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ASTM A240 17-4 PH Stainless Steel Plate UNS S17400 with Precipitation Hardening and High Strength
| MOQ: | 5Ton |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A240 17-4 PH stainless steel plate for global distributors, fabricators, equipment manufacturers, and EPC contractors requiring high strength combined with good corrosion resistance. Produced to ASTM A240/A240M as UNS S17400 (also equivalent to EN 1.4542, Type 630, and SUS 630), this precipitation-hardening martensitic stainless steel is widely used in aerospace, chemical processing, nuclear, and general industrial applications.
17-4 PH is distinguished by its chromium-nickel-copper composition with niobium/columbium additions, enabling precipitation hardening through a simple low-temperature aging treatment. In the solution-annealed Condition A, the alloy has a martensitic structure and can be further strengthened by aging at temperatures ranging from 900°F to 1150°F (482°C to 621°C), producing a wide range of strength and toughness combinations. The H900 condition achieves the highest strength with tensile up to 195 ksi (1340 MPa) and hardness of 43-45 HRC, while higher aging temperatures (H1025, H1075, H1150) provide improved toughness and ductility. The alloy maintains high strength up to approximately 600°F (316°C).
| Dimension | Specification |
|---|---|
| Product Name | ASTM A240 17-4 PH Stainless Steel Plate |
| Product Alias | UNS S17400 Plate / EN 1.4542 Plate / Type 630 Plate / SUS 630 Sheet / X5CrNiCuNb16-4 / 17-4PH |
| Material Type | Precipitation Hardening Martensitic Stainless Steel |
| Key Feature | Precipitation hardening via single-step aging treatment (900-1150°F); H900 up to 45 HRC; high strength maintained to 600°F |
| Chemical Composition | Cr 15.0-17.5% / Ni 3.0-5.0% / Cu 3.0-5.0% / Nb 0.15-0.45% / C ≤0.07% / Fe Balance |
| Mechanical Properties | Tensile ≥1100 MPa / Yield ≥1000 MPa / Elongation ≥5-12% / Hardness ≤38 HRC (Condition A); H900 up to 45 HRC |
| Physical Properties | Density 7.75-7.80 g/cm3 / Melting Point 1404-1440°C / Elastic Modulus ~197-200 GPa |
| Manufacturing Process | Hot Rolling / Cold Rolling / Solution Annealing 1020-1060°C / Precipitation Hardening 482-621°C |
| Surface Finish | 2B / BA / No.1 / No.4 / HL / 8K |
| Primary Applications | Aerospace Fittings / Nuclear Reactor Components / Chemical Processing / Valve Parts / Fasteners / Turbine Blades |
| Parameter | Available Options |
|---|---|
| Product Standard | ASTM A240/A240M, ASTM A693, ASME SA-693, AMS 5604, AMS 5643 |
| Grade Equivalents | UNS S17400 / EN 1.4542 / JIS SUS 630 |
| Thickness | Cold Rolled: 1.0-6.0mm; Hot Rolled: 3.0-200mm (heavier on request) |
| Width | 1000mm, 1219mm (4ft), 1500mm, 2000mm, or customized |
| Length | 2000mm-6000mm (standard 4×8ft: 1219×2438mm) or customized |
| Surface Finish | 2B / BA / No.1 / No.4 / HL / 8K |
| Edge Condition | Mill Edge / Slit Edge / Sheared Edge |
| Heat Treatment | Condition A (solution annealed): 1020-1060°C / Aging: H900 (482°C), H1025 (552°C), H1075 (580°C), H1150 (621°C) |
| Inspection | PMI / Tensile Test / Hardness Test / Intergranular Corrosion Test |
| Documents | MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A240 17-4 PH stainless steel plate is specified for applications requiring high strength with good corrosion resistance, where austenitic grades like 304 or 316 provide insufficient mechanical performance and martensitic grades offer inadequate corrosion protection.
Typical applications include:
- Aerospace: aircraft fittings, fasteners, missile fittings, jet engine parts
- Nuclear: reactor components and pressure vessel internals
- Chemical and petrochemical processing equipment
- General industrial: valve parts, pump shafts, bushings, gears
- Food processing and paper mill equipment
- Offshore and marine components
Key selection considerations: 17-4 PH offers corrosion resistance comparable to Type 304 in most media and superior to 400-series martensitic grades. The alloy can be tailored through heat treatment: H900 for maximum strength (43-45 HRC), H1025/H1075 for balanced strength and toughness, and H1150 for improved ductility and dimensional stability. The material is magnetic in all conditions and maintains high strength to 600°F (316°C). In seawater or marine environments, the alloy may develop pitting and crevice attack in stagnant conditions, requiring careful design considerations.
Shangyou Stainless Steel provides value-added processing including cut-to-length, slitting, polishing, laser cutting, bending and forming, and protective film application.
All plates are packed with export-standard protection including protective paper between sheets, edge protection, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.
1. What is 17-4 PH stainless steel?
17-4 PH (UNS S17400, Type 630) is a martensitic precipitation-hardening stainless steel containing 15-17.5% Cr, 3-5% Ni, and 3-5% Cu. It achieves high strength through a single-step aging heat treatment.
2. What does "PH" stand for in 17-4 PH?
PH stands for Precipitation Hardening, a heat treatment process where copper-rich precipitates form in the martensitic matrix, significantly increasing strength and hardness.
3. What are the common aging conditions for 17-4 PH?
Common conditions include H900 (482°C, highest strength), H1025 (552°C), H1075 (580°C), and H1150 (621°C, best toughness and ductility).
4. What is the maximum hardness of 17-4 PH?
In the H900 condition, 17-4 PH can achieve hardness of 43-45 HRC with tensile strength up to 195 ksi (1340 MPa).
5. What thickness ranges are available for 17-4 PH plate?
Cold rolled sheet from 1.0mm to 6.0mm; hot rolled plate from 3.0mm to 200mm. Heavier thicknesses available on request.
6. Is 17-4 PH stainless steel magnetic?
Yes. 17-4 PH is martensitic and magnetic in all conditions, including solution-annealed and aged states.
7. Can 17-4 PH be welded?
Yes. 17-4 PH offers good weldability. Post-weld aging is typically recommended to restore mechanical properties in the heat-affected zone.
8. What documents are provided with delivery?
MTC 3.1, inspection reports, packing list, and heat number traceability.
9. Is third-party inspection available?
Yes, SGS, TUV, or BV upon request.
10. What are typical applications for 17-4 PH?
Aircraft fittings, nuclear reactor components, chemical processing equipment, valve parts, pump shafts, fasteners, and turbine blades.
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