ASTM A193 B8C Bolts

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ASTM A193 B8C Bolts are premium stainless steel fasteners engineered for demanding industrial applications where strength, corrosion resistance, and reliability are critical. Manufactured from high-carbon austenitic stainless steel, typically Grade 304, these bolts provide enhanced tensile and proof strength while maintaining excellent corrosion resistance. Ideal for high-pressure, high-temperature, and chemically aggressive environments, B8C Bolts are widely used in petrochemical plants, refineries, power generation units, and marine applications. With precision manufacturing and stringent quality control, ASTM A193 B8C Bolts ensure long-lasting performance, safe and secure connections, and dependable operation in critical industrial systems.

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ASTM A193 B8C Bolts are made from high-carbon austenitic stainless steel, typically Grade 304, alloyed with chromium and nickel to provide corrosion and oxidation resistance. The increased carbon content enhances tensile strength, proof load, and hardness, making these bolts suitable for high-stress and high-temperature applications. They exhibit excellent ductility, toughness, and resistance to stress corrosion cracking. Their mechanical properties remain stable under cyclic loading and thermal fluctuations, making B8C Bolts ideal for critical industrial environments where reliable, high-strength fasteners are required for secure assemblies.

ASTM A193 B8C Bolts Chemical Composition

Element	B7	B8	B8M
Carbon	0.37 – 0.49%	0.08% max	0.08% max
Manganese	0.65 – 1.10%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.030%	0.030%
Silicon	0.15 – 0.35%	1.00% max	1.00% max
Chromium	0.75 – 1.20%	18.0 – 20.0%	16.0 – 18.0%
Nickel		8.0 – 11.0%	10.0 – 14.0%
Molybdenum	0.15 – 0.25%		2.00 – 3.00%

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ASTM A193 B8C Bolts Mechanical Properties

Grade	Size	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min
B7	Up to 2-1/2	125	105	16	50
	2-5/8 – 4	115	95	16	50
	4-1/8 – 7	100	75	18	50
B8 Class 1	All	75	30	30	50
B8M Class 1	All	75	30	30	50
B8 Class 2	Up to 3/4	125	100	12	35
	7/8 – 1	115	80	15	35
	1-1/8 – 1-1/4	105	65	20	35
	1-3/8 – 1-1/2	100	50	28	45
B8M Class 2	Up to 3/4	110	95	15	45
	7/8 – 1	100	80	20	45
	1-1/8 – 1-1/4	95	65	25	45
	1-3/8 – 1-1/2	90	50	30	45

ASTM A193 B8C Bolts Specifications

Material	Specification	Standards	Size	Length
ASTM A193 B8C Bolt	IS BS ASTM	DIN, ISO, JIS, GB, IS, BS, ASTM	M 02 to M 160	3 mm to 200 mm

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ASTM A193 B8C Bolts are extensively used in industries that demand corrosion-resistant, high-strength, and reliable fasteners. They are ideal for high-pressure piping, flanged joints, pressure vessels, boilers, heat exchangers, and valve assemblies in petrochemical, chemical processing, and power generation facilities. Their mechanical strength and corrosion resistance make them suitable for marine and offshore applications, as well as food, pharmaceutical, and water treatment equipment. Paired with B8C nuts or stud bolts, these bolts provide secure, long-lasting fastening in high-temperature, high-pressure, and chemically aggressive environments, ensuring safe and durable operation in critical industrial applications.

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Types of ASTM A193 B8C Bolts

At Rinku Fasteners, we prioritize the secure and efficient packaging of ASTM A193 B8C bolts to ensure their safe delivery and optimal condition upon arrival. Each bolt is carefully packed in high-quality, durable containers that protect against damage and contamination. Our packaging includes clear labeling for easy identification and handling. We offer customized packaging solutions to meet specific client needs, ensuring that every order arrives intact and ready for use in demanding industrial applications.