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Punit Fasteners is a reputable manufacturer and supplier of ASTM A193 B8 Class 2 Fasteners, proudly based in Delhi, India. We prioritize high-quality engineering and strictly follow international standards, ensuring that our fasteners are top-notch and perfect for critical industrial applications. Our ASTM A193 B8 CL2 Fasteners are crafted from austenitic stainless steel, making them ideal for high-temperature and high-pressure environments. Each product goes through thorough quality checks and heat treatment processes to guarantee outstanding performance, corrosion resistance, and long-lasting durability. With a commitment to excellence, timely delivery, and customer satisfaction, we proudly serve clients both in India and around the globe.
Our ASTM A193 B8 Class 2 Fasteners are made from AISI 304 stainless steel, which is carbide solution treated and strain-hardened to boost strength. These fasteners offer enhanced mechanical properties compared to Class 1, featuring a minimum tensile strength of 125 ksi (860 MPa) and a yield strength of 100 ksi (690 MPa). They also retain good ductility and exceptional corrosion resistance across a variety of chemical and atmospheric conditions. Their non-magnetic properties, high oxidation resistance, and robust mechanical integrity make them perfect for challenging environments.
| Element | B7 | B8 CL2 | B8 CL2M |
| 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% |
| 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 CL2 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2 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 | |
| B8 CL2M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 CL2 Fasteners
|
IS
BS
ASTM
|
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160
|
3 mm to 200 mm
|
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.
You’ll find ASTM A193 B8 CL2 Fasteners widely used in industries like petrochemical, oil and gas, power generation, heat exchangers, and pressure vessels. They’re particularly well-suited for flanged joints, pipe systems, valves, and structural assemblies that face high temperatures and corrosive conditions. Their strength and resistance to corrosion make them especially reliable for offshore drilling platforms, marine structures, and chemical processing equipment. Plus, their impressive performance under thermal stress and mechanical loads ensures they can be counted on in critical service environments where both strength and durability are essential.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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