Difference Between Inconel and Nimonic
Inconel
Inconel is a family of austenitic nickel-chromium-based superalloys while Nimonic alloys typically consist of more than 50% nickel and 20% chromium with additives such as titanium and aluminium. Nimonic & Inconel are registered trademark of Special Metals Corporation.
Inconel Composition
Inconel |
Element (% by mass) |
Ni |
Cr |
Fe |
Mo |
Nb |
Co |
Mn |
Cu |
Al |
Ti |
Si |
C |
S |
P |
B |
600 |
72.0 |
14.0–17.0 |
6.0–10.0 |
|
|
|
1.0 |
0.5 |
|
|
0.5 |
0.15 |
0.015 |
|
|
617 |
44.2–56.0 |
20.0–24.0 |
3.0 |
8.0–10.0 |
|
10.0–15.0 |
0.5 |
0.5 |
0.8–1.5 |
0.6 |
0.5 |
0.15 |
0.015 |
0.015 |
0.006 |
625 |
58.0 |
20.0–23.0 |
5.0 |
8.0–10.0 |
3.15–4.15 |
1.0 |
0.5 |
|
0.4 |
0.4 |
0.5 |
0.1 |
0.015 |
0.015 |
|
690 |
59.5 |
30 |
9.2 |
|
|
|
0.35 |
0.01 |
0.02 |
|
0.35 |
0.019 |
0.003 |
|
|
718 |
50.0–55.0 |
17.0–21.0 |
balance |
2.8–3.3 |
4.75–5.5 |
1.0 |
0.35 |
0.2–0.8 |
0.65–1.15 |
0.3 |
0.35 |
0.08 |
0.015 |
0.015 |
0.006 |
X-750 |
70.0 |
14.0–17.0 |
5.0–9.0 |
|
0.7–1.2 |
1.0 |
1.0 |
0.5 |
0.4–1.0 |
2.25–2.75 |
0.5 |
0.08 |
0.01 |
|
|
Inconel alloys
Alloys of inconel include:
- Inconel 600: Solid solution strengthened
- Inconel 601
- Inconel 625: Acid resistant, good weldability. The LCF version is typically used in bellows.
- Inconel 690: Low cobalt content for nuclear applications, and low resistivity
- Inconel 713C: Precipitation hardenable nickel-chromium base cast alloy
- Inconel 718: Gamma double prime strengthened with good weldability
- Inconel 751: Increased aluminium content for improved rupture strength in the 1600 °F range
- Inconel 792: Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines
- Inconel 939: Gamma prime strengthened to increase weldability
Inconel Equivalent Grades
STANDARD |
WERKSTOFF NR. |
UNS |
GOST |
AFNOR |
JIS |
BS |
EN |
OR |
600 |
2.4816 |
N06600 |
МНЖМц 28-2,5-1,5 |
NC15FE11M |
NCF 600 |
NA 13 |
NiCr15Fe |
ЭИ868 |
601 |
2.4851 |
N06601 |
XH60BT |
NC23FeA |
NCF 601 |
NA 49 |
NiCr23Fe |
ЭИ868 |
617 |
2.4663 |
N06617 |
|
|
|
|
|
|
625 |
2.4856 |
N06625 |
ХН75МБТЮ |
NC22DNB4M |
NCF 625 |
NA 21 |
NiCr22Mo9Nb |
ЭИ602 |
690 |
2.4642 |
N06690 |
|
|
|
|
|
|
718 |
2.4668 |
N07718 |
|
|
|
|
|
|
725 |
- |
N07725 |
|
|
|
|
|
|
X-750 |
2.4669 |
N07750 |
|
|
|
|
|
|
Inconel Melting Point, Density and Tensile Strength
|
Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
600 |
8.47 g/cm3 |
1413 °C (2580 °F) |
Psi – 95,000 , MPa – 655 |
Psi – 45,000 , MPa – 310 |
40 % |
601 |
8.1 g/cm3 |
1411 °C (2571 °F) |
Psi – 80,000 , MPa – 550 |
Psi – 30,000 , MPa – 205 |
30 % |
617 |
8.3g/cm³ |
1363°C |
≥ 485 MPa |
≥ 275 MPa |
25 % |
625 |
8.4 g/cm3 |
1350 °C (2460 °F) |
Psi – 135,000 , MPa – 930 |
Psi – 75,000 , MPa – 517 |
42.5 % |
690 |
8.3g/cm³ |
1363°C |
≥ 485 MPa |
≥ 275 MPa |
25 % |
718 |
8.2 g/cm3 |
1350 °C (2460 °F) |
Psi – 135,000 , MPa – 930 |
Psi – 70,000 , MPa – 482 |
45 % |
725 |
8.31 g/cm3 |
1271°C-1343 °C |
1137 MPa |
827 MPa |
20 % |
X-750 |
8.28 g/cm3 |
1430°C |
1267 MPa |
868 MPa |
25 % |
Nimonic
Nimonic grades:
- Nimonic 75
- Nimonic 81
- Nimonic 86
- Nimonic 80/80A
- Nimonic 90
- Nimonic 105
- Nimonic 115
- Nimonic 263
- Nimonic 901
Nimonic Equivalent Grades
STANDARD |
WERKSTOFF NR. |
UNS |
Nimonic® 75 |
2.4951 |
N06075 |
Nimonic® 80 |
2.4952 |
N07080 |
Nimonic® 81 |
|
|
Nimonic® 86 |
|
|
Nimonic® 115 |
2.4636 |
|
Nimonic® 263 |
2.4650 |
N07263 |
Nimonic® 901 |
2.4662 |
N09901 |
Nimonic Chemical Composition
Grade |
Ni |
Cr |
Fe |
P |
Cu |
Al |
Ti |
C |
Mn |
Si |
Co |
|
Nimonic® 75 |
Bal. |
19-22 |
Max 1.0 |
Max 0.015 |
Max 0.2 |
Max 0.15 |
0.15-0.35 |
Max 0.12 |
Max 0.70 |
Max 0.80 |
- |
Max 0.02 |
Nimonic® 81 |
63 |
≤30 |
≤1.0 |
- |
- |
0.9 |
1.8 |
- |
- |
- |
≤2 |
- |
Grade |
Ni |
Cr |
Mo |
Fe |
Cu |
Al |
Ti |
Zr |
Mn |
Si |
Co |
C |
Sulfur, S |
Boron, B |
Nimonic® 105 |
51 |
14-15.7 |
4.50-5.50 |
1 |
0.20 |
4.50-4.90 |
0.90-1.50 |
0.15 |
1 |
1 |
18-22 |
0.12 |
0.010 |
0.0030-0.010 |
Grade |
Al |
B |
C |
Cr |
Co |
Cu |
Fe |
Mn |
Ni |
P |
Si |
S |
Nimonic 80 |
1 – 1.8 |
0.008 max |
0.1 max |
18 – 21 |
0.2 max |
0.2 max |
3 max |
1 max |
Balance |
0.045 max |
1 max |
0.015 max |
Grade |
Ni |
Co |
Cr |
Mo |
Ti |
Fe |
Mn |
Al |
Si |
Cu |
C |
B |
S |
Nimonic 263 |
49 |
19-21 |
19-21 |
5.60-6.10 |
1.90-2.40 |
0.70 |
0.60 |
0.60 |
0.40 |
0.20 |
0.040 – 0.080 |
0.0050 |
0.0070 |
Weight% |
Ni |
Cr |
Mo |
Ti |
Co |
Cu |
Mn |
Si |
Al |
C |
S |
Fe |
Nimonic Alloy 901 |
42.5 |
12.5 |
5.75 |
2.9 |
1.0 max |
0.5 max |
0.5 max |
0.4 max |
0.35 max |
0.1 max |
0.03 max |
Bal |
Weight % |
Ni |
Cr |
Co |
Ti |
Al |
C |
Si |
Cu |
Fe |
Mn |
B |
S |
Zr |
Pb |
Alloy 90 |
Bal |
18-21 |
15-21 |
2-3 |
1-2 |
0.2 max |
1.0 max |
0.2 max |
1.5 max |
1.0 max |
0.02 max |
0.015 max |
0.15 max |
0.0020 max |
Nimonic Melting Point, Density and Tensile Strength
Grade |
Density |
Melting Point |
75 |
8.4 g/cm3 |
1374°C-1420 °C |
80 |
0.295 |
2450 °F |
81 |
8.06 gm/cm3 |
1357°C |
86 |
8.54 g/cm³
|
1327°C |
105 |
8.01 g/cm³ |
1327°C |
115 |
7.85 g/cm³ |
1304°C |
263 |
0.302 lb/in³ |
2372-2471°F |