ASTM A 453 GR 660 Class B Fasteners

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ASTM A 453 GR 660 Class B 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 B Fasteners, proudly based in Muscat, Oman. We cater to high-demand industrial markets throughout the Middle East and beyond. Our expertise lies in crafting fasteners designed for high-stress and elevated-temperature environments, all while strictly adhering to international quality standards. With our state-of-the-art manufacturing facilities, thorough inspection processes, and complete material traceability, we ensure consistent performance and reliability. Our commitment to customer satisfaction, technical know-how, and timely deliveries has made us a trusted partner for essential fastening solutions.

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ASTM A453 Grade 660 Class B Fasteners are crafted from a specialized precipitation-hardened iron–nickel–chromium alloy, enhanced with precise amounts of nickel, chromium, molybdenum, and aluminum. This unique composition grants them impressive tensile and yield strength, outstanding creep resistance, and robust oxidation resistance at high temperatures. Class B fasteners maintain stable hardness, exhibit good ductility, and provide reliable load-bearing capabilities even under prolonged thermal and mechanical stress. Their mechanical properties ensure they remain dimensionally stable, resist deformation, and enjoy a long service life in challenging operating conditions.

ASTM A 453 GR 660 Class B Fasteners Specifications

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

ASTM A 453 Gr 660 Heavy Hex B Fasteners, Gr 660 Class B Hex Fasteners, Gr 660 Lock B Fasteners, ASTM A453 Self Locking B Fasteners, ASTM A453 Grade 660 Class B Fasteners Stockist in Muscat, OMAN.

ASTM A 453 GR 660 Class B 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 B 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.

ASTM A453 Grade 660 Class B Fasteners find their place in a variety of high-temperature and high-pressure applications where strength and long-term reliability are crucial. You’ll commonly see them in steam and gas turbines, boilers, heat exchangers, pressure vessels, and power generation equipment. They’re also essential in petrochemical plants, refineries, and industrial process systems that face thermal cycling and vibration. These fasteners are perfect for critical joints that need to withstand creep and oxidation, making them a go-to choice for demanding environments.