High-performance alloy material for industrial engineering and critical application conditions.
Scope of supply of Aviation Group:
Non-standard forgings, round rods, steel plates, rings, seamless pipes
1. Introduction to SUS630 Materials
SUS630 alloy is precipitation hardening martensitic stainless steel containing copper and niobium. Corresponding grade: 0Cr17Ni4Cu4Nb, 05Cr17Ni4Cu4Nb, S17400
SUS630 is martensite precipitation hardening stainless steel with high strength, high hardness, excellent welding performance and corrosion resistance. It is widely applied in valves, shafts, chemical fiber, aerospace and other industries for high-strength structural parts requiring certain corrosion resistance.
2. SUS630 Chemical Composition
| alloy | % | C | Mn | Si | P | S | Cr | Ni | Cu | Fe | Nb |
| SUS630 | Minimum value | – | – | – | – | – | 15.5 | 3.0 | 3.0 | Bal | 0.15 |
| Maximum value | 0.07 | 1.0 | 1.0 | 0.040 | 0.030 | 17.5 | 5.0 | 5.0 | 0.45 |
3. SUS630 Physical Performance
| density | 7.78g/cm³ |
| Melting point | 1400-1440℃ |
Mechanical properties of SUS630 alloy at room temperature:
| Condition | Tensile strength Rm N/mm2 | Yield strength RP0.2 N/mm2 | Elongation A5 % | Brinell hardness HB |
| 480℃ aging | ≥1310 | ≥1180 | ≥10 | ≥40 |
| 550℃ aging | ≥1060 | ≥1000 | ≥12 | ≥35 |
| 580℃ aging | ≥1000 | ≥865 | ≥13 | ≥31 |
| 620℃ aging | ≥930 | ≥325 | ≥16 | ≥28 |
4. SUS630 corrosion resistance
5. SUS630 delivery status
Generally supplied under specified heat treatment state, the heat treatment type shall be stated in the contract; if no specification, it will be delivered with heat treatment finished.
SUS630 alloy is precipitation hardening martensitic stainless steel featuring high strength, hardness and corrosion resistance. After heat treatment, its mechanical properties are optimized, compressive strength reaches 1100-1300 mpa (160-190 ksi). This grade cannot be used above 300°C (570°F) or under extremely low temperature. It performs well against atmosphere, dilute acid and salt corrosion, with corrosion resistance equivalent to 304 and 430 stainless steel.
SUS630 Mechanical Properties
Tensile strength σb (MPa): 480℃ aging ≥1310; 550℃ aging ≥1060; 580℃ aging ≥1000; 620℃ aging ≥930
Conditional yield strength σ0.2 (MPa): 480℃ aging ≥1180; 550℃ aging ≥1000; 580℃ aging ≥865; 620℃ aging ≥725
Elongation δ5 (%): 480℃ aging ≥10; 550℃ aging ≥12; 580℃ aging ≥13; 620℃ aging ≥16
Section shrinkage rate ψ (%): 480℃ aging ≥40; 550℃ aging ≥45; 580℃ aging ≥45; 620℃ aging ≥50
Hardness: Solid solution ≤363HB, ≤38HRC; 480℃ aging ≥375HB, ≥40HRC; 550℃ aging ≥331HB, ≥35HRC; 580℃ aging ≥302HB, ≥31HRC; 620℃ aging ≥277HB, ≥28HRC
SUS630 heat treatment specifications
1) Solution treatment: 1020~1060℃, rapid cooling;
2) 480℃ aging: air cool after solution treatment at 470~490℃;
3) 550℃ aging: air cool after solution treatment at 540~560℃;
4) 580℃ aging: air cool after solution treatment at 570~590℃;
5) 620℃ aging: air cool after solution treatment at 610~630℃. Metallographic structure: precipitation hardening martensite.
Delivery status
Generally supplied under specified heat treatment state, the heat treatment type shall be stated in the contract; if no specification, it will be delivered with heat treatment finished.
6. SUS630 application fields
