Stel World GMBH manufactures 422 Stainless Steel bolts, rod assemblies, studs, hex nuts, and 12- point flange nuts to your custom specifications, and we guarantee to meet your delivery schedule. At Stel World GMBH and Manufacturing Co., Inc. we strive to provide our customers with the most innovative products and quality materials in the industry.
422 Stainless is a hardenable matensitic stainless steel which is being widely used for temperatures up to 1,200°F. It has excellent creep-rupture properties in the range of 600/1,200 ° F and is capable of being heat treated to various high strength levels depending on section, form, and application involved.
422 Stainless has good resistance to scaling and oxidation. Through heat treatment, high mechanical properties can be developed. 422 Stainless is used in applications such as compressors, or steam turbines and also in aircraft parts, valves, and high temperature bolting.
Chemical
| Carbon | Chromium | Nickel | Molybdenum | Tungsten | |
| 0.23 | 11.50 | 0.80 | 1.00 | 1.00 | |
| Copper | Sulfur | Phosphorus | Silicon | Manganese | Iron |
| 0.030 max | 0.040 max | 1.0 max | 0.75 | Balance |
Mechanicals
| Tensile Strength, ksi | 75 |
|---|---|
| 0.2% Yield Strength, ksi | 30 |
| Elongation, % | 40 |
| Hardness Max, Brinell | 201 |
| Temperature, °F | 68 | 400 | 800 | 1000 | 1200 | 1350 | 1500 |
|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength, ksi | 93.3 | 73.6 | 69.5 | 63.5 | 52.3 | 39.3 | 26.4 |
| 0.2% Yield Strength, ksi | 36.5 | 36.6 | 29.7 | 27.4 | 24.5 | 22.8 | 18.6 |
Features
- Good creep strength up to 1500°F
- Maintains good corrosion resistance in applications where the temperature is between 800°F and 1500°F.
- Good resistance to intergranular corrosion in the as welded condition.
Applications
- Oil Refineries
- Fluid catalytic cracking units (FCC)
- Hanger rods
- Recuperator tube sheets, shell, supports
- Especially where temperatures exceed 550°F and resistance to sulfidation is needed
- Fired heater tubes
- Distributor trays and thermowells
- Equipment in and around reactors (good resistance to polythionic acid)