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Ramu Fasteners stands out as a trusted manufacturer and supplier of ASTM A193 B8M Bolts based in Hyderabad, delivering top-notch fastening solutions designed for corrosive and high-temperature industrial settings. With state-of-the-art manufacturing facilities and rigorous quality control processes, the company guarantees exceptional dimensional accuracy, strength, and reliable performance. Ramu Fasteners offers B8M bolts in a variety of sizes, thread standards, and finishes to comply with international specifications. Renowned for their outstanding corrosion resistance and durability, ASTM A193 B8M bolts are extensively utilized in critical piping systems, pressure vessels, and flange connections.
ASTM A193 Grade B8M bolts are crafted from austenitic stainless steel, which is equivalent to Type 316 stainless steel. This alloy is enriched with chromium, nickel, and molybdenum, enhancing its resistance to pitting and crevice corrosion, particularly in environments rich in chlorides. B8M bolts boast impressive tensile and yield strength, along with excellent ductility and toughness. They maintain their mechanical stability even at elevated temperatures and offer dependable resistance to oxidation, corrosion, and stress corrosion cracking under demanding service conditions.
| 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% |
| 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 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8M Bolt
|
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.
ASTM A193 B8M bolts are used in a variety of complex applications where high strength and resistance to extreme conditions are critical. Commonly found in the petrochemical, aerospace and electrical industries, these bolts are ideal for hot environments and high pressure. They are employed in gas and oil pipelines, industrial equipment and medical devices. Their corrosion resistance and durability make them suitable for critical assemblies that require reliable and durable packaging.
ASTM A193 B8M Bolts are frequently employed in scenarios that demand superior corrosion resistance and high-temperature performance. Common applications include chemical processing plants, offshore oil and gas facilities, desalination units, and marine environments. They are widely utilized in pressure vessels, pipelines, heat exchangers, valves, and flanged joints. Their capability to endure aggressive chemicals and saline conditions makes them perfect for coastal and industrial settings. B8M bolts provide secure fastening, minimize maintenance needs, and ensure long-term reliability in critical industrial and energy-sector applications.
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