Majid Fasteners, based in Dubai, UAE, is a leading manufacturer and supplier of high-quality industrial fasteners, specializing in ASTM A193 B8M nuts. Renowned for precision engineering and durability, their products cater to diverse sectors, including oil and gas, construction, and petrochemicals. With a strong focus on quality, Majid Fasteners ensures that each B8M nut meets stringent international standards, offering excellent corrosion resistance and mechanical strength. Backed by advanced manufacturing processes and a customer-centric approach, they deliver reliable solutions that enhance operational efficiency. Trusted locally and internationally, Majid Fasteners stands as a benchmark for excellence in fastener supply.
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What is ASTM A193 B8M Nuts?
ASTM A193 B8M nuts are high-strength stainless steel fasteners primarily composed of AISI 316 stainless steel, containing 16–18% chromium, 10–14% nickel, 2–3% molybdenum, and minimal carbon. This composition ensures excellent corrosion resistance, especially in marine and chemical environments. Mechanically, these nuts exhibit high tensile strength (minimum 750 MPa) and yield strength (minimum 450 MPa), with good hardness and durability under extreme conditions. Designed for critical applications in pressure vessels, pipelines, and structural connections, B8M nuts provide reliable performance, longevity, and safety in demanding industrial environments.
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ASTM A193 B8M Nuts Specifications
Material | Specification | Standards | Size | Length |
ASTM A193 B8M Nuts | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
ASTM A193 B8M Nuts Chemical Composition
| ASTM A193 B8M Nuts | Manganese, max | Phosphorus, max | Sulfur, max | Silicon | Chromium |
|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 |
ASTM A193 B8M Nuts 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 |
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ASTM A193 B8M Nuts Uses
ASTM A193 B8M nuts are widely used in industries requiring high-strength and corrosion-resistant fasteners. Commonly applied in oil and gas, petrochemical, chemical processing, and marine environments, they are ideal for high-pressure and high-temperature applications. These nuts are often paired with B8M bolts and studs for secure connections in pressure vessels, boilers, pipelines, and flanges. Their superior resistance to oxidation and chemical corrosion makes them suitable for offshore platforms, desalination plants, and power generation units. Engineered for reliability, B8M nuts ensure structural integrity, safety, and long-term performance in critical industrial operations.






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