EN8 Carbon Steel Round Bar (UNS G10450)
EN8 Round Bar is a medium carbon steel grade widely used in mechanical and structural engineering due to its excellent strength, toughness, and wear resistance. Internationally identified as UNS G10450, EN8 typically contains around 0.40–0.45% carbon, making it suitable for components subjected to moderate to high stresses. It offers better mechanical properties than EN1A and is commonly supplied in hot rolled or normalized condition.
Key Features
- Medium carbon steel with high tensile strength
- Good toughness and shock resistance
- Excellent machinability in normalized condition
- Suitable for induction hardening and heat treatment
- Reliable performance for engineering applications
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| BS | EN8 |
| EN | C45 / 1.0503 |
| DIN | CK45 |
| ASTM / SAE | AISI 1045 |
| JIS | S45C |
| IS | EN8 |
Sizes
- Diameter: 10 mm to 600 mm
- Length: 3 m, 6 m, or cut-to-length
- Custom sizes available on request
EN8 Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.40 – 0.45 |
| Manganese (Mn) | 0.60 – 1.00 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.045 |
UNS G10450 Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 550 – 700 MPa |
| Yield Strength | ≥ 320 MPa |
| Elongation | ≥ 16% |
| Hardness | 170 – 210 HB (Normalized) |
EN8 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1460°C |
| Thermal Conductivity | 49 W/m·K |
| Modulus of Elasticity | 210 GPa |
Types
- Hot Rolled Round Bar
- Bright Drawn Round Bar
- Forged Round Bar
- Turned & Polished Round Bar
- Heat Treated Round Bar
Applications
- Shafts and axles
- Gears and pinions
- Bolts, studs, and crankshafts
- Automotive and machinery components
- Structural and mechanical fabrication
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