Inconel 740H



Inconel 740H

INCONEL alloy 740H (UNS N07740) is derivation of NIMONIC alloy 263. With its higher content of chromium (24.5%), alloy 740H offers a significant improvement is resistance to high temperature corrosion mechanisms. Alloy 740H is age hardened by the precipitation of a second phase, gamma prime (γ’). By balancing the hardener content (niobium, aluminum and titanium), alloy 740H exhibits good thermal stability in addition to high strength. Nominal and limiting chemical composition ranges for alloy 740H are reported in Table1.

%Chemical Composition

Si Mo C Ti Nb Al Co Cr Ni
0.15 0.1 0.03 1.35 1.5 1.35 20 24.5 Balance

Density & Melting Range

Melting Range (Celsius) Density
1362 – 1288 (g/cm) 8.05

Mechanical Properties

(Hardness (Rockwell C % Elongation at break Elastic Modulus (GPa) Yield Strength (MPa)
33.6 36.4 221 818.4


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