| 等級 | C | Mn | Si | P | S | V | Nb | Ti | Al | Cr | Ni |
| A | ≦0.20 | 1.00~1.70 | ≦0.55 | ≦0.045 | ≦0.045 | 0.02~0.20 | 0.015~0.060 | 0.02~0.20 | - | ≦0.40 | ≦0.70 |
| B | ≦0.20 | 1.00~1.70 | ≦0.55 | ≦0.040 | ≦0.040 | 0.02~0.20 | 0.015~0.060 | 0.02~0.20 | - | ≦0.40 | ≦0.70 |
| C | ≦0.20 | 1.00~1.70 | ≦0.55 | ≦0.035 | ≦0.035 | 0.02~0.20 | 0.015~0.060 | 0.02~0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
| D | ≦0.20 | 1.00~1.70 | ≦0.55 | ≦0.030 | ≦0.030 | 0.02~0.20 | 0.015~0.060 | 0.02~0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
| E | ≦0.20 | 1.00~1.70 | ≦0.55 | ≦0.025 | ≦0.025 | 0.02~0.20 | 0.015~0.060 | 0.02~0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
| 等級 | δ5/% |
| A | ≧18 |
| B | ≧18 |
| C | ≧19 |
| D | ≧19 |
| E | ≧19 |
| 厚度(直徑、邊長)/mm | ≦16 | >16~35 | >35~50 | >50~100 |
| σs/MPa | ≧420 | ≧400 | ≧380 | ≧360 |
| 等級¦溫度 | +20℃ | 0℃ | -20℃ | -40℃ |
| A | ? | ? | ? | ? |
| B | ≧34 | ? | ? | ? |
| C | ? | ≧34 | ? | ? |
| D | ? | ? | ≧34 | ? |
| E[2] | ? | ? | ? | ≧27 |