1. Standard
National Standard:GB/T 218332. Chemical Composition
Elementss | C | Mn | P | S | Si | Cr | Mo | Ni | N | Cu |
Min | 22.0 | 3.0 | 4.5 | 0.14 | ||||||
Max | 0.030 | 2.0 | 0.030 | 0.020 | 1.00 | 23.0 | 3.5 | 6.5 | 0.20 | |
Actual value | 0.025 | 1.30 | 0.023 | 0.0001 | 0.41 | 22.8 | 3.1 | 5.0 | 0.19 | 0.20 |
3. Mechanical Properties
Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
Hardness HBW/HRC |
Min | 655 | 485 | 25 | |
Max | 290/30 | |||
Actual value | 788 | 620 | 38 | 22.5 |
4. Typical Size
Size |
Outside Diameter mm |
Permissible Variations in Outside Diameter mm |
Wall Thickness mm |
Average Wall Permissible Variations in Wall Thickness |
89×6 | 89 | ±0.75 | 6 | ±7.5%S |