel, chromium, molybdenum, and aluminum. This unique blend gives them impressive tensile and yield strength, along with good ductility and oxidation resistance at high temperatures. Class A fasteners maintain stable hardness and reliable creep resistance, even under prolonged thermal exposure. Their mechanical properties guarantee dimensional stability, consistent load-bearing capabilities, and a long service life in challenging operating conditions.

ASTM A 453 GR 660 Class A Fasteners Specifications

Material	Dimensions	Standards	Size	Length
ASTM A453 GR 660 CLASS A 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 A 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 A 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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Commited to High Quality Service

To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.

You’ll find ASTM A453 Grade 660 Class A Fasteners in a variety of applications that demand reliable performance at elevated temperatures and moderate to high stress. They’re commonly used in boilers, heat exchangers, steam and gas turbines, pressure vessels, and power generation equipment. Additionally, these fasteners are essential in petrochemical plants, refineries, and industrial processing systems that experience thermal cycling and vibration. They’re perfect for structural and pressure-retaining assemblies where strength and oxidation resistance are crucial.

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Types of ASTM A 453 GR 660 Class A Fasteners

At Mazin Fasteners, our ASTM A 453 GR 660 Class A Fasteners are meticulously packaged to ensure they arrive in optimal condition. Each fastener is individually inspected and packaged in durable, protective materials to prevent damage during transit. Our packaging includes clear labeling and handling instructions to ensure ease of use and compliance with safety standards. We offer various packaging options, including bulk and custom-sized packages, tailored to meet our clients’ specific needs and preferences.