| Grade | USA (ASTM) | China (GB/T) | Europe (EN) | Japan (JIS) | Germany (DIN) | UK (BS) |
| A36 | A36 | Q235 | S235JR | SS400 | St37-2 | 43A |
| S275 | S275 | Q345B | S275JR | SS400 | St44-2 | 43A |
| S355 | S355 | Q345D | S355JR | SS490 | St52-3 | 50B |
| 1045 | 1045 | 45# | C45 | S45C | C45K | 1045 |
| 4140 | 4140 | 42CrMo | 42CrMo4 | SCM440 | 42CrMo4 | 4140 |
| 4340 | 4340 | 40CrNiMo | 34CrNiMo6 | SNCM439 | 34CrNiMo6 | 4340 |
Properties and Applications of Common Carbon Steel Grades
| Grade | Main Components | Properties | Applications |
| A36 | Carbon Steel | Good weldability, machinability, and mechanical properties; suitable for structural components | Construction, bridges, buildings, machinery parts, and automotive components |
| S275 | Carbon Steel | Good strength and weldability, suitable for structural applications | Structural steel for buildings, bridges, and engineering structures |
| S355 | Carbon Steel | High strength, good weldability, and machinability; used in heavy-duty applications | Structural steel for bridges, buildings, and other engineering structures requiring high strength |
| 1045 | Carbon Steel | Good strength and wear resistance; suitable for parts requiring moderate tensile strength | Shafting, gears, bolts, and structural components |
| 4140 | Alloy Steel | Good toughness, strength, and wear resistance; suitable for heat-treated applications | Automotive parts, crankshafts, and heavy machinery components |
| 4340 | Alloy Steel | High strength, good fatigue resistance, and toughness; suitable for high-stress applications | Aircraft components, gears, and high-stress structural parts |
As a leading Chinese supplier, our company offers a diverse range of carbon steel products that meet various international standards. We specialize in high-quality carbon steel plates, pipes, bars, profiles, and wire ropes, all customizable to fit your specific requirements.
We are proud of our advanced manufacturing capabilities and invite you to visit our factory for a thorough inspection of our operations. To facilitate your decision-making process, we offer free sample delivery for your evaluation.
For inquiries or orders, please contact us. We are dedicated to providing exceptional service and meeting all your carbon steel needs.
