Difference Between Inconel and SS 316
Inconel
Inconel is a family of austenitic nickel-chromium-based superalloys.
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 |
Alloy 600 |
2.4816 |
N06600 |
МНЖМц 28-2,5-1,5 |
NC15FE11M |
NCF 600 |
NA 13 |
NiCr15Fe |
ЭИ868 |
Alloy 601 |
2.4851 |
N06601 |
XH60BT |
NC23FeA |
NCF 601 |
NA 49 |
NiCr23Fe |
ЭИ868 |
Alloy 617 |
2.4663 |
N06617 |
|
|
|
|
|
|
Alloy 625 |
2.4856 |
N06625 |
ХН75МБТЮ |
NC22DNB4M |
NCF 625 |
NA 21 |
NiCr22Mo9Nb |
ЭИ602 |
Alloy 690 |
2.4642 |
N06690 |
|
|
|
|
|
|
Alloy 718 |
2.4668 |
N07718 |
|
|
|
|
|
|
Alloy 725 |
- |
N07725 |
|
|
|
|
|
|
Alloy 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 % |
316 Stainless Steel
Stainless Steel 316 is also known as AISI 316. Stainless Steel 316 has slightly better corrosion resistance than 302 and 304. It also has better non-magnetic properties.
SS 316 Equivalent Grades
STANDARD |
WERKSTOFF NR. |
UNS |
JIS |
BS |
GOST |
AFNOR |
EN |
SS 316 |
1.4401 / 1.4436 |
S31600 |
SUS 316 |
316S31 / 316S33 |
- |
Z7CND17‐11‐02 |
X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
SS 316 Composition
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
SS 316 |
0.08 max |
2 max |
0.75 max |
0.045 max |
0.030 max |
16 - 18 |
2 - 3 |
10 - 14 |
0.1 max |
SS 316 Melting Point, Density and Tensile Strength
Grade |
Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
SS 316 |
8.0 g/cm3 |
1454 °C (2650 °F) |
Psi – 75000 , MPa – 515 |
Psi – 30000 , MPa – 205 |
35 % |