AZ61 AZ61 is a medium strength wrought magnesium alloy for extrusion and forgings. The alloy contains additions of aluminum, zinc and manganese, and develops its properties without the need for heat treatment. AZ61 is fully weldable by the inert gas tungsten arc (TIG) process. Welded components may be given a stress relieving heat treatment of a short duration at moderate temperatures. Like other magnesium alloys, AZ61 offers excellent machinability. To date, the alloy has been used extensively for aerospace and defense applications.
Physical constants	Typical		Mechanical Properties	Extruded	Forged
AZ61  Al 6.0 Zn 1.0 Mn 0.3			Tensile properties	0-75 mm	0~75 mm
Elastic Modulus (GPa)	45		0.2% Proof Stress (MPa)	180	160
Density (g/cm3)	1.8		Tensile Strength (MPA)	270	275
Thermal Conductivity (W/mK)	79		ElongationC (%)	8	7
Thermal Expansion Coefficient (/K)	27.30		Compressive Properties
Electrical Resistivity (n ohm.m)	143		0.2% Proof Stress (MPa)	130~180	130~165
Specific Heat (J/Kg/°C)	1000		Compressive Strength (MPa)	370~420	340~400
Poisson's Ratio (-)	0.35		Fatigue Properties
			Un-notched (MPA)	125~135	115~125
			Notched (MPa)	90~95	80~90
			Hardness v.p.n.	60~70	60~70