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Aluminum		4 - 4.75
Carbon		0.3 max
Copper		0.25 max
Iron		0.6 max
Manganese		0.5 max
Nickel		Balance
Silicon		1 max
Sulphur		0.01 max
Titanium		0.25 - 1

Principal Design Features		This is an age-hardenable alloy, similar to Nickel 200 but with greater strength and hardness.

Applications		Applications include electrical conductivity parts, such as springs, parts that need good thermal conductivity and good fatigue strength.

Machinability		The alloy may be readily machined by conventional methods. It is not as "gummy" as Nickel 200, but because of the aluminum content it tends to be abrasive to cutting tools. Machining this alloy in the cold worked or age-hardened condition is easier than in the soft annealed condition. High-speed-steel cutting tools with a high positive rake angle should be used.

Forming		Formability by conventional means is good. Cold working does strengthen (harden) the alloy.

Welding		If welding of this alloy is required it may be done with the ordinary welding techniques. It should be welded while in the annealed condition and then stress-relieved at 1550 F for 1/2 hour. Heating to the 1550 F temperature must be done rapidly to avoid cracking.

Heat Treatment		Anneal at 1700 F for approximately 5 minutes at temperature and rapid cool or water quench. Age-hardening is accomplished at 1090 F for 16 hours and furnace cool to 900 F at a slow, furnace cooled, rate of less than 15 degrees per hour. Cooling rate after 900 F is not critical -- furnace cooling or rapid cooling may be used.

Forging		The alloy may be forged in the range of 2250 F to 1900 F.

Hot Working		Hot work in the temperature range of 2150 F to 1600 F.

Cold Working		Cold working is readily accomplished by conventional means. The alloy does work harden and, depending upon the amount of cold work, it may be necessary to give the part an intermediate anneal to complete working.

Annealing		Anneal art 1700 F for 5 minutes at temperature and rapid cool.

Aging		See "Heat Treat".

Hardening		Hardens by cold working or aging - see "Heat Treat".

Physical Data : [top]

Density (lb / cu. in.)	0.296
Specific Gravity	8.26
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.104
Electrical Resistivity (microhm-cm (at 68 Deg F))	255
Melting Point (Deg F)	2600
Poissons Ratio	0.3
Thermal Conductivity	280
Mean Coeff Thermal Expansion	7.2
Modulus of Elasticity Tension	30

Form		Strip
Condition		Test Specimen Annealed
Temper		70
Tensile Strength		105
Yield Strength		47
Elongation		40
Rockwell		B85