17-4PH Stainless Steel Supplier | UNS S17400 Plate, Bar, Sheet in Stock
17-4 PH Stainless Steel – Factory Supply, Fast Delivery
17-4 PH (also known as AISI 630) is a chromium-copper precipitation-hardening stainless steel that perfectly combines high strength, excellent corrosion resistance, and superior machinability. After heat treatment, its yield strength can reach 1100-1300 MPa (160-190 ksi), making it a high-end solution to replace common martensitic stainless steels (such as 410) and austenitic stainless steels (such as 304).
Looking for reliable 17-4PH stainless steel supplier?
Huaxiao Metal provides UNS S17400 stainless steel in multiple forms with stable stock and competitive factory pricing.
Available sizes: plate, sheet, round bar, forging
Delivery time: 7–15 days
Certificate: EN 10204 3.1 / SGS / TUV
MOQ: flexible
Key reasons to choose 17-4 PH:
Extreme Strength: Achievable through simple low-temperature aging treatment.
Corrosion Resistance: Superior to the 400 series and close to 304 stainless steel in most environments.
Processing Stability: Low-temperature heat treatment greatly reduces the risk of dimensional deformation of parts.
Magnetic Properties: This material is magnetic in all states.
Available Specifications
Product Forms
- Plates (Thickness: 3–100mm)
- Sheets (0.5–3mm)
- Round Bars (Φ10–300mm)
- Forgings
Standards
- ASTM A564
- AMS 5643
- UNS S17400
Heat Treatment Conditions
- H900
- H1025
- H1150
Available Product Forms
Huaxiao Metal supplies 17-4PH stainless steel in various industrial forms.
17-4PH Stainless Steel Plate
Thickness: 3mm – 120mm
Applications:
- pressure equipment
- aerospace structures
- tooling systems
17-4PH Stainless Steel Sheet
Thickness: 0.5mm – 3mm
Surface: 2B, BA, No.4, polished
Applications:
- precision fabrication
- industrial enclosures
- equipment panels
17-4PH Stainless Steel Round Bar
Diameter: 10mm – 300mm
Applications:
- shafts
- fasteners
- mechanical parts
- rotating systems
17-4PH Forgings
Applications:
- aerospace rings
- heavy-load flanges
- offshore components
17-4PH Precision Machined Parts
Huaxiao Metal also supplies customized 17-4PH precision machined components.
Capabilities include:
- CNC turning
- drilling
- milling
- threading
- polishing
- precision tolerance machining
This service is especially suitable for:
- valve manufacturers
- aerospace companies
- pump factories
- industrial equipment manufacturers
👉 Buyers can reduce sourcing time by purchasing both raw material and machining service together.
Heat Treatment Conditions of 17-4PH Stainless Steel
One major advantage of 17-4PH stainless steel is its ability to achieve different mechanical properties through heat treatment.
H900 Condition
Characteristics:
- maximum hardness
- highest strength
- excellent wear resistance
Applications:
- aerospace components
- high-load shafts
H1025 Condition
Characteristics:
- balanced strength and toughness
- good fatigue resistance
Applications:
- valves
- pump systems
- industrial machinery
H1150 Condition
Characteristics:
- improved toughness
- better stress corrosion resistance
Applications:
- offshore systems
- marine equipment
Main Advantages of 17-4PH Stainless Steel
Extremely High Strength
17-4PH is much stronger than standard austenitic stainless steels like 304 and 316.
This allows engineers to reduce component weight while maintaining structural strength.
Good Corrosion Resistance
17-4PH performs well in:
- humid environments
- industrial atmospheres
- mild chemical exposure
- marine conditions
Although 316 offers better corrosion resistance in chloride environments, 17-4PH provides a better balance between strength and corrosion performance.
Excellent Machinability
Compared with many high-strength alloys, 17-4PH offers relatively good machinability.
This helps reduce CNC machining costs.
Excellent Fatigue Resistance
The material performs well under repeated stress and cyclic loading.
This makes it suitable for rotating and dynamic mechanical systems.
Heat Treatable Flexibility
Different heat treatment conditions allow engineers to optimize:
- strength
- toughness
- hardness
- corrosion resistance
for different projects.
Typical Applications of 17-4PH Stainless Steel
Aerospace Industry
17-4PH is widely used in:
- aircraft fittings
- landing gear components
- aerospace shafts
- turbine parts
The material’s high strength-to-weight ratio is highly valued in aerospace engineering.
Oil & Gas Industry
Applications include:
- valves
- pump shafts
- drilling systems
- pressure components
17-4PH performs well in high-pressure industrial environments.
Marine Engineering
Used for:
- marine shafts
- offshore fasteners
- mechanical assemblies
because of its corrosion resistance and mechanical strength.
Industrial Machinery
Common uses:
- gears
- rotating equipment
- molds
- tooling systems
Medical Equipment
17-4PH is also used in selected medical and surgical instruments due to its strength and corrosion performance.
17-4PH Stainless Steel Chemical Composition
| Element | Content (%) |
| Chromium (Cr) | 15.0 – 17.5 |
| Nickel (Ni) | 3.0 – 5.0 |
| Copper (Cu) | 3.0 – 5.0 |
| Niobium (Nb) | 0.15 – 0.45 |
| Carbon (C) | ≤0.07 |
| Manganese (Mn) | ≤1.00 |
| Silicon (Si) | ≤1.00 |
👉 Full MTC certificate available upon request.
17-4PH Stainless Steel Equivalent Grades
| tandard | Grade |
|---|---|
| UNS | S17400 |
| ASTM | 630 |
| AISI | 630 |
| EN | 1.4542 |
| DIN | X5CrNiCuNb16-4 |
These equivalent standards are commonly requested by international buyers and engineering companies.
17-4PH Stainless Steel Mechanical Properties
The mechanical properties of 17-4PH depend heavily on heat treatment condition.
Typical Mechanical Properties (H900)
Property | Value |
Tensile Strength | 1310 MPa |
Yield Strength | 1170 MPa |
Hardness | HRC 40 |
Elongation | 10% |
Typical Mechanical Properties (H1025)
| Property | Value |
| Tensile Strength | 1070 MPa |
| Yield Strength | 1000 MPa |
| Hardness | HRC 35 |
| Elongation | 12% |
The choice of condition depends on application requirements.
- H900 = highest strength
- H1025 = balanced performance
- H1150 = better toughness and ductility
17-4PH vs 316 Stainless Steel
| Property | 316 | 17-4PH |
|---|---|---|
| Strength | Medium | Very High |
| Corrosion | Excellent | Good |
| Cost | Lower | Higher |
| Use | General | Structural |
Choose 17-4PH when:
- high strength is required
- structural loading is important
- fatigue resistance matters
Choose 316 when:
- chloride corrosion resistance is the top priority
- chemical resistance is critical
Why Buy from Huaxiao Metal
Direct factory supply
Stable inventory
Export to 50+ countries
Strict quality inspection
Competitive price
Export Experience: Over 15 years
Certification Support: Provides EN 10204 3.1 Material Certificate (MTC), supports third-party inspection (SGS, TUV).
Testing Methods: Ultrasonic testing (UT), PMI spectral analysis, tensile testing, hardness testing, salt spray testing.
Professional Packaging: For long-haul markets such as South America and Europe, uses thickened fumigated wooden crates and rust-proof film sealing to ensure “zero rust” upon arrival.
👉 Reduce your sourcing cost
FAQ – 17-4PH Stainless Steel Supplier
What is 17-4PH stainless steel used for?
17-4PH is mainly used in aerospace, oil & gas, marine engineering, valves, shafts, and high-strength mechanical parts.
Is 17-4PH stronger than 316 stainless steel?
Yes. 17-4PH offers significantly higher tensile and yield strength.
Should I order Condition A or the heat-treated condition?
If you have complex CNC machining needs, we recommend purchasing Condition A; if you need the finished product for direct assembly, we can process it to H900/H1150, etc., before shipping.
What is your machining accuracy?
Our CNC machined parts have tolerances controlled within ±0.01mm.
Can 17-4PH be machined?
Yes. 17-4PH has relatively good machinability and is widely used for CNC precision components.
Do you provide MTC certificate?
Yes. EN 10204 3.1 certificates are available.
Do you have 17-4PH in stock?
Yes, we keep regular stock for fast delivery.
Can you cut to size?
Yes, custom cutting is available.
What is your MOQ?
Flexible depending on size and specification.
Get 17-4PH Stainless Steel Price Today
Looking for reliable 17-4PH stainless steel supplier?
Huaxiao Metal provides:
✔ Factory direct pricing
✔ Stable stock
✔ Fast delivery
✔ Precision machining support
✔ Global export service
👉 Send your inquiry now and receive a quotation within 24 hours.
Email: [email protected]
