Incoloy 25-6HN

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Incoloy 25-6HN

INCOLOY alloy 25-6HN is a super-austenitic stainless steel containing 6% molybdenum. The alloy’s proper-ties are enhanced by its content of nitrogen. Its high content of nickel results in thermal stability and re-sistance to stress corrosion cracking. Designated as UNS N08367, alloy 25-6HN directly competes with similar super-austenitic stainless steels. Alloy 25-6HN is a new addition to Special Metals existing line of high performance, super-austenitic stainless steels, IN-COLOY alloys 25-6MO and 27-7MO. The chemical com-position of alloy 25-6HN is reported in Table 1.

%Chemical Composition

Si S P Mn Cu N Mo Ni Cr Fe
0.3 0.001 0.02 0.4 0.25 0.21 6.3 24.3 20.6 Balance

Density & Melting Range

Melting Range (Celsius) Density
1404 – 1354 (g/cm) 8.02

Mechanical Properties

 Hardness, HRB % Elongation Tensile Strength (ksi) Yield Strength (ksi)
90 48 107 55


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