1. Standard
National Standard：GB/T149762. Chemical Composition
| C | Mn | P | S | Si | Cr | Mo | Ni | Ti | Nb | Cu | Fe | Al | |
| Min | 17 | 9 | 10C | ||||||||||
| Max | 0.08 | 2.00 | 0.035 | 0.030 | 1.00 | 19 | 12 | 1.10 | |||||
| Actual value | 0.06 | 0.90 | 0.029 | 0.003 | 0.42 | 17.29 | 9.48 | 0.69 |
3. Mechanical Properties
| Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
Hardness HBW/HRC |
IMPact J |
| Min | 520 | 205 | 35 | ||
| Max | |||||
| Actual value | 631 | 273 | 39 |
4. Typical Size
| Size |
Outside Diameter mm |
Tolerance of Outside Diameter mm |
Wall Thickness mm |
Tolerance of Wall Thickness |
| 60.3*11.05 | 60.3 | ±0.85%D | 11.05 |
+12.5%S －10%S |
High class： OD：±0.75%D，WT：±10%S
5. Typical Application Environment
1）Boilers and heat exchangers2）Fluid Service