15-7PH, also designated UNS S15700, EN 1.4532 or X8CrNiMoAl15-7-2, is a semi-austenitic precipitation-hardening stainless steel offering high strength, good corrosion resistance and excellent spring properties. FUSHUN METAL supplies this grade under ISO 9001 and AS9120B certified quality systems.
Introduction to 15-7PH / S15700 / 1.4532 / X8CrNiMoAl15-7-2
15-7PH is widely used in aerospace, energy, chemical and general engineering for parts requiring high strength-to-weight ratio and moderate corrosion resistance. FUSHUN METAL controls melting, rolling, forging, heat treatment and testing with full traceability under ISO 9001 and AS9120B.
Similar Grades to 15-7PH / S15700 / 1.4532
| Grade | ASTM | AMS | EN | DIN | GOST | JIS |
|---|---|---|---|---|---|---|
| 15-7PH / S15700 / 1.4532 | A705 | 5659 | 10088-3 1.4532 | X8CrNiMoAl15-7-2 | — | — |
| 17-7PH / S17700 / 1.4568 | A313 / A693 | 5528 / 5644 | 10088-3 1.4568 | X7CrNiAl17-7 | — | SUS631 |
| 15-5PH / S15500 / 1.4545 | A564 / A693 | 5659 | 10088-3 1.4545 | X5CrNiCu15-5 | — | SUS XM-12 |
| 17-4PH / S17400 / 1.4542 | A564 / A693 | 5643 | 10088-3 1.4542 | X5CrNiCuNb16-4 | — | SUS630 |
FUSHUN METAL maintains dual-certified inventory for 15-7PH / S15700 / 1.4532 and provides ASTM/EN inspection certificates, PMI and full mill traceability.
Applications of 15-7PH / S15700 Components
FUSHUN METAL supplies 15-7PH for high-strength, corrosion-resistant parts. Typical parts by industry:
Springs, retaining rings, structural honeycomb panels, actuator parts, fasteners.
Valve springs, seal components, downhole tools, high-pressure fittings.
Turbine blades, compressor parts, retaining rings, high-temperature springs.
Spring seals, valve components, pump shafts, fasteners.
High-strength fasteners, diaphragm springs, washers, wear parts.
Propeller shaft sleeves, seawater pump parts, springs.
FUSHUN METAL Supply Range for 15-7PH / S15700 / 1.4532
FUSHUN METAL stocks and processes 15-7PH in the following sizes:
| Product Form | Size Range | Length |
|---|---|---|
| Hot rolled round bar | 10 – 500 mm | 3,000 – 9,000 mm |
| Hot rolled flat bar | Thickness 8 – 120 mm, Width 50 – 610 mm | 3,000 – 6,000 mm |
| Forged round bar | 100 – 1,200 mm | 2,000 – 8,000 mm |
| Forged flat / block | Thickness 80 – 800 mm, Width 200 – 2,000 mm | 1,500 – 6,000 mm |
FUSHUN METAL can provide peeled, rough turned, ground or cut-to-length bars under ISO 9001:2015 and AS9120B controls.
Chemical Composition of 15-7PH / S15700 / 1.4532 / X8CrNiMoAl15-7-2
Typical / specification composition according to AMS 5659 and EN 10088-3:
| Element | C | Mn | Si | P | S | Cr | Ni | Mo | Al |
|---|---|---|---|---|---|---|---|---|---|
| Weight % | ≤0.09 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 14.0–16.0 | 6.5–7.75 | 2.0–3.0 | 0.75–1.50 |
FUSHUN METAL verifies each heat with optical emission spectroscopy and reports traceable mill test certificates.
Mechanical Properties of 15-7PH / S15700 After Heat Treatment
Typical values after solution treatment and precipitation hardening:
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRC) |
|---|---|---|---|---|
| TH1050 | 1,240 – 1,380 | 1,030 – 1,170 | 7 – 12 | 38 – 42 |
| RH950 | 1,550 – 1,690 | 1,380 – 1,520 | 4 – 8 | 45 – 48 |
| CH900 | 1,650 – 1,790 | 1,480 – 1,620 | 2 – 5 | 48 – 50 |
FUSHUN METAL can perform mechanical testing, hardness checks and impact tests according to ASTM A370 / EN ISO 6892-1.
FAQ About 15-7PH / S15700 / 1.4532 / X8CrNiMoAl15-7-2
What is 15-7PH used for?
15-7PH is used for high-strength aerospace springs, retaining rings, structural panels, valve components, pump shafts and high-temperature fasteners.
Is 15-7PH magnetic?
Yes, 15-7PH is magnetic in the aged condition due to martensite formation. Its magnetic properties are widely used in aerospace retaining rings and solenoid parts.
Can FUSHUN METAL supply 15-7PH with ISO 9001 and AS9120B certificates?
Yes, every 15-7PH shipment from FUSHUN METAL is supported by ISO 9001:2015 and AS9120B certified quality systems, mill test certificates and full traceability.
What is the difference between 15-7PH and 17-7PH?
15-7PH contains molybdenum and aluminum, giving higher strength and better corrosion resistance than 17-7PH, especially in high-temperature applications.
Does FUSHUN METAL export 15-7PH bars and forgings?
Yes, FUSHUN METAL supplies hot rolled, forged, peeled and ground 15-7PH / S15700 bars internationally with export documentation.
