1. Standard
American Standard:ASTM B4232. Chemical Composition
| Elements | C | Mn | S | Si | Cr | Mo | Ni | Ti | Al | Cu | Fe |
| Min | 19.5 | 2.5 | 38.0 | 0.60 | 1.50 | 22.0 | |||||
| Max | 0.05 | 1.00 | 0.03 | 0.50 | 23.5 | 3.5 | 46.0 | 1.20 | 0.20 | 3.00 | |
| Actual value | 0.01 | 0.11 | 0.001 | 0.09 | 21.99 | 3.21 | 42.28 | 0.63 | 0.08 | 1.81 | 29.12 |
3. Mechanical Properties
| Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
| Min | 586 | 241 | 30 |
| Max | |||
| Actual value | 632 | 268 | 51 |
4.Typical Size
| Size |
Outside Diameter mm |
Permissible Variations in Outside Diameter mm |
Wall Thickness mm |
Average Wall Permissible Variations in Wall Thickness |
| 219.1*12.7 | 219.1 | ±0.79 | 12.7 | ±10%S |
Note:Standard requirements control range: OD：±0.79mm，WT：±10%S
5. Typical Application Environment
1)Ocean: Marine structure of Marine environment, desalination of seawater, aquaculture, heat exchange of seawater, etc.
2) Environmental protection: flue gas desulfurization device for thermal power generation, wastewater treatment, etc.
3) Energy field: nuclear power generation, comprehensive utilization of coal, tidal power generation, etc.
4)Petrochemical industry: oil refining, chemical and chemical equipment, etc.
5) Food field: salt, soy sauce brewing, etc.
6)Aerospace.