ASTM A 453 GR 660 Class B Bolts

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ASTM A 453 GR 660 Class B Bolts Manufacturer and Supplier in Tunis, Tunisia

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Lina Fasteners is a well-respected manufacturer and supplier based in Tunis, Tunisia, specializing in high-performance ASTM A453 Grade 660 Class B Bolts designed for tough industrial applications. Thanks to their advanced manufacturing techniques and rigorous quality control, the company guarantees consistent quality, precise dimensions, and adherence to international standards. These bolts are specifically engineered to withstand high temperatures and intense stress, providing exceptional strength, reliability, and durability. With a strong focus on technical excellence and prompt delivery, Lina Fasteners has become a trusted partner for essential fastening needs across a variety of industries.

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The ASTM A453 Grade 660 Class B bolts are crafted from a precipitation-hardening iron-nickel-chromium alloy that contains about 24–27% nickel and 13–16% chromium, along with small amounts of molybdenum, titanium, aluminum, and controlled carbon. This unique blend results in high tensile and yield strength, good ductility, and outstanding toughness. Mechanically, Class B bolts are known for their impressive creep resistance, stress-rupture strength, and oxidation resistance, allowing them to maintain their mechanical integrity and stability even under prolonged exposure to high temperatures and heavy loads.

ASTM A 453 GR 660 Class B Bolts Specifications

Material	Dimensions	Standards	Size	Length
ASTM A453 GR 660 CLASS B Bolts	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 B Bolts 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 Bolts 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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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.

These ASTM A453 GR 660 Class B Bolts are commonly used in environments that experience high temperatures and significant mechanical stress. Typical applications include gas and steam turbines, boilers, heat exchangers, and power generation equipment. They are also found in petrochemical plants, refineries, and chemical processing facilities where resistance to oxidation, scaling, and thermal fatigue is crucial. These bolts ensure secure joint integrity, a long service life, and dependable performance in critical industrial settings.

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Types of ASTM A 453 GR 660 Class B Bolts

At Lina Fasteners ASTM A 453 GR 660 Class B Bolts are carefully fastened for quality and protection during movement. Each bolt is securely wrapped with protective coatings to prevent corrosion. They are packaged in sturdy waterproof boxes or boxes labeled for easy identification and handling. Customized packaging is available to meet specific requirements, ensuring a safe and convenient delivery to our customers in Tunis, the Tunisia, and beyond.