PH 13-8Mo (UNS S13800 / W.Nr. 1.4534)
PH 13-8Mo (UNS S13800 / W.Nr. 1.4534) is a martensitic precipitation/age-hardening stainless steel capable of high strength and hardness along with good levels of resistance to both general corrosion and stress-corrosion cracking. In addition, the alloy exhibits good ductility and toughness in large sections in both the longitudinal and transverse directions. The excellent properties of PH 13-8 Mo stainless are obtained through close control of chemical composition and microstructure plus specialized melting which reduces impurities and minimizes segregation. Compared to other ferrous-based materials, this alloy offers a high level of useful mechanical properties under severe environmental conditions.
Equivalent Grades
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
| PH 13-8Mo | – | – | XM-13 | S13800 | X3CrNiMoAl13-8-2 | 1.4534 | – | – | – | – |
Chemical Composition, %
| Alloy | C | Si | Mn | P | S | Cr | Ni | Mo | N | Fe |
| PH 13-8Mo | ≤0.05 | ≤0.10 | ≤0.10 | ≤0.01 | ≤0.008 | 12.25-13.25 | 7.5-8.5 | 2.0-2.5 | ≤0.01 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
| 7.6 | 1030-1130 | ≥1140 | ≥1210 | ≥12 | / |
Available Products and Specifications
| Rod, Bar, Wire and Forgings | ASTM A564, 705, SAE AMS 5629 |
| Plate, Sheet and Strip | ASTM A693, SAE AMS 5604 |
| Pipe and Tube | – |
| Welding Product | – |
| Others | – |
Features
PH 13-8 Mo stainless has good fabrication characteristics and can be age-hardened by a single low temperature treatment. Cold work prior to aging increases the aging, especially for lower aging temperatures.
Applications
PH 13-8 Mo stainless has been used for valve parts, fittings, cold-headed and machined fasteners, shafts, landing gear parts, pins, lockwashers, aircraft components, nuclear reactor components and petrochemical applications requiring resistance to stress-corrosion cracking. Generally, this alloy should be considered where high strength, toughness, corrosion resistance, and resistance to stress-corrosion cracking are required in a steel showing minimal directionality in properties.
