630 is martensitic precipitation hardening stainless steel, China grade 0Cr17Ni4Cu4Nb. It has high strength, high hardness, good welding performance and corrosion resistance. It has been widely used in valves, shafts and chemical fiber industries and high-strength parts with certain corrosion resistance requirements.
Supply Form & Size
| Form of Supply | Size(mm) | Length(mm) |
| Round bar | 6.0mm-1200mm | 2.5m-10m |
Chemical Composition&Related Specifications
| Grade | C | Si | Mn | Cr | Ni | P | S | Cu | Nb |
| SUS630 | ≤0.07 | ≤1.00 | ≤1.00 | 15.50~17.50 | 3.00~5.00 | ≤0.04 | ≤0.03 | 3.00~5.00 | 0.15~0.45 |
Brand comparison table
| AISI/SAE | DIN/EN | BS | JIS/KS | China |
| S17400,630/ 17-4PH | X5CrNiCuNb16-4,1.4542 | X5CrNiCuNb16-4,1.4542 | SUS630 | 05Cr17Ni4Cu4Nb |
