17-4PH 630 stainless steel sheet plate
Short Description:
17-4PH 630 Stainless Steel Sheet Plate UNS S17400 is a precipitation hardening stainless steel offering high strength, good corrosion resistance and excellent mechanical properties. Available in customized sizes, surface finishes, heat treatment conditions and inspection documentation for industrial applications.
17-4PH Stainless Steel Sheet Plate Overview
17-4PH Stainless Steel Sheet Plate UNS S17400, also known as Grade 630 stainless steel, is a precipitation hardening stainless steel combining high strength, good corrosion resistance and excellent mechanical properties. It provides a balanced combination of strength, hardness and corrosion resistance for demanding industrial applications.
SAKY STEEL supplies 17-4PH stainless steel sheets and plates in different thicknesses, widths, lengths and surface finishes. Customized dimensions, heat treatment conditions and inspection documents are available according to customer requirements.
17-4PH Stainless Steel Sheet Plate Specifications
| Item | Specification |
|---|---|
| Specification | ASTM A693 / ASTM A484 / AMS 5604 |
| Grade | 17-4PH / Grade 630 / UNS S17400 |
| Thickness | 0.3mm – 30mm |
| Width | 1000mm – 3500mm |
| Length | 2000mm – 6000mm or Customized |
| Production Technology | Hot Rolled / Cold Rolled |
| Surface Finish | 2B / BA / No.1 / No.4 / 8K / Mirror / Hairline |
| Form | Sheet / Plate / Strip / Cut Size |
| Certificate | MTC / EN 10204 3.1 Available |
17-4PH Stainless Steel Equivalent Grades
| Standard | JIS | W.Nr. | UNS |
|---|---|---|---|
| 17-4PH Stainless Steel | - | 1.4542 | S17400 |
17-4PH Stainless Steel Chemical Composition
17-4PH stainless steel is a precipitation hardening stainless steel containing chromium, nickel and copper additions. The chemical composition is controlled according to the applicable specification.
| Grade | C | Cr | Ni | Cu | Cb+Ta |
|---|---|---|---|---|---|
| 17-4PH | 0.07 max | 15.0-17.5 | 3.0-5.0 | 3.0-5.0 | 5×C / 0.45 |
Actual chemical composition shall be confirmed by the applicable specification and MTC.
17-4PH Stainless Steel Sheet Plate Mechanical Properties
17-4PH stainless steel can achieve different mechanical properties through precipitation hardening treatment. The final properties depend on aging condition, product thickness and applicable specification.
| Condition | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation (%) | Hardness HRC |
|---|---|---|---|---|
| Condition A | - | - | - | 38 Max |
| H900 | 190 | 170 | 5 | 40-47 |
| H925 | 170 | 155 | 5 | 38-45 |
| H1025 | 155 | 145 | 5 | 35-42 |
| H1075 | 145 | 125 | 5 | 33-39 |
| H1150 | 135 | 105 | 8 | 28-37 |
Surface Smoothness Test
SAKY STEEL performs surface inspection and roughness testing for stainless steel products to verify surface quality and meet customer requirements for appearance, machining and functional performance.
Test Report
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Why Choose SAKY STEEL?
Material Traceability
SAKY STEEL provides material traceability from raw material information to finished product documentation.
Quality Documentation
MTC, dimensional reports and inspection documents are available according to customer requirements.
Customized Supply
Different sizes, thicknesses, surface finishes and processing requirements can be supplied according to customer specifications.
Inspection Capability
Chemical analysis, mechanical testing, hardness testing, surface inspection and other tests can be arranged when specified.
Export Packaging
Professional packaging solutions are provided to protect stainless steel sheets and plates during international transportation.
SAKY STEEL Quality Assurance
SAKY STEEL applies quality control procedures to ensure material consistency, dimensional accuracy and product reliability according to customer requirements and applicable specifications.
- Visual and dimensional inspection
- Chemical composition analysis
- Mechanical property testing
- Hardness testing
- Surface inspection
- Roughness testing
- Penetrant testing when specified
- Metallographic examination when required
SAKY STEEL Packaging
Proper packaging is essential for international shipment. SAKY STEEL uses suitable packing methods to protect stainless steel sheets and plates from moisture, scratches and transportation damage.
- Protective film for surface protection.
- Wooden pallets or wooden cases for export shipment.
- Steel strip reinforcement for stable transportation.
- Customized packing according to customer requirements.

Applications:
17-4PH stainless steel sheet is a precipitation-hardening martensitic stainless steel that combines high strength and hardness with excellent corrosion resistance. Due to its unique properties, 17-4PH stainless steel sheet finds many applications in a variety of industries, including:
1. Aerospace and Defense: 17-4PH stainless steel sheet is commonly used in the manufacturing of aircraft and missile components due to its high strength-to-weight ratio, excellent corrosion resistance, and ability to withstand high temperatures.
2. Oil and Gas: 17-4PH stainless steel sheet is used in oil and gas exploration and production equipment, such as valves, pumps, and drilling components. The material’s high strength and corrosion resistance make it well-suited for use in harsh offshore environments.
3. Medical: 17-4PH stainless steel sheet is used in medical implants and surgical instruments due to its biocompatibility, corrosion resistance, and high strength.
4. Chemical Processing: 17-4PH stainless steel sheet is used in chemical processing equipment, such as tanks, reactors, and valves, due to its corrosion resistance and ability to withstand high temperatures and pressure.
5. Food Processing: 17-4PH stainless steel sheet is used in food processing equipment due to its corrosion resistance, hygienic properties, and ease of cleaning.
Overall, the combination of high strength, excellent corrosion resistance, and versatility makes 17-4PH stainless steel sheet a popular choice for a wide range of applications in various industries.













