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Carbon		0.015 max
Chromium		14 - 18
Cobalt		2 max
Iron		3 max
Manganese		1 max
Molybdenum		14 - 17
Nickel		Balance
Phosphorus		0.04 max
Silicon		0.08 max
Sulphur		0.03 max
Titanium		0.7 max

Principal Design Features		Alloy C-4 is a wrought nickel-chromium-molybdenum alloy for high temperature use with good corrosion resistance.

Applications		This alloy is used to manufacture chemical process equipment, especially for process use at high temperatures where stainless steels do not have adequate strength and/or corrosion resistance.

Machinability		Machinable by conventional techniques.

Forming		Readily formed by conventional methods.

Welding		All of the common methods of welding apply to this alloy. However excessive heat input should be avoided and submerged arc or oxy-acetylene welding should not be used as they can degrade corrosion resistance.

Heat Treatment		Solution annealed at 1950 F and rapid quench. This is the normal condition in which product forms are supplied.

Forging		The alloy can be hot forged at temperatures of 2150 F to 1750 F.

Hot Working		Can be hot worked or hot extruded similar to stainless steels.

Cold Working		Readily cold worked by conventional means.

Annealing		Solution anneal at 1950 F followed by rapid quench.

Aging		May be aged (after solution heat treatment) at 1200 F for 10 hours to somewhat improve ductility and yield strength without adversely affecting the ultimate tensile strength.

Hardening		Hardened by cold working only, but normally used in the solution annealed condition.

Physical Data : [top]

Density (lb / cu. in.)	0.312
Specific Gravity	8.64
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.102
Electrical Resistivity (microhm-cm (at 68 Deg F))	748
Melting Point (Deg F)	2600
Thermal Conductivity	79
Mean Coeff Thermal Expansion	6
Modulus of Elasticity Tension	30.8

Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		70
Tensile Strength		116
Yield Strength		61
Elongation		54
Rockwell		B92
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		400
Tensile Strength		98
Yield Strength		46
Elongation		55
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		600
Tensile Strength		98
Yield Strength		44
Elongation		59
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		800
Tensile Strength		93
Yield Strength		44
Elongation		63
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		1000
Tensile Strength		94
Yield Strength		43
Elongation		55
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		1200
Tensile Strength		83
Yield Strength		42
Elongation		50
Form		Sheet
Condition		Heat treated at 1950 F(1066 C)
Temper		1400
Tensile Strength		70
Yield Strength		38
Elongation		44