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Brian Fasteners, a Houston-based, USA-based established manufacturer and supplier of high-performance ASTM A193 B8M bolts, is a renowned company for providing precision-engineered fastening solutions. With an emphasis on quality, durability, and international standard compliances, the company caters to diverse industries. Having state-of-the-art facilities and striving for excellence, Brian Fasteners provides every bolt with the stringent demands of corrosive and high-pressure conditions. Their ASTM A193 B8M bolts have earned widespread fame as reliable and superior performers, and thus Brian Fasteners become a go-to supplier for demanding applications in construction, petrochemical, and energy industries.
ASTM A193 B8M bolts are constructed from austenitic stainless steel, Alloy Type 316, which contains chromium, nickel, and molybdenum for increased resistance to corrosion. They have superior mechanical properties like high tensile strength, ductility, and crevice and pitting corrosion resistance. These bolts retain their strength and integrity at both low and high temperatures and are therefore suitable for harsh environments. Their mechanical properties meet ASTM specifications to provide consistent performance under pressure and stress, particularly in marine and chemical processing where material durability is important.
| 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 find extensive application in industries that call for high corrosion resistance, especially in extreme conditions. They are typically found in chemical processing plants, oil and gas refineries, marine and offshore structures, and power generation plants. Their molybdenum-enriched stainless steel content makes them suitable for application in chloride-containing environments and at high temperatures. These bolts are usually used in pressure vessels, heat exchangers, and flanged piping systems where reliability and safety are their top priority. They are of high strength, superior durability, and environmental degradation resistance that guarantees effective long-term performance in critical infrastructure and industrial systems.
Sheetal fasteners contain careful packages of ASTM A193 B8M bolts to ensure safe delivery and optimal quality. Each bolt is individually inspected and carefully wrapped to prevent damage during transport. We use durable protective coatings and fasteners to keep the bolt intact. Custom packaging is available to meet specific needs. Our commitment to quality extends through our packaging, ensuring that your fasteners arrive in perfect condition, ready for immediate use.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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