Stainless 440 F

Annealing Procedure

Soak at 1550-1600 F(843-871 C), furnace cool.

Applications

Commonly employed in applications requiring high hardness values, non-galling and non-seizing properties in a free machining steel. Due to its inherent porosity, it should not be considered for applications involving gas or liquid under pressure.

Cold Workability

Not generally used in forming operations, this alloy can withstand moderate deformation in the fully annealed condition.

Hardening Procedure

Soak at 1850-1950 F(1010-1066 C), air cool or warm oil quench.

Hot Workability

Similar in characteristics to high speed tool steel. Heat to 1400-1500 F(760-816 C), then on to 1900-2100 F(1038-1149 C) slowly. Finish at 1700 F(927 C), furnace cool and anneal fully after reaching room temperature for maximum properties.

Machinability

Due to its' high sulfur content, this alloy can be readily machined using all common methods. Sulfur causes easy chip breakage and acts as a lubricant during machining.

Principle Design Features

This alloy is a free machining, high carbon, heat treatable metal combining elevated hardness and moderate corrosion resistance.

Tempering Procedure

For maximum hardness, soak 1 hour at 300-350 F(149-177 C). This will yield Rc 56 minimum.

Weldability

Not recommended for welding .