1. Core Equivalent Materials Comparison Table
| Standard | Grade | Key matching criteria |
|---|---|---|
| GB | Q235C | Yield strength ≥235MPa, carbon content ≤0.17%, sulfur content ≤0.035% |
| ASTM | ASTM A36 | Non-alloy structural steel, yield strength ≥ 250MPa, weldability compatible |
| EN | St37-3K | Both are low carbon welded structural steels with similar mechanical properties |
2. Chemical composition and performance differences
| Features | S235JRH (EN10219) | Q235C (GB/T) |
|---|---|---|
| C | ≤0.17% | ≤0.18% |
| S | ≤0.030% | ≤0.035% |
| Low temperature toughness | -20℃ impact energy ≥27J | Only Q235C requires 0℃ impact energy ≥ 27J |
| High temperature applicability | Design temperature ≤350℃ | No clear high temperature performance requirements |
3. Application scenario adaptation suggestions
| Working conditions | Recommended Equivalent Materials | Reason |
|---|---|---|
| Normal temperature building structure | Q235C / ASTM A36 | Static pressure requirements, cost optimization |
| Low temperature welding frame (-20℃) | S235JRH | Ensure impact toughness |
| High temperature support parts (≤350℃) | S235JRH | Q235C has no high temperature strength data support |
