30mm SUS630 Martensitic Stainless Steel rod X5CrNiCuNb16-4 rod for
high corrosion resistance parts
Chinese Grade: 0Cr17Ni4Cu4Nb
(UNS S17400, AISI 630, AMS5643, ASTM A705, ASTM A564)
SUS630(Japanese Grade)is martensitic precipitation hardening stainless steel. It has high strength, high hardness, good welding performance and
corrosion resistance. It has been widely used in valve, shaft,
chemical fiber industry and high strength parts with certain
corrosion resistance requirements.
| Country | China | America | Japan | Europe |
| Grade | 0Cr17Ni4Cu4Nb | ASTMS17400 | SUS630 | X5CrNiCuNb16-4 |
Characteristics and Usage:
- Precipitation hardening stainless steel with copper is used for
manufacturing parts with high corrosion resistance and high
strength, such as bearings and steam turbine parts.
- Precipitation hardening martensitic stainless steel with copper and
niobium has low carbon content, its corrosion resistance and
weldability is better than that of common martensitic stainless
steel. Similar to type18-8 stainless steel, its heat treatment
process is simple and the machinability is good, but it is
difficult to meet the cryogenic processing.
Metallographic Structure: precipitation hardening type
Application Industry: offshore platform, helideck, other platforms, food industry, pulp
and paper industry, aerospace (turbine blade), mechanical parts and
nuclear waste barrel
Chemical Composition%:
| GRADE | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Nb |
| 0Cr17Ni4Cu4Nb | ≤0.07 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.030 | 3.0-5.0 | 15.5-17.5 | - | 3.0-5.0 | 0.15-0.45 |
| ASTMS17400 | ≤0.07 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.030 | 3.0-5.0 | 15.5-17.5 | - | 3.0-5.0 | 0.15-0.45 |
| SUS630 | ≤0.07 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.030 | 3.0-5.0 | 15.5-17.5 | - | 3.0-5.0 | 0.15-0.45 |
| X5CrNiCuNb16-4 | ≤0.08 | ≤1.00 | ≤1.00 | ≤0.045 | ≤0.030 | 3.0-5.0 | 15.0-17.0 | - | 3.0-5.0 | 0.15-0.45 |
Mechanical Property:
Aging Temperature | 480℃ | 550℃ | 580℃ | 620℃ |
Tensile Strength σb (MPa) | ≥1310 | ≥1060 | ≥1000 | ≥930 |
Yield σ0.2 (MPa) | ≥1180 | ≥1000 | ≥865 | ≥725 |
Elongation δ5 (%) | ≥10 | ≥12 | ≥13 | ≥16 |
Section Shrinkage ψ (%) | ≥40 | ≥45 | ≥45 | ≥50 |
Hardness | ≥375HB/≥40HRC | ≥331HB/≥35HRC | ≥302HB/≥31HRC | ≥277HB/≥28HRC |
Heat Treatment
SUS630 alloy is precipitated, Quenched and martensitic stainless
steel with high strength, hardness and corrosion resistance.
However, its mechanical properties which can reach the compressive
strength of 1100-1300 MPa (160-190 Ksi) will be more perfect
through heat treatment.
This grade cannot be used at temperatures higher than 300 ℃ (570F)
or at very low temperature. Its corrosion resistance is the same as
that of 304 and 430 in normal atmosphere, diluted acid or salt.
