17-4PH stainless steel sheet supplier, contact us to get free quote and sample!
17-4PH stainless steel sheet is a precipitation-hardening martensitic stainless steel containing chromium, nickel, and copper. The "PH" stands for precipitation hardening, a heat treatment process that increases strength without sacrificing toughness.
The material is also commonly identified as:
- UNS S17400
- ASTM A693 Grade 630
- SUS630
- EN 1.4542
- 17-4 precipitation hardening stainless steel
Chemical Composition of 17-4PH Stainless Steel Sheet
| Element | Content |
|---|---|
| Chromium (Cr) | 15.0 – 17.5% |
| Nickel (Ni) | 3.0 – 5.0% |
| Copper (Cu) | 3.0 – 5.0% |
| Niobium + Tantalum | 0.15 – 0.45% |
| Carbon (C) | ≤ 0.07% |
| Manganese (Mn) | ≤ 1.0% |
| Silicon (Si) | ≤ 1.0% |
Key Features of 17-4PH Stainless Steel Sheet
Excellent Mechanical Strength
One of the biggest advantages of 17-4PH stainless steel sheet is its outstanding strength-to-weight ratio. After heat treatment, the material can achieve very high yield and tensile strength levels, making it suitable for load-bearing applications.
Good Corrosion Resistance
Although not as corrosion resistant as 316 stainless steel in highly acidic conditions, 17-4PH sheet performs well in atmospheric, freshwater, marine, and mildly corrosive industrial environments.
Heat Treatable
Unlike many conventional stainless steels, 17-4PH stainless steel sheet can be hardened through aging treatment. Different heat treatment conditions allow manufacturers to tailor the mechanical properties according to application requirements.
Dimensional Stability
The material experiences minimal distortion during heat treatment, which is important for precision-machined parts and aerospace components.
Good Fabrication Performance
17-4PH sheet can be cut, welded, machined, and formed using standard industrial methods, although tooling requirements are higher compared with ordinary stainless steel grades.
Available Sizes and Specifications
Typical supply range for 17-4PH stainless steel sheets includes:
| Thickness | Width | Length |
|---|---|---|
| 0.3 mm – 100 mm | 1000 mm – 2500 mm | 2000 mm – 6000 mm |
Available forms:
- Cold rolled 17-4PH sheet
- Hot rolled 17-4PH plate
- Polished stainless steel 17-4PH sheet
- Custom cut sizes
- CNC processed parts
Common surface finishes:
- No.1
- 2B
- BA
- No.4
- HL finish
Applications of Stainless Steel 17-4PH Sheet
Aerospace Industry
The aerospace sector uses 17-4PH stainless steel sheet for:
- Structural aircraft components
- Turbine parts
- Fasteners
- Engine hardware
- Landing gear components
Its combination of strength and corrosion resistance helps reduce maintenance costs and improve service life.
Oil and Gas Industry
In offshore and energy projects, 17-4PH sheet and plate are often selected for:
- Valve components
- Pump shafts
- Pressure-containing parts
- Offshore platform equipment
- Instrumentation systems
Marine Engineering
Marine environments require materials capable of resisting moisture and chloride exposure. 17-4PH is frequently used for:
- Propeller shafts
- Marine fittings
- Boat hardware
- Seawater pump components
Medical Equipment
The material's mechanical reliability makes it suitable for certain surgical and dental instruments.
Industrial Manufacturing
Many heavy industrial manufacturers choose 17-4PH stainless steel plate for:
- Mold manufacturing
- Precision tools
- Chemical processing equipment
- High-strength mechanical assemblies
Welding and Machining Considerations
Welding
17-4PH stainless steel can be welded using standard arc welding techniques. Post-weld heat treatment may be recommended depending on service requirements.
Machining
Machining is easier in the solution-annealed condition. Carbide tooling and appropriate cutting speeds are recommended for precision manufacturing.
