1. Standard
National Standard:GB/T 218332. Chemical Composition
Elements | C | Mn | P | S | Si | Cr | Mo | Ni | N | Cu |
Min | 24.0 | 3.0 | 6.0 | 0.24 | ||||||
Max | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 26.0 | 5.0 | 8.0 | 0.32 | 0.50 |
Actual value | 0.026 | 0.69 | 0.030 | 0.002 | 0.54 | 25.7 | 3.5 | 6.2 | 0.29 | 0.088 |
3.Mechanical Properties
Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
Hardness HBW/HRC |
Min | 800 | 550 | 15 | |
Max | 300/32 | |||
Actual value | 863 | 726 | 37 | 23.3 |
4. Typical Size
Size |
Outside Diameter Mm |
Permissible Variations in Outside Diameter mm |
Wall Thickness mm |
Average Wall Permissible Variations in Wall Thickness |
60×5.5 | 60 | ±0.50 | 5.5 | ±7.5%S |
Note:Standard requirements control range:OD:±0.50mm,WT:±7.5%S