EN1A Carbon Steel Round Bar (UNS G12144)
EN1A Round Bar is a free-cutting low carbon steel renowned for its exceptional machinability and smooth surface finish. Identified internationally as UNS G12144, EN1A contains added sulfur to enhance chip breaking, making it one of the most preferred materials for high-speed machining and automatic turning operations. It is typically supplied in bright drawn condition and is not intended for heat treatment.
Key Features
- Outstanding machinability and tool life
- Excellent surface finish after machining
- Consistent dimensional accuracy
- Ideal for automatic and CNC turning
- Economical choice for mass-produced components
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| BS | EN1A |
| DIN | 11SMn30 |
| ASTM / SAE | AISI 1215 |
| JIS | SUM23 |
| IS | IS 1875 |
Sizes
- Diameter: 5 mm to 100 mm
- Length: 3 m, 6 m, or cut-to-length
- Custom sizes available on request
EN1A Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.07 – 0.15 |
| Manganese (Mn) | 0.90 – 1.30 |
| Sulfur (S) | 0.20 – 0.35 |
| Phosphorus (P) | ≤ 0.07 |
| Silicon (Si) | ≤ 0.10 |
UNS G12144 Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 370 – 480 MPa |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 10% |
| Hardness | 110 – 170 HB |
EN1A Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1460°C |
| Thermal Conductivity | 51 W/m·K |
| Modulus of Elasticity | 210 GPa |
Type of EN1A Carbon Steel Round Bar
- Bright Round Bar
- Polished Round Bar
- Cold Drawn Round Bar
Applications
- Precision turned components
- Screws, nuts, and bolts
- Bushes, pins, and fittings
- CNC machined parts
- Electrical and automotive small components
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