230®

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

 NiCrWMoCoAlLaMnCSiPhSBTiCuFe
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