Nitronic 60 (UNS S21800)
Description
Nitronic 60 is known for its excellent galling resistance, even at elevated temperatures. The additions of 4% silicon and 8% manganese inhibit wear, galling, and fretting. It is commonly used for various fasteners and pins that require strength and resistance to galling. It maintains good strength up to temperatures of 1800°F and has oxidation resistance similar to that of 309 stainless steel. The general corrosion resistance is between that of 304 and 316 stainless steel.
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A276*
| Carbon | 0.10 | Silicon | 3.5-4.5 |
| Chromium | 16.0-18.0 | Phosphorus | 0.060 |
| Nickel | 8.0-9.0 | Sulfur | 0.030 |
| Manganese | 7.0-9.0 | Nitrogen | 0.08-0.18 |
*Maximum, unless range is indicated
Physical Properties
Physical properties for Nitronic 60
| Density, lb/in3 | 0.275 |
| Modulus of Elasticity, psi | 26.2 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 8.8 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.0 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microhm-in | 28.7 |
Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A276
| Yield Strength, min. (ksi) | 50 |
| Tensile Strength, min. (ksi) | 95 |
| Elongation, min. (%) | 35 |
Standards
Typical standards for Nitronic 60
| ASTM A276 |
| ASTM A479 |
| ASME SA276 |
| ASME SA479 |
| AMS 5848 |