Nickel > Castings & Forgings > Monel 502

This nickel-copper alloy, similar to Monel K500, has better machinability. It may be precipitation hardened by heat treatment for good strength.

Applications: The alloy is used for pump shafting, fasteners, and valve components as well as finding application for propeller shafts.

Machinability: This alloy is similar to Monel K500, but with improved machinability. It machines much the same as the austenitic (300 Series) stainless steels.

Forming: The alloy has good ductility and is readily formed by conventional methods.

Welding: Weldability is good by conventional means.

Heat Treatment: This alloy responds to a precipitation hardening heat treatment and to annealing.

Forging: May be forged at temperatures of 2100 F to 1850 F. Water quench after forging.

Hot Working: Hot work temperature range is 2100 F to 1600 F. Do not allow the product to slow cool in air, rather it should be cooled from 1450 F (or higher) by quenching.

Cold Working: The alloy has good ductility and may be cold worked by conventional means.

Annealing: Annealing is done at 1900 F and water quench.

Aging: Aging is done at 1100 F to 1125 F for 16 hours, followed by slow furnace cooling at a rate of 25 F per hour to 900 F. Cooling rate from 900 F is not critical.

Hardening: See “Aging”.

Other Mechanical Props: Tensile data is for age hardened.