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Inconel
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Introduction to Inconel
A nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy's matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.
Available Product Forms:
Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon, wire and extruded section
Inconel 600
Inconel 600 is a nickel-chromium alloy with good oxidation resistance at high temperatures and resistance to chloride ion stress-corrosion cracking, corrosion by high-purity water, and caustic corrosion. Used for furnace components, in chemical and food processing, in nuclear engineering, and for sparking electrodes.
Typical Analysis in Percent:
| Ni (+Co) |
72% |
| Cr |
14–17% |
| Fe |
6-10 % |
| C |
15% |
| Mn |
1% |
| Si |
0.5% |
| Cu |
0.5% |
| Physical Properties |
| Density |
8.47 g/cm3 |
| Melting Point/Range |
1355 - 1413 oC (2470 - 2575 oF) |
| Specific Heat |
444 (J/kg · K), 0.106 ( Btu/lb · oF) |
| Average Coefficient of Thermal Expansion |
13.3 (µm/m · K), 7.4 (µin/in · K) |
| Thermal Conductivity |
14.9 (W/m · K), 103 (Btu · in./ft2 · h · oF) |
| Electrical Resistivity |
1.7 (% IACS), 1030 (n · m) |
| Magnetic Permeability |
1.010 |
| Curie Temperature |
-124 oC (-192 oF) |
Typical Mechanical Properties
At Room Temperature |
| Ultimate Tensile Strength |
655 Mpa, 95ksi |
| Yield Strength (0.2 % offset) |
310 Mpa, 45ksi |
| Elongation (50 mm = 2") |
40% |
| Elastic Modulus (Tension) |
207 Gpa, 30 (106 psi) |
| Hardness |
75 HRB |
Inconel 625
Inconel 625 is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy's matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.
Typical Analysis in Percent:
| Ni |
58% min |
| Cr |
20-23% |
| Fe |
5% |
| Co |
1% |
| Mo |
8-10% |
| Nb (+Ta) |
3.15-4.15% |
| Ti |
.4% |
| Al |
.4% |
| C |
.1% |
| Mn |
.5% |
| Si |
.5% |
|
Physical Properties |
| Density |
8.44 g/cm3 |
| Melting Point/Range |
1290 - 1350 oC (2350 - 2460 oF) |
| Specific Heat |
410 (J/kg · K ), 0.098 (Btu/lb · oF) |
| Average Coefficient of Thermal Expansion |
12.8 (µm/m · K), 7.1 (µin./in. · oF) |
| Thermal Conductivity |
9.8 (W/m · K), 68 (Btu · in./ft2 · h · oF) |
| Electrical Resistivity |
1290 n · m |
|
Typical Mechanical Properties
At Room Temperature |
| Ultimate Tensile Strength |
930 Mpa, 135ksi |
| Yield Strength (0.2 % offset) |
517 Mpa, 75ksi |
| Elongation (50 mm = 2") |
42.5% |
| Elastic Modulus (Tension) |
207 Gpa, 30 (106 psi) |
| Hardness |
190 HRB |
Inconel 718Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability, including resistance to post weld cracking. The alloy has excellent creep-rupture strength at temperatures up to 700 oC (1300 oF). Used in gas turbines, rocket motors, spacecraft, nuclear reactors, pumps, and tooling.
Composition
| Ni (+Co) |
50 - 55 |
| Cr |
17 - 21 |
| Fe |
bal |
| Co |
1 |
| Mo |
2.8 - 3.3 |
| Nb (+Ta) |
4.75 - 5.5 |
| Ti |
.65 - 1.15 |
| Al |
.2 -.8 |
| C |
.08 |
| Mn |
.35 |
| Si |
.35 |
| B |
.006 |
| Cu |
.3 |
|
Physical Properties |
| Density |
8.19 g/cm3 |
| Melting Point/Range |
1260 - 1336 oC (2300 - 2437 oF) |
| Specific Heat |
435 (J/kg · K), 0.104 (Btu/lb · oF) |
| Average Coefficient of Thermal Expansion |
13.0 (µm/m · K) , 7.2 (µin./in. · oF) |
| Thermal Conductivity |
11.4 (W/m · K), 79 (Btu · in./ft2 · h · oF) |
| Electrical Resistivity |
1250 (n · m) |
| Curie Temperature |
-112 oC (-170 oF) |
|
Typical Mechanical Properties
At Room Temperature |
| Ultimate Tensile Strength |
1240 Mpa, 180ksi |
| Yield Strength (0.2 % offset) |
1036 Mpa, 150ksi |
| Elongation (50 mm = 2") |
12% |
| Elastic Modulus (Tension) |
211 Gpa, 30 (106 psi) |
| Hardness |
36 HRC |
Inconel X-750
Composition
| Ni |
50 - 55 |
| Co |
1 |
| Cr |
17 - 21 |
| Fe |
bal |
| Si |
2.8 - 3.3 |
| Mn |
4.75 - 5.5 |
| C |
.65 - 1.15 |
| Al |
.2 -.8 |
| Ti |
.08 |
| Cu |
.35 |
| S |
.35 |
| Cb+Ta |
.006 | Go to Inconel Inventory
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