Mar 17, 2025
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What is the difference between Inconel 750 and 718?
What is the difference between Inconel 750 and 718?
Difference between Inconel X750 and Inconel 718
X750 is a nickel-chromium alloy that is precipitation hardened by the addition of Al and Ti and has creep rupture strength at elevated temperatures up to 700°C (1290°F). INCONEL Alloy 718 (UNS N07718/W.Nr. 2.4668) is a high-strength, corrosion-resistant nickel-chromium material with a service temperature range of -423° to 1300°F.
Inconel X750
Inconel X750 Chemical Composition
| Grade |
Ni |
Cr |
Al |
C |
Mn |
Ti |
Cu |
Si |
S |
| Inconel X-750 |
70.0 min |
14.0 - 17.0 |
0.40 - 1.0 |
.08 max |
1.00 max |
2.25 - 2.75 |
0.50 max |
.50 max |
.01 max |
Inconel X750 Melting Point, Density and Tensile Strength
| Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
| 8.28 g/cm3 |
1430°C |
1267 MPa |
868 MPa |
25 % |
Inconel X750 Equivalent Grades
| STANDARD |
WERKSTOFF NR. |
UNS |
| Inconel X-750 |
2.4669 |
N07750 |
Inconel 718
Inconel 718 Chemical Composition
| Grade |
C |
Mn |
Si |
Fe |
S |
Cr |
Al |
Ni |
| 718 |
min. |
– |
– |
– |
bal |
– |
17.0 |
0.2 |
50.0 |
| max. |
0.08 |
0.35 |
0.35 |
bal |
0.01 |
21.0 |
0.8 |
55.0 |
Inconel 718 Melting Point, Density and Tensile Strength
| Element |
Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
| 825 |
8.14 g/cm3 |
1400 °C (2550 °F) |
Psi – 80,000 , MPa – 550 |
Psi – 32,000 , MPa – 220 |
30 % |
Inconel 718 Equivalent Grades
| Grade |
UNS No |
Old British |
Euronorm |
GOST |
Japanese JIS |
| BS |
En |
No |
AFNOR |
| Inconel 718 |
N07718 |
– |
– |
2.4668 |
– |
– |
– |
