Type 416 (UNS S41600)


Type 416 is a free machining high hardenability martensitic stainless steel with excellent machinability, reasonable strength and corrosion resistance.  This grade is characterized by excellent machinability, non-galling and non-seizing properties due to its higher sulfur content which has the effect of lowering its corrosion resistance. It is however resistant to mild corrosive atmospheres, fresh water, steam, organic materials, many mild acids and petroleum products in the hardened and tempered condition.  Type 416 stainless steel is magnetic in all conditions and has been used for shafts, axles, gears and pinions, lead screws, golf club heads, valve trim, bolts and nuts, and any part requiring considerable machining.

Chemical Composition

Chemical Composition (wt%) limits as specified in ASTM A582*

Carbon 0.15 Silicon 1.00
Chromium 12.0-14.0 Phosphorus 0.06
Manganese 1.25 Sulfur 0.15 min

*Maximum, unless range is indicated

Physical Properties

Physical properties for Type 416 Stainless Steel

Density, lb/in3 0.276
Modulus of Elasticity, psi 29 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F 6.5 x 10-6
Thermal Conductivity, Btu/ft hr ˚F 14.4
Specific Heat, Btu/lb ˚F 0.11
Electrical Resistivity, Microhm-in 22.4

Mechanical Properties

Mechanical property requirements for annealed product as specified in ASTM A582.

Brinell Hardness, max. 262 max


Typical standards for Type 416 Stainless Steel