| Name | Brand | Specifications | Executive standard | Chemical composition analysis (melting composition)% | Purpose | |||||
| C | Si | Mn | P ≤ | S ≤ | Other | |||||
| 连铸圆管坯 | 20 | Φ160~230 | YB/T 4149 Supply technical agreement | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | For structural pipe, transmission pipe, etc | |
| 45 | Φ160~230 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | ||||
| L245N | Φ160~230 | 0.13-0.16 | 0.20-0.35 | 0.90-1.10 | 0.02 | 0.02 | Ti≤0.030 | |||
| Q335B | Φ160~230 | ≤0.24 | ≤0.55 | ≤1.60 | 0.035 | 0.035 | Cr≤0.30 | |||
| 37Mn5 | Φ160~230 | 0.34-0.39 | 0.20-0.35 | 1.25-1.50 | 0.025 | 0.015 | Cr≤0.150 | |||
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