ASTM A193 B8 CL2 Bolts

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ASTM A193 B8 CL2 Bolts are premium stainless steel fasteners engineered for demanding industrial environments. Manufactured from austenitic stainless steel in a Class 2 strain-hardened condition, these bolts offer enhanced strength and corrosion resistance compared to standard B8 bolts. Ideal for high-pressure and high-temperature applications, they are widely trusted in chemical processing, petrochemical, power generation, and marine industries. Rinku Fasteners ensures precision engineering and strict quality control for every bolt, providing reliable performance and long-term durability. Their consistent quality and mechanical reliability make ASTM A193 B8 CL2 Bolts an essential choice for critical operations and secure industrial connections.

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ASTM A193 B8 CL2 Bolts are made from austenitic stainless steel, typically Grade 304, alloyed with chromium and nickel for corrosion resistance and oxidation stability. The Class 2 strain-hardening process increases tensile and yield strength while maintaining excellent ductility and toughness. These bolts exhibit reliable mechanical properties under elevated temperatures, stress, and cyclic loading. They resist stress corrosion cracking and oxidation, ensuring consistent performance in harsh and chemically aggressive environments. Their balanced combination of strength, hardness, and corrosion resistance makes them ideal for demanding industrial fastening applications.

ASTM A193 B8 CL2 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 B8 CL2 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 B8 CL2 Bolts Specifications

Material	Specification	Standards	Size	Length
ASTM A193 B8 CL2 Hex 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 B8 CL2 Bolts are widely used in industries requiring high corrosion resistance and superior mechanical strength. Common applications include pressure vessels, boilers, heat exchangers, flanged piping, and high-pressure joints in power plants and petrochemical facilities. Chemical processing industries depend on them for equipment exposed to corrosive fluids, while marine and offshore applications benefit from their resistance to saltwater and harsh atmospheric conditions. They are also suitable for water treatment, pharmaceutical, and food processing equipment due to their hygienic, non-reactive properties. These bolts provide long-term durability, secure fastening, and reliable performance in critical industrial systems.

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Types of ASTM A193 B8 CL2 Bolts

We ensure that our ASTM A193 B8 CL2 bolts are packaged with the utmost care to maintain their quality and integrity. Each bolt is individually inspected and then securely packed in durable, corrosion-resistant containers. Our packaging is designed to protect the bolts during transit and storage, preventing any damage or contamination. Whether you need small or large quantities, we offer flexible packaging solutions to meet your specific requirements, ensuring your bolts arrive in perfect condition.