230®
Alloy 230 is a nickel-chromium alloy with tungsten and molybdenum additions. It boasts excellent oxidation resistance to 2100°F and superior strength at temperature. This allows alloy 230 to excel in creep and fatigue resistance at high temperatures. Alloy 230 also exhibits excellent nitriding and carburization resistance comparable to that of alloy 600. Alloy 230 is welded using 230-W weld fillers designated ERNiCrMo-1.
Chemistry
| Ni | Cr | W | Mo | Co | Al | La | Mn | C | Si | Ph | S | B | Ti | Cu | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 47.00 | 20.00 | 13.00 | 1.00 | - | 0.20 | 0.005 | 0.30 | 0.05 | 0.25 | - | - | - | - | - | - |
| MAX | 65.00 | 24.00 | 15.00 | 3.00 | 5.00 | 0.50 | 0.005 | 1.00 | 0.15 | 0.75 | 0.03 | 0.015 | 0.015 | 0.10 | 0.50 | 3.00 |
Specifications
AMS 5878
UNS N06230
W. NR./EN 2.4733
Inventory
230® Sheet, 230® Welding Products
Common Trade Names
Alloy 230, Haynes® 230
Features
- Excellent oxidation resistance to 2100°F
- Superior high temperature strength
- Resistant to grain coarsening at high temperatures
- Good resistance to nitriding and carburizing
Applications
- Transition ducts on turbine engines
- Combustion linings on turbine engines
- Furnace retorts
- Flame shrouds
- Vacuum heat treat fixtures
Physical Properties
Density: 0.324 lb/inch3
Melting Point: 2375- 2500°F
| Temperature, °F | 70 | 1000 | 1200 | 1400 | 1600 | 1800 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 7.9 | 8.1 | 8.3 | 8.6 | 8.9 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
6.2 | 13.3 | 14.8 | 16.4 | 17.9 | 19.5 |
| Modulus of Elasticity, Dynamic psi x 106 | 31 | 26 | 25 | 24 | 23 | 22 |
* 70°F to indicated temperature.
Mechanical Properties
Minimum Specified Properties, AMS 5878 Sheet
| Ultimate Tensile Strength, ksi | 115 |
| 0.2% Yield Strength, ksi | 50 |
| Elongation, % | 40 |
| Hardness MAX, Brinell | 25 |
Average Tensile Properties, Sheet
| Temperature, °F | 70 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 |
| Ultimate Tensile Strength, ksi | 122 | 102 | 97 | 78 | 45 | 25 | 13 |
| 0.2% Yield Strength, ksi | 61 | 44 | 44 | 47 | 34 | 18 | 10 |
| Elongation, % | 47 | 54 | 57 | 61 | 75 | 50 | 37 |
Typical Creep- Rupture Properties, Sheet
| Temperature, °F | 1200 | 1300 | 1400 | 1500 | 1600 | 1700 | 1800 |
| 10,000 Hour Rupture Strength, ksi | 27.0 | 18.5 | 13.2 | 8.4 | 5.6 | 3.2 | 1.1 |