Difference Between Inconel and Stainless Steel
Inconel Vs Stainless Steel
Inconel
Inconel, a product of Special Metals Corp., has a nickel, chromium and molybdenum composition. Inconel is resistant to corrosion and pitting and comes in several different alloys. Stainless steel is composed of carbon, manganese, phosphorus, sulfur, silicone, chromium and nickel. Both Inconel and stainless steel use a numbering system for different alloys and strengths. These products have silver finishes, but different textures create matte or shiny surfaces.
Cost or Price Difference between Inconel & stainless steel
Inconel is more expensive than stainless steel. For example, exhaust valves for fast cars cost $150 more than stainless, at the time of publication. Special Metals Corp., the inventor of Inconel, sells this alloy in flat sheets, pipes, tubes, flat bars, wire and other shapes. Special Metals shows production of 25 qualities of Inconel. Each product has different characteristics and a different price.
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 |
---|---|---|---|---|---|---|---|---|
Inconel 600 | 2.4816 | N06600 | МНЖМц 28-2,5-1,5 | NC15FE11M | NCF 600 | NA 13 | NiCr15Fe | ЭИ868 |
Inconel 601 | 2.4851 | N06601 | XH60BT | NC23FeA | NCF 601 | NA 49 | NiCr23Fe | ЭИ868 |
Inconel 617 | 2.4663 | N06617 | ||||||
Inconel 625 | 2.4856 | N06625 | ХН75МБТЮ | NC22DNB4M | NCF 625 | NA 21 | NiCr22Mo9Nb | ЭИ602 |
Inconel 690 | 2.4642 | N06690 | ||||||
Inconel 718 | 2.4668 | N07718 | ||||||
Inconel 725 | - | N07725 | ||||||
Inconel 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 % |
Stainless Steel
Stainless Steel Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‐09 | X5CrNi18-10 |
SS 304L | 1.4306/1.4307 | S30403 | SUS 304L | 304S11 | 03Х18Н11 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 |
SS 310 | 1.4845 | S31000 | - | - | - | - | - |
SS 310S | 1.4845 | S31008 | SUS310S | - | 20Ch23N18 | - | X8CrNi25-21 |
SS 316 | 1.4401 / 1.4436 | S31600 | SUS 316 | 316S31 / 316S33 | - | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐032 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
SS 317 | 1.4449 | S31700 | SUS 317 | - | - | - | X6CrNiMo19-13-4 |
SS 317L | 1.4438 | S31703 | SUS 317L | - | - | - | X2CrNiMo18154 |
SS 321 | 1.4541 | S32100 | SUS 321 | - | 08Ch18N10T | - | X6CrNiTi18-10 |
SS 321H | 1.4541 | S32109 | SUS 321H | - | - | - | X6CrNiTi18-10 |
SS 347 | 1.4550 | S34700 | SUS 347 | - | 08Ch18N12B | - | X6CrNiNb18-10 |
SS 347H | 1.4961 | S34709 | SUS 347H | - | - | - | X7CrNiNb18-10 |
SS 446 | 1.4762 | S44600 | - | - | - | - | - |
Stainless Steel Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
SS 304 | 0.08 max | 2 max | 0.75 max | 0.040 max | 0.030 max | 18 – 20 | - | 8 – 11 | - |
SS 304L | 0.03 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | - | 8 – 12 | 0.10 max |
SS 310 | 0.25 max | 2 max | 1.50 max | 0.045 max | 0.030 max | 24 - 26 | - | 19 - 22 | - |
SS 310S | 0.08 max | 2 max | 1.50 max | 0.045 max | 0.030 max | 24 - 26 | - | 19 - 22 | - |
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 316L | 0.3 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 16 - 18 | 2 - 3 | 10 - 14 | 0.10 max |
SS 317 | 008 max | 2 max | 1 max | 0.040 max | 0.03 max | 18 - 20 | 3 - 4 | 11 - 14 | 0.10 max |
SS 317L | 0.035 max | 2 max | 1 max | 0.040 max | 0.03 max | 18 - 20 | 3 - 4 | 11 - 15 | - |
SS 321 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 - 19 | 5xC min 0.60% max |
9 - 12 | 0.10 max |
SS 321H | 0.04 - 0.10 max | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 - 19 | 4xC min 0.60% max |
9 - 12 | 0.10 max |
SS 347 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 - 20 | 10xC min 1.00 max |
9 - 13 | 62.74 |
SS 347H | 0.04 – 0.10 | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 - 20 | 8xC min 1.00 max |
9 - 13 | 62.74 |
SS 446 | 0.2 max | 1.5 max | 0.75 max | 0.040 max | 0.03 max | 23 – 30 | 0.10 – 0.25 | 0.50 max | Balance |
Stainless Steel Melting Point, Density and Tensile Strength
Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
SS 304 | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
SS 310 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 310S | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 316 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 316L | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
SS 317 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 317L | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 321 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 321H | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 347 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
SS 347H | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
SS 446 | 7.5 g/cm3 | 1510 °C (2750 °F) | Psi – 75,000 , MPa – 485 | Psi – 40,000 , MPa – 275 | 20 % |
Inconel vs stainless steel strength
Stainless Steel
Like plain steel, the term stainless steel can be applied to a wide variety of different alloys. A key characteristic of stainless steel is its protective oxide layer - which continuous exposure to extreme temperatures can damage.
There are many grades available in stainless steel, but let’s take a quick look at some of the most commonly used SS grades:
- Grade 304 Stainless Steel. Resistant to oxidation damage at temperatures of up to 1,697°F (952°C). At 2,000°F, this alloy will experience significant loss of corrosion resistance and tensile strength.
- Grade 316 Stainless Steel. While more resistant to chemical corrosion at room temperature than 304 SS, 316 SS is actually a bit less resistant to high temperatures than 304 is. At 2,000°F, this alloy loses even more tensile strength than 304 does.
- Grade 330 Stainless Steel. This stainless steel alloy is specifically formulated to resist the effects of scaling and oxidation at high temperatures. The high chromium and nickel content of this alloy helps it withstand prolonged exposure to temperatures of up to 1,900°F (1037°C). Some might recommend it for use at 2,000°F, but at that point it’s usually better to use Inconel® instead.
Inconel vs stainless steel weight
Inconel alloy have lighter weight than stainless steel. Although the appearance of stainless and Inconel might be the same, the difference in weight is obvious.
There's a world of steel & metals, Click on the below articles to check out the differences & learn more.
- Difference Between Low-Alloy Steel & High-Alloy Steel
- Differences Between 52100 & E52100 Steel
- Differences Between 304 and 316 Stainless Steel
- Differences Between A358 and A312
- Difference Between Inconel and Incoloy
- Difference Between Monel and Inconel
- Difference Between Hastelloy and Inconel
- Difference Between Inconel 625 and 825
- Difference Between Inconel 600 and 625
- Difference Between Inconel 625 and 718
- Difference Between Monel 400 and 500
- Difference Between Inconel and Monel
- Difference Between Inconel 600 and 601
- Difference Between Inconel 600 and 800
- Difference Between Inconel and Stainless Steel
- Difference Between Inconel and Nimonic
- Difference Between Inconel and Titanium
- Difference Between Duplex and Inconel
- Difference Between Inconel 825 and Incoloy 825
- Difference Between Inconel 625 and Incoloy 625
- Difference Between Inconel 800 and Incoloy 800
- Difference Between Inconel X750 and Inconel 718
- Difference Between Monel and Inconel 625
- Difference Between Nickel and Inconel
- Difference Between Inconel 600 and 718
- Difference Between Inconel 825 and 925
- Difference Between Inconel and SS 316
- Difference Between PSL1 and PSL2 Pipe
- Jindal Pipes Limited
- Stainless steel tube dimensions
- Stainless steel tube weight chart
- Carbon steel pipe sizes
- Stainless steel pipe sizes
- Alloy steel pipe sizes
Looking to buy Inconel 600 Tube? Alloy 600 Tube?
Check price of Inconel 600 Tube in India
