Haynes 230 (AMS 5878 / UNS N06230 / 2.4733) stands out as a premier nickel-chromium-tungsten-molybdenum alloy renowned for its exceptional balance of strength, stability, and fabricability. Its most notable property is its outstanding resistance to oxidizing environments up to 2100°F (1149°C). Furthermore, it offers premier resistance to nitriding environments, which can cause embrittlement in lesser materials.
We maintain extensive inventory and supply a comprehensive range of Haynes 230 products, including:
- Plates & Sheets
- Pipes & Tubes
- Round Bars
- Strip, Foil, Wire
- Billet
- Flanges
Our commitment is to provide not only premium materials but also personalized service and technical support. Whether you require a standard product or a customized solution, our team is ready to assist.
Heat Treatment
Wrought 230 alloy is furnished in the solution heat treated condition, unless otherwise specified. 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 2.4733, which may marginally affect the alloy’s strength and ductility.
Chemical Composition
| Weight% | C | Mn | Si | P | S | Cr | Co | Fe | Al | Ti | B | Cu | La | W | Mo | Ni |
| Haynes 230 | 0.05-0.15 | 0.30-1.0 | 0.25-0.75 | 0.03 | 0.015 | 20.0-24.0 | 5.0 | 3.0 | 0.20-0.50 | 0.10 | 0.015 | 0.50 | 0.005-0.05 | 13.0-15.0 | 1.0-3.0 | Rem |
Mechanical Properties
| Material | Test Temp °F | Ultimate Tensile Strength | 0.2 % Yield Strength | Elongation in % | Hardness HB |
Haynes Alloy 230 Sheet
Solution Treated (AMS 5878) | RT | 793 Mpa
115 ksi | 345 Mpa
50 ksi | 40 | 25 max |
Haynes Alloy 230 Sheet
Solution Treated (AMS 5878) | 1000 | 699 Mpa
101.5 ksi | 303 Mpa
44 ksi | 53.7 | - |
Haynes Alloy 230 Sheet
Solution Treated (AMS 5878) | 1400 | 539 Mpa
78.3 ksi | 323 Mpa
46.9 ksi | 61.2 | - |
Haynes Alloy 230 Sheet
Solution Treated (AMS 5878) | 2000 | 90 Mpa
13.1 ksi | 69 Mpa
10 ksi | 37 | - |
| (Non-room temperature figures are typical only) |
Superior Fabrication and Welding
Unlike some high-performance alloys that are challenging to work with, Haynes 230 is readily fabricated and formed using standard shop equipment. Its most significant fabrication advantage is its excellent weldability. UNS N06230 can be reliably joined using a wide array of techniques, including:
- Gas Tungsten Arc Welding (GTAW/TIG)
- Gas Metal Arc Welding (GMAW/MIG)
- Shielded Metal Arc Welding (SMAW)