| Ordinary carbon structural steel | |||||||
| Item | China | U.S.A | Japan | Germany | Britain | France | International Organization for Standardization |
| GB | ASTM A283M A573M A572 |
JIS | DIN EN | BSBSEN | NFNFEN | ISO 630 | |
| Grade | Grade | Grade | Grade | Grade | Grade | ||
| Ordinary carbon structural steel |
Q195 | Cr.B | SS330 | S185 | 040A10 | S185 | |
| SPHC | S185 | ||||||
| SPHD | |||||||
| Q215A | Cr.C | SS330 | 040A12 | ||||
| Cr.58 | SPHC | ||||||
| Q235A | Cr.D | SS400 | 080A15 | E235B | |||
| SM400A | |||||||
| Q235B | Cr.D | SS400 | S235JR | S235JR | S235JR | E235B | |
| SM400A | S235JRG1 | S235JRG1 | S235JRG1 | ||||
| S235JRG2 | S235JRG2 | S235JRG2 | |||||
| Q255A | SS400 | ||||||
| SM400A | |||||||
| Q275 | SS490 | E275A | |||||