1. Chemical Composition Comparison
| Element | ASTM A139 | ASTM A252 (Gr.3) |
|---|---|---|
| Carbon (C) | ≤0.26% | ≤0.26% |
| Manganese (Mn) | ≤1.20% | ≤1.20% |
| Phosphorus (P) | ≤0.05% | ≤0.05% |
| Sulfur (S) | ≤0.05% | ≤0.05% |
| Silicon (Si) | ≤0.20% | ≤0.20% |
2. Mechanical Properties Comparison
| Parameter | ASTM A139 | ASTM A252 (Gr.3) |
|---|---|---|
| Yield Strength | ≥240 MPa | ≥241 MPa |
| Tensile Strength | ≥415 MPa | ≥455 MPa |
| Elongation | ≥24% | ≥20% |
3. Mechanical Performance Comparison
| Characteristic | ASTM A139 | ASTM A252 |
|---|---|---|
| Straightness Requirement | No special requirement | ≤0.25% of length |
| Inspection Standard | 100% hydrostatic test | 100% weld inspection |
| Temperature Range | -30℃~+80℃ | -20℃~+50℃ |
4. Application Differences
ASTM A139: Fluid transmission pipelines, building structural supports, mechanical manufacturing
ASTM A252: Pile foundation engineering, excavation support, port terminal structures
A252 pile pipes Factory
