What is Q275 Steel?
Q275 steel is a carbon structural steel with carbon structural steel. This comprehensive guide covers chemical composition, mechanical properties, and machining characteristics per GB/T standards.
Chemical Composition
| Element | Content (%) | Standard |
|---|---|---|
| C | ≤0.24 | ASTM/GB |
| Mn | ≤1.40 | ASTM/GB |
| P | ≤0.045 | ASTM/GB |
| S | ≤0.050 | ASTM/GB |
| Si | ≤0.35 | ASTM/GB |
| Fe | Balance | ASTM/GB |
Mechanical Properties
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥490 MPa | GB/T 699 |
| Yield Strength | ≥275 MPa | GB/T 699 |
| Elongation (in 50mm) | ≥20% | GB/T 699 |
| Hardness (Vickers) | 140 HV | GB/T 4340 |
| Density | 7.85 g/cm³ | At 20°C |
Key Features
- Good mechanical properties for structural applications
- Suitable for heat treatment
- Good machinability in annealed condition
- Widely used in construction and manufacturing
- Cost-effective carbon steel
Common Applications
- Structural components and frames
- Machine parts and shafts
- Bolts and fasteners
- Automotive components
- Construction equipment
Machinability
Q275 steel has good machinability. Recommended: Carbide tools, cutting speed 100-180 m/min, feed 0.15-0.35 mm/rev, soluble oil coolant.
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