ASTM A193 B8 CL3 Stud Bolts

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ASTM A193 B8 Class 3 stud bolts from Hazlewood Fasteners in Canberra, Australia, are engineered for industries where exceptional strength, corrosion resilience, and thermal endurance are non-negotiable. Crafted from solution-annealed and strain-hardened 304 stainless steel, these stud bolts exhibit elevated tensile properties and steadfast structural reliability, making them ideal for corrosive chemical plants, steam systems, and high-temperature industrial units. Designed to perform under fluctuating heat, pressure, and aggressive process media, our B8 Class 3 stud bolts deliver dependable clamping force and long-term fastening stability. When precision and durability determine success, these fasteners rise as the trusted industrial benchmark.

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ASTM A193 B8 Class 3 stud bolts are manufactured from high-integrity solution-annealed and strain-hardened 304 stainless steel with elevated chromium and nickel content. This advanced metallurgy enhances corrosion resistance, tensile strength, and fatigue tolerance in demanding environments. With superior yield strength, stable preload retention, and strong ductility under dynamic thermal and mechanical stresses, these stud bolts maintain thread precision and long-term performance. Their resistance to oxidation, chloride attack, and chemical degradation ensures enduring mechanical integrity in harsh service conditions.

ASTM A193 B8 CL3 Stud 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 CL3 Stud 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

ASTM A193 B8 CL3 Stud Bolts Specifications

Material	Specification	Standards	Size	Length
ASTM A193 B8 CL3 StudBolt	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 Class 3 stud bolts excel in applications requiring robust fastening under corrosive, high-temperature, and high-pressure exposure. They are widely used in petrochemical units, refineries, steam distribution systems, power generation plants, desalination facilities, food-grade processing equipment, and marine environments. Ideal for securing heat-exchanger flanges, pumps, boiler systems, valve assemblies, chemical tanks, and pressure-rated piping, they deliver unwavering fastening strength and leak-proof joint security. Where plant safety, equipment reliability, and long-term fastening endurance are paramount, B8 Class 3 stud bolts prove indispensable.

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Types of ASTM A193 B8 CL3 Stud Bolts

At Hazlewood Fasteners, ASTM A193 B8 CL3 stud bolts are meticulously packaged to ensure optimal protection during transit and storage. Each bolt is individually wrapped in anti-corrosive material and securely placed in durable, custom-sized boxes to prevent damage. The packaging is clearly labeled with product specifications and handling instructions for easy identification. Our commitment to careful packaging helps maintain the integrity and quality of the fasteners, ensuring they arrive in perfect condition and ready for use.