Each grade is further categorized by impact test temperature (quality level):
The GB/T 16270 standard includes a wide range of grades to suit different structural needs: gb t 16270 pdf
| Property | Value | |----------|-------| | Yield strength (≥) | 690 MPa | | Tensile strength | 770–940 MPa | | Elongation (≥) | 14% | | Impact (≥) | 47 J @ -20°C (for D grade) | | Carbon equivalent (max) | 0.65% for t ≤ 50mm | Each grade is further categorized by impact test