PH 13-8 Mo stainless 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.
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 tempratures.
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.
*PH 13-8 Mo stainless is a registered trademark of Armco Inc.
Corrosion Resistance
In condition H 950, PH 13-8 Mo stainless has rusting resistance similar to that of Type 304 Stainless in 5 weight percent salt fog. In strongly oxidizing and reducing acids and in atmospheric exposures, the general-corrosion resistance of PH 13-8 Mo stainless approaches that of Type 304. As with other precipitation hardening stainless steels, the alloy’s level of general-corrosion reistance is greatest in the fully hardened condition and decreased slightly as the aging temperature is increased. Numerous tests representing a marine environment have shown the alloy, in both the wrought and welded conditions, to have a high level of resistance to stress-corrosion cracking. For best resistance to stress-corrosion cracking, a minimum aging temperature of 1000°F (538°C) is suggested.
For optimum corrosion resistance, surfaces must be free of scale and foreign particles and finished parts should be passivated. Typical Stress-Corrosion-Cracking Resistance in an Atmospheric Marine Environment 0.062″ (1.57 mm) thick strip
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Additional information
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| dimension-1 | .1875", 1-1/2”, 1-1/4”, 1-1/8”, 1-11/16, 1-13/16”, 1-15/16”, 1-3/16”, 1-3/4”, 1-3/8”, 1-5/16”, 1-5/32”, 1-5/8”, 1-7/16”, 1-7/8”, 1-9/16”, 1”, 1/2", 1/4", 1/8”, 11/16", 13/16", 15/16”, 2-1/2”, 2-1/4”, 2-1/8”, 2-11/16”, 2-13/16”, 2-15/16”, 2-3/16”, 2-3/4”, 2-3/8”, 2-5/16”, 2-5/8”, 2-7/16”, 2-7/8”, 2-9/16”, 2", 3”, 3/16", 3/4", 3/8", 5/16", 5/8", 7/16", 7/8", 9/16", Other (Please Specify) |
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