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Aluminum		2.3 - 3.15
Carbon		0.25 max
Copper		27 - 33
Iron		2 max
Manganese		1.5 max
Nickel		Balance
Silicon		0.5 max
Sulphur		0.01 max
Titanium		0.35 - 0.85

Principal Design Features		This is an age-hardenable version of the nickel-copper alloy Monel 400. As such it has increased strength with the excellent resistance to sea water corrosion.

Applications		Sea water pump shafts and impellers as well as being used in the oil well industry for valve trim and other components.

Machinability		The best machinability for this alloy is in the annealed condition. It may be machined in the aged condition, but the preferred practice is to rough machine as close to finish as possible in the annealed condition. Then aging and final machining may be done. A very slight dimensional contraction occurs upon aging. In general this alloy, in the annealed condition, machines in a manner similar to that of the austenitic (300 series) stainless steels.

Forming		The alloy has good ductility and is readily formed in the annealed condition by standard means.

Welding		All of the conventional welding techniques may be used on this alloy. However it is best to weld with the alloy in the annealed condition and the finished weldment should then be stress-relief annealed. Exposure to temperatures in the age-hardening range (900 F to 1100 F) should be avoided except when the final age-hardening treatment is to be accomplished.

Heat Treatment		The alloy may be annealed after cold working and also may be precipitation-hardened by an aging heat treatment.

Forging		Forging should be done in the range of 2100 F to 1900 F. Water quench immediately after forging.

Hot Working		The hot work temperature range is 2100 F to 1600 F. Water quench immediately after hot working and do not allow to cool below 1600 F.

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

Annealing		Anneal at 1900 F and water quench.

Aging		For annealed, or slightly cold-worked, material age-hardening is done at 1125 F for 16 hours and then furnace cooling at a rate of 15 F to 25 F per hour down to a temperature of 900 F. Cooling rate from 900 F to room temperature is not critical. For severely cold-worked material aging should be done at 1000 F for at least 6 hours and then furnace cooled to 900 F at the 15 F to 25 F per hour rate.

Hardening		See "Aging".

Other Mechanical Props		Tensile values for annealed & aged bar.

Physical Data : [top]

Density (lb / cu. in.)	0.305
Specific Gravity	8.44
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.107
Electrical Resistivity (microhm-cm (at 68 Deg F))	370
Melting Point (Deg F)	2440
Poissons Ratio	0.32
Thermal Conductivity	121
Mean Coeff Thermal Expansion	7.6
Modulus of Elasticity Tension	26

Form		Plate
Condition		Hot Finished
Temper		70
Tensile Strength		112
Yield Strength		65
Elongation		32
Form		Plate
Condition		Hot Finished & Aged
Temper		70
Tensile Strength		160
Yield Strength		117
Elongation		25
Form		Sheet
Condition		Annealed
Temper		70
Tensile Strength		98
Yield Strength		52
Elongation		35
Rockwell		B90
Form		Strip
Condition		Annealed
Temper		68
Tensile Strength		98
Yield Strength		52
Elongation		35
Form		Strip
Condition		Spring Temper, Aged
Temper		70
Tensile Strength		195
Yield Strength		162
Elongation		7