1. Chemical Composition Comparison
| Element | ASTM A106 (Gr.B) | ASTM A252 (Gr.3) |
|---|---|---|
| Carbon (C) | 0.17-0.24% | ≤0.26% |
| Silicon (Si) | 0.17-0.37% | ≤0.20% |
| Manganese (Mn) | 0.35-0.65% | ≤1.20% |
| Phosphorus (P) | ≤0.030% | ≤0.05% |
| Sulfur (S) | ≤0.030% | ≤0.05% |
2. Mechanical Properties Comparison
| Parameter | ASTM A106 (Gr.B) | ASTM A252 (Gr.3) |
|---|---|---|
| Yield Strength | ≥240 MPa | ≥241 MPa |
| Tensile Strength | ≥415 MPa | ≥455 MPa |
| Elongation | ≥24% | ≥20% |
3. Mechanical Characteristics Comparison
| Characteristic | ASTM A106 | ASTM A252 |
|---|---|---|
| Temperature Range | -30℃~+80℃ | -20℃~+50℃ |
| Inspection Standard | 100% Hydrostatic Test | 100% Weld Inspection |
| Straightness Requirement | Not specified | ≤0.25% of length |
4. Application Differences
ASTM A106: Fluid transmission pipelines, high-temperature/pressure systems, Petrochemical equipment
ASTM A252: Pile foundation engineering, excavation support, Port/wharf structures
A252 GR3 Pipe pile factory
