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Mira Fasteners is a trusted manufacturer and supplier of ASTM A193 B8T Nuts, proudly based in Kuala Lumpur, Malaysia. These stainless steel nuts are specifically designed for tough environments that demand outstanding corrosion resistance and thermal stability, especially in welded structures. Catering to industries like petrochemical, power generation, food processing, and marine, Mira Fasteners guarantees that each nut is crafted to meet strict international standards, ensuring reliable quality and performance throughout Malaysia and Southeast Asia.
ASTM A193 B8T Nuts are constructed from AISI 321 stainless steel, a titanium-stabilized austenitic alloy that effectively resists intergranular corrosion, even after welding or exposure to high temperatures. These nuts boast a minimum tensile strength of 515 MPa and maintain their structural integrity under heat, making them perfect for systems that experience thermal cycling. The titanium content helps prevent carbide precipitation, boosting long-term corrosion resistance in harsh chemical and high-temperature settings.
| 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 B8T Nuts
| 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.
Typically, these nuts are used in bolted assemblies for heat exchangers, pressure vessels, flanged piping, and other high-temperature process equipment. Often paired with B8T bolts or stud bolts, they offer a secure and corrosion-resistant fastening solution for critical systems. Mira Fasteners provides ASTM A193 B8T Nuts in a range of sizes, thread types, and finishes to accommodate various application needs. Their blend of mechanical strength and resistance to heat and corrosion makes them a top choice for demanding industrial applications.
We provide complete documentation on our ASTM A193 B8T nuts, including 100% radiography test reports, raw material test reports, customer test reports, and heat treatment plans. This includes our packaging, fumigation certificates, marketing invoices, quality assurance systems, and raw materials. In addition, we issue manufacturer test certificates (MTC) under EN 10204/3.1B. Our ASTM A193 B8T nuts are packaged according to industry standards and manufactured to meet customer specifications, ensuring quality and complying with all required documentation.
Mira Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kuala lumpur, Malaysia, with over 8 years of experience serving global industries.
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