EN-8D Bright Bar is a medium-carbon engineering steel known for its combination of strength, toughness, machinability, and durability. It is commonly supplied in cold-drawn condition, providing a smooth surface finish, improved dimensional accuracy, and close tolerances compared with conventional hot-rolled bars.
EN-8D, also identified with grades such as 080A40 and 45C8, contains approximately 0.40% to 0.45% carbon and 0.70% to 0.90% manganese. Its balanced chemical composition makes it suitable for components that require reliable mechanical performance and the ability to undergo machining and heat treatment.
The bright bar offers good machinability and can be heat treated to achieve higher hardness, strength, and wear resistance where required. It is widely used for manufacturing shafts, axles, gears, studs, bolts, spindles, crane wheels, and other engineering and automotive components.
Key Features
- Medium-carbon engineering steel
- Smooth and bright surface finish
- Excellent dimensional accuracy
- Good machinability
- High strength and toughness
- Suitable for forging and heat treatment
- Good wear resistance after hardening
- Available in round, hexagonal, and other profiles depending on requirements





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