24 July 2021 HAYNES®
Haynes 230 Nickel Based Superalloy
HAYNES® 230® (UNS N06230) alloy is a nickel-chromium-tungsten-molybdenum alloy that combines excellent high-temperature strength, outstanding resistance to oxidizing envi- ronments up to 2100°F (1149°C) for prolonged exposures, premier resistance to nitriding environments, and excellent long-term thermal stability. It is readily fabricated and formed, and is castable. Other attractive features include lower thermal expansion characteristics than most high-temperature alloys, and a pronounced resistance to grain coarsening with prolonged exposure to high temperatures.+
Haynes230 is a Ni-Cr-based solid solution strengthened wrought superalloy, and its service temperature is below 900°C. The alloy contains a large amount of tungsten and a small amount of aluminum and titanium. The alloy has high plasticity and medium thermal strength, and has excellent oxidation resistance and good stamping and welding process performance. It is suitable for making parts of aero-engine main combustion chamber and afterburner, as well as heat shields, guide vanes, etc., which work for a long time below 900°C. The main products are plates, strips, wires, bars and ring parts.
The alloy has been used in the production of sheet metal stamping and welding structural parts for aero engine combustion chambers and afterburners, as well as parts such as mounting edges, ducts and guide vanes. It has reliable performance and good use.
The alloy can be welded by argon arc welding, spot welding, seam welding and brazing, and can be welded in combination with alloys such as 1Cr18Ni9Ti, GH1140, GH3030 and GH3039. Parts that work at high temperatures can be effectively protected with W-2 enamel coating.
Superalloy refers to a type of alloy material that can work for a long time at a high temperature above 600℃ and a certain stress. According to the matrix element, the superalloy can be divided into iron-based superalloy, nickel-based superalloy and cobalt-based superalloy. Corrosion-resistant alloys refer to special alloys that have the ability to resist corrosion in corrosive media, mainly including iron-based alloys (stainless steel), nickel-iron-based and nickel-based alloys. And GH3044 is one of them. Let's learn more about the metal characteristics of GH3044: GH3044 material description: This alloy is a solid solution strengthened nickel-based anti-oxidation alloy, which has high plasticity and medium thermal strength below 900 ℃, and has Excellent oxidation resistance and good stamping and welding process performance, suitable for the manufacture of main combustion chamber and afterburner parts, heat shields, guide vanes, etc. of aero engines that work for a long time below 900 ℃.
Chemical Composition:
| C | Cr | Ni | Co | W | Mo | Al | Fe | B | Si | Mn | P | S | La |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.05~0.15 | 20.0~24.0 | Balance | ≤5.0 | 13.0~15 | 1.0~3.0 | 0.20~0.50 | ≤3.0 | ≤0.015 | 0.25~0.75 | 0.30~1.00 | ≤0.030 | ≤0.015 | 0.005~0.050 |
Physical Properties:
| Young's modulus (GPa) | Shear modulus (GPa) | Poisson's ratio | Permeability | Resistivity (μΩ*cm) | Coefficient of thermal expansion (cm/cm °C) | Density (g/cm3) | Melting point (°C) |
|---|---|---|---|---|---|---|---|
| 211.5 | 78.8 | 0.34 | 1.002 | 126.3 | 12.42*10-6 | 8.91 | 1360-1410 |
Mechanical Properties:
| Tensile strength (ksi) | Yield strength (ksi) | Elongation% |
|---|---|---|
| 117-122 | 55-62 | 44-48 |
Easily Fabricated:
HAYNES® 230® alloy has excellent forming and welding characteristics. It may be forged or otherwise hot-worked, providing it is held at 2150°F (1177°C) for a time suf cient to bring the entire piece to temperature. As a consequence of its good ductility, 230® alloy is also readily formed by coldworking. All hot- or coldworked parts should be annealed and rap- idly cooled in order to restore the best balance of properties. The alloy can be welded by a variety of techniques, including gas tungsten arc (GTAW), gas metal arc (GMAW), and resistance welding.
Heat-Treatment:
HAYNES® 230alloy is furnished in the solution heat-treated condition, unless otherwise speci ed. The alloy is solution heat-treated in the range of 2150 to 2275°F (1177 to 1246°C) and rapidly cooled or water-quenched for optimum properties.
Annealing at temperatures lower than the solution heat-treating temperatures will produce some carbide precipitation in 230® alloy, which may marginally affect the alloy’s strength and ductility.
Castings:
HAYNES® 230 alloy may be cast using traditional air-melt sand mold or vacuum-melt in- vestment casting foundry practices. Silicon levels at the high end of the speci cation range are recommended for enhanced uidity. Castings may be used in either the as-cast or solution-heat-treated condition depending upon property requirements.