Home > ASTM A193 B8 CL4 Fasteners
Majid Fasteners is a business enterprise that produces and supplies ASTM A193 B8 Class 4 fasteners in Dubai, UAE, which have high-performance stainless steel fasteners designed to handle the challenging industrial fastening needs. These fasteners are made in superior strength, durability and corrosion resistant designs making them attractive in extreme operating conditions. Majid Fasteners produces products of international standards, as it has advanced manufacturing knowledge, high quality assurance and dependable supply capacities. Trusted in the oil and gas, power generation, petrochemical, and marine industries are some of the industries with which we serve faithfully.
Fasteners made of ASTM A193 B8 Class 4 are engineered specifically for cases that experience severe levels of mechanical stress, high levels of corrosion protection, and comprehensive reliability in extreme operational scenarios. The numerous applications of B8 class 4 fasteners occur throughout the world in Oil & Gas Refining, Petrochemical Plants, and Power Generation Equipment where very high temperatures and pressures are a consistent event in many equipment applications. Examples of equipment locations and types that B8 class 4 fasteners excel are; Boilers; Flanges; Pressure Vessels; Heat Exchangers; and High-Temperature Pipe Systems. Additionally, due to the strength and durability, B8 class 4 fasteners are also found in Marine Environments, Offshore Structures, and Chemical Process Equipment where corrosion is a concern. The B8 class 4 fastener is trusted in many industries as the preferred fastening solution for long-term and secure fastening in high-risk or critical application scenarios.
|
Material |
Specification |
Standards |
Size |
Length |
|
ASTM A193 B8 CL4 Fasteners |
IS BS ASTM |
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160 |
3 mm to 200 mm |
| Element | B8 CL4 | B8 CL4 | B8M CL4 |
| 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% |






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.