Description
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 |
DM unit
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