
| 標準 | 牌號 | 抗拉強度(Mpa) | 屈服強度(Mpa) | 伸長率(%) | 
| GB3087 | 10 | 335-475 | ≥195 | ≥24 | 
| 20 | 410-550 | ≥245 | ≥20 | 
| 標準 | 牌號 | 化學成分 | |||||||||
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | ||
| GB3087 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.15 | / | ≤0.25 | ≤0.25 | / | 
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | / | ≤0.25 | ≤0.25 | / | |