Material – BS 622
Standard Specification for Alloy Steel; Steels for Fired and Unfired Pressure Vessels: Sections and Bars
Group - Ferrous Mild Steel Alloys
Sub Group - BS 622 Cr-Mo Alloy Steel; Steels for Fired and Unfired Pressure Vessels: Sections and Bars
Application - Intended for Valve, Pump, General Engineering, Automotive and Other Industries
Grade Belongs to the Industry - Bar
| Chemical Composition | ||
|---|---|---|
| Carbon | C % | 0.090 - 0.150 |
| Silicon | Si % | 0.500 max. |
| Manganese | Mn % | 0.300 - 0.600 |
| Phosphorus | P % | 0.025 max. |
| Sulphur | S % | 0.015 max. |
| Chromium | Cr % | 2.000 - 2.500 |
| Molybdenum | Mo % | 0.900 - 1.100 |
| Nickel | Ni % | 0.300 max. |
| Iron | Fe % | Balance |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| Heat Treatment |
|---|
| Normalising or Annealing or Hardening + Tempering |
| Mechanical Properties | |
|---|---|
| Tensile Strength in Mpa | 490 - 690 |
| Yield Strength in Mpa | 275 min. |
| Elongation in % | 16 min. |
| Reduction of Area in % | - |
| Hardness in HB | 156 - 235 |
| Impact in Joule | 25 J @ RT |
Cross Reference Table
| Material | Standard | Country | Grade Belong to the Industry |
|---|---|---|---|
| SA-217 WC9 | ASME | USA | Casting |
| 10 CrMo 9-10 | AFNOR NF | France | Steel |
| 10 CrMo 9-10 | DIN | Germany | Forging |
| 10 CrMo 9-10 | EN | European Union | Casting |
| 10 CrMo 9-10 | UNI | Italy | Casting |
| J21890 | UNS | USA | Casting |
| A217 Grade WC9 | ASTM | USA | Casting |