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