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PRODUCTS
Product Details
PH-steel 15-7Mo
PH-steel 15-7Mo — UNS S15700; AISI 632; commonly known as 15-7Mo, 15-7 PH, PH 15-7 Mo, or 15-7Mo PH Stainless Steel.
PH Stainless Steel, Precipitation-Hardening Stainless Steel, Type 632, 15Cr-7Ni-2Mo-Al PH Steel, S15700.
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Category
Stainless Steel
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Grade
15-7Mo / UNS S15700 / 1.4532
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Standard
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Product Form
ASTM A693 / AMS 5520 / AMS 5521
Sheet / Strip / Coil / Spring Wire / Flat Wire / Springs / Diaphragms / Bellows / Precision Formed Parts
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Thickness
0.1–50 mm
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Width
100–2000 mm
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Length
1000–6000 mm
Features
15-7Mo is a chromium-nickel-molybdenum-aluminum semi-austenitic precipitation-hardening stainless steel designed to combine high mechanical strength with good toughness, corrosion resistance and fatigue performance.
The alloy can be formed in a relatively ductile condition before conditioning and precipitation-hardening treatments are applied. Aluminum contributes to the precipitation-hardening response, while molybdenum improves corrosion resistance compared with related precipitation-hardening grades.
After appropriate heat treatment, 15-7Mo develops high tensile and yield strength together with useful ductility and dimensional stability. Its fatigue and spring characteristics make it especially suitable for components subjected to repeated mechanical loading.
Typical applications include aerospace springs, diaphragms, bellows, retaining rings, clips, fasteners and precision-formed components where high strength and corrosion resistance are required.
Surface Finish | 2B / Bright / Ground / Polished / Pickled |
Technique | Cold Rolled / Cold Worked / Formed / Solution Treated / Conditioned / Precipitation Hardened |
Applications | Aerospace Springs, Diaphragms, Bellows, Retaining Rings, Clips, Aircraft Components, Fasteners, Precision Spring Components |
High tensile and yield strength
Excellent fatigue resistance
Good spring characteristics
Good corrosion resistance
Mo-enhanced corrosion performance
Good formability before final hardening
High hardness after precipitation hardening
Good dimensional stability
Suitable for thin precision components
Widely used in aerospace applications
Chemical Composition (%)
Mechanical Properties (Typical)
Element | Composition (%) |
Fe | Balance |
Cr | 14.00–16.00 |
Ni | 6.50–7.75 |
Mo | 2.00–3.00 |
Al | 0.75–1.50 |
Mn | ≤ 1.00 |
Si | ≤ 1.00 |
C | ≤ 0.09 |
P | ≤ 0.040 |
S | ≤ 0.040 |
Property | Typical Value |
Tensile Strength | Approx. 1,200–1,600 MPa |
Yield Strength (0.2%) | Approx. 1,000–1,400 MPa |
Elongation | Approx. 5–15% |
Hardness | Approx. 35–45 HRC |
Density | Approx. 7.8 g/cm³ |
Mechanical properties may vary depending on product form, dimensions, cold-working level, conditioning treatment, aging condition, and applicable material specification.