| Ф2.0 | Ф2.5 | Ф3.0 | Ф3.2 | Ф3.5 | Ф3.8 | Ф4.0 | Ф4.05 | Ф 4.2 | Ф4.5 |
| Ф4.75 | Ф 4.8 | Ф5.0 | Ф5.5 | Ф6.0 | Ф6.35 | Ф 6.5 | Ф7.0 | Ф7.5 | Ф8.0 |
| Ф8.5 | Ф9.0 | Ф9.5 | Ф10 | Ф10.5 | Ф 11 | Ф11.5 | Ф 12 | Ф12.5 | Ф 12.7 |
| Ф13 | Ф13.5 | Ф 14 | Ф15 | Ф16 | Ф17 | Ф18 | Ф19 | Ф20 | Ф21 |
| Ф22 | Ф23 | Ф24 | Ф25 |
| Ф2.0 | Ф2.5 | Ф3.0 | Ф3.5 | Ф4.0 | Ф4.5 | Ф5.0 | Ф5.3 | Ф6 | Ф6.3 |
| Ф6.5 | Ф7.0 | Ф7.3 | Ф8.0 | Ф8.3 | Ф8.5 | Ф9.0 | Ф9.3 | Ф10 | Ф10.3 |
| Ф11 | Ф12 | Ф12.3 | Ф13 | Ф14 | Ф14.3 | Ф15 | Ф15.1 | Ф15.3 | Ф16 |
| Ф16.3 | Ф17 | Ф17.3 | Ф18 | Ф18.3 | Ф19 | Ф19.3 | Ф20 | Ф20.3 | Ф21 |
| Ф21.3 | Ф22.3 | Ф23.3 | Ф24 | Ф24.3 | Ф25.3 | Ф26.3 | Ф27.3 | Ф28.3 | Ф30 |
| Ф30.3 | Ф32.3 | Ф35.3 | Ф36.3 | Ф38.3 | Ф40.3 | Ф42.3 |
Type 630, also known as 17-4 PH, is a martensitic, precipitation-hardening stainless steel known for its excellent combination of high strength, hardness, and good corrosion resistance. It can be heat-treated through a low-temperature aging process to enhance mechanical properties. 630 is commonly used in aerospace, marine, chemical, and food processing industries for parts like pump shafts, valve stems, and fasteners. This material retains its magnetic properties in all conditions and is prized for its toughness and corrosion resistance, comparable to 304 stainless steel in many environments.
| CHINA | U.S.A | GERMANY | JAPAN | |
| 0Cr17Ni4Cu4Nb | UNS S17400 | WS 1.4542 | SUS 630 | |
| AISI 630 | X5CrNiCuNb17-4 |
| C | SI | Mn | P | S | Cr | Fe | Nb+Ta | Ni | Cu |
| ≤0.07 | ≤1.00 | ≤1.00 | ≤0.04 | 0.03 | 15.00-17.50 | Bal | 0.15-0.45 | 3.00-5.00 | 3.00-5.00 |