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Punit Fasteners, a reputable manufacturer and supplier located in Delhi, India, specializes in high-quality ASTM A193 B8 Bolts that are built for exceptional strength, durability, and resistance to corrosion. These bolts find their place in various industries, including petrochemical, construction, power generation, and marine, where reliable fastening is crucial, especially in high-pressure, high-temperature, and corrosive environments. Crafted from austenitic stainless steel similar to Type 304, ASTM A193 B8 Bolts adhere to international standards, ensuring they deliver reliable performance for critical bolting tasks. Punit Fasteners is committed to precision engineering and longevity, making these bolts a top choice for both industrial and structural projects.
Made from a stainless steel alloy that contains around 18–20% chromium and 8–10.5% nickel, ASTM A193 B8 Bolts boast excellent corrosion resistance, impressive tensile strength, and the ability to withstand oxidation at high temperatures. With a tensile strength ranging from 515–860 MPa, they maintain their structural integrity across various environments. Their austenitic structure also lends them toughness and ductility, making them ideal for situations where both corrosion resistance and mechanical reliability are paramount.
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 Bolt
|
IS
BS
ASTM
|
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160
|
3 mm to 200 mm
|
| 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 |
| 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% |
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.
ASTM A193 B8 bolts are widely used in high-pressure and high-temperature applications. They are commonly found in chemical processing, petrochemical industries, power generation, and marine environments. Their corrosion resistance and strength make them ideal for critical components like flanges, valves, and pumps. These bolts are essential for ensuring structural integrity and reliability in harsh conditions, making them a preferred choice for safety and durability in industrial settings.
These bolts are widely utilized in industries that demand strong and corrosion-resistant fasteners. In petrochemical plants and refineries, they are essential for flanges, valves, boilers, and heat exchangers that face harsh chemicals and elevated temperatures. The construction industry uses them for infrastructure and structural connections, while the marine sector counts on their resilience in salty and humid conditions. With their dependable fastening capabilities, these bolts ensure secure assemblies in challenging industrial settings where standard steels simply can’t cope with corrosion and extreme temperatures.
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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