Main Composition
Carbon (C): ≤0.07%
Manganese (Mn): ≤1.00%
Phosphorus (P): ≤0.04%
Sulfur (S): ≤0.03%
Silicon (Si): ≤1.00%
Chromium (Cr): 15.00-17.50%
Nickel (Ni): 3.00-5.00%
Copper (Cu): 3.00-5.00%
Niobium (Nb) + Tantalum (Ta): 0.15-0.45%
Key Features
1. High Strength and Hardness: 17-4 PH can achieve very high strength and hardness through precipitation-hardening treatment, making it suitable for applications requiring high strength.
2. Good Corrosion Resistance: While not as corrosion-resistant as austenitic stainless steels like 304 and 316, it still offers good corrosion resistance in most environments.
3. Good Weldability: It can be welded using various welding processes. Post-weld heat treatment is recommended to achieve optimal properties.
4. Good Machinability: It has good machinability in the solution-treated condition and can further improve mechanical properties after heat treatment.
After appropriate precipitation-hardening heat treatment, 17-4 PH stainless steel can achieve the following typical mechanical properties:
Tensile Strength: 930-1310 MPa (135-190 ksi)
Yield Strength: 725-1100 MPa (105-160 ksi)
Elongation: 10-20%
Reduction of Area: 40-60%
Hardness: HRC 28-38
Grades from different countries
|
United States |
Japan |
Germany |
United Kingdom |
France |
|
UNS S17400 |
JIS SUS630 |
DIN 1.4542 |
BS 560S17 |
AFNOR Z6CNU 17-04
|
Applications
Due to its combination of properties, 17-4 PH stainless steel is widely used in the following fields:
Aerospace Industry: Components such as turbine parts, structural parts, etc.
Chemical and Petrochemical Industry: Items like reaction vessels, valves, pumps, etc.
Medical Devices: Instruments like surgical tools, dental equipment, etc.
Power Generation: Components for nuclear reactors, among others.
Food Processing Equipment: Machinery parts for food production lines.
