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PRODUCTS
Product Details
PH-steel 13-8Mo
PH-steel 13-8Mo — UNS S13800; AMS 5629; commonly known as 13-8 Mo, PH 13-8 Mo, 13-8Mo PH Stainless Steel, or XM-13.PH Stainless Steel, Precipitation-Hardening Stainless Steel, 13Cr-8Ni-2Mo-Al PH Steel, S13800, Aerospace PH Stainless Steel.
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Category
Stainless Steel
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Grade
13-8Mo / UNS S13800 / 1.4534
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Standard
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Product Form
ASTM A564 / AMS 5629 / AMS 5864
Round Bar / Forged Bar / Billet / Forged Ring / Shaft / Landing Gear Components / Fasteners / Precision Forgings
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Thickness
5–150 mm
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Width
1000–2500 mm
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Length
1000–6000 mm
Features
13-8Mo is a low-carbon precipitation-hardening martensitic stainless steel developed to provide an excellent combination of high mechanical strength, toughness and corrosion resistance. Its carefully controlled composition makes it particularly suitable for critical high-stress components.
The alloy is strengthened through solution treatment followed by precipitation hardening. Aluminum plays an important role in the precipitation-hardening mechanism, while molybdenum contributes to strength and corrosion performance.
One of the key advantages of 13-8Mo is its combination of high strength and good fracture toughness. Controlled melting and processing practices are commonly used for demanding aerospace applications where cleanliness and mechanical-property consistency are important.
13-8Mo is widely used for aircraft structural components, landing-gear parts, shafts, fasteners, valve components and other highly loaded precision parts requiring strength, toughness and corrosion resistance.
Surface Finish | Bright / Ground / Peeled / Polished / Machined |
Technique | Vacuum Melted / Forged / Hot Rolled / Solution Treated / Age Hardened / Machined |
Applications | Aerospace Components, Landing Gear Parts, Aircraft Fittings, Shafts, Fasteners, Valve Components, Nuclear Equipment, High-Stress Structural Parts |
Exceptional tensile and yield strength
Excellent fracture toughness
High strength-to-weight performance
Good corrosion resistance
Excellent precipitation-hardening response
Good transverse mechanical properties
Good fatigue resistance
Good dimensional stability
Suitable for critical aerospace components
Suitable for highly stressed structural parts
Chemical Composition (%)
Mechanical Properties (Typical)
Element | Composition (%) |
Fe | Balance |
Cr | 12.25–13.25 |
Ni | 7.50–8.50 |
Mo | 2.00–2.50 |
Al | 0.90–1.35 |
C | ≤ 0.05 |
Mn | ≤ 0.10 |
Si | ≤ 0.10 |
P | ≤ 0.010 |
S | ≤ 0.008 |
N | ≤ 0.010 |
Property | Typical Value |
Tensile Strength | Approx. 1,380–1,520 MPa |
Yield Strength (0.2%) | Approx. 1,280–1,415 MPa |
Elongation | Approx. 10–15% |
Hardness | Approx. 40–46 HRC |
Density | Approx. 7.76 g/cm³ |
Mechanical properties may vary depending on product form, dimensions, melting practice, aging condition, and applicable material specification.