2A14 is a high strength forged Al-Cu-Mg-Si alloy, which can be heat-strengthened. From the point of view of chemical composition and properties, it can belong to hard aluminium alloy and forged aluminium alloy. It differs from 2A50 forged aluminium alloy in that the copper content of the alloy is more than double that of 2A50 alloy. The strength of the alloy after solution treatment and artificial aging is higher than that of 2A50, but its corrosion resistance is general and worse than that of 2A50. There is a tendency of intergranular corrosion and stress corrosion under artificial aging. The plasticity of the alloy is moderate, and the plasticity is not as good as that of 2A50 under hot condition. It has extrusion effect, indicating that the longitudinal and transverse properties of the alloy are different. It has good weldability and is suitable for resistance spot welding and seam welding. Its machinability is good.



 
2A14 aluminium forgings alloy is used to manufacture free forgings and die forgings under high loads, as well as large frames, bridges, large shells, truck components, etc. However, due to the difficulty of hot pressing, the application range of the alloy is limited.
 

2A14 Mechanical properties of die forgings and free forgings
	Temper	Direction	Tension strength Rm/MPa	Prescribed plastic elongation strength Rp0.2/MPa	Elongation A (%)
Free forgings	T4	Portrait	380	245	10
	T6	Portrait	410	－	8
Die forgings	T4	Portrait	380	245	11
	T6	Portrait	430	315	10

 

Tensile Properties of 2A14 Die Forging and Free Forging at Room Temperature
	Temper		Dimension/mm	Tension strength Rm/MPa	Prescribed plastic elongation strength  Rp0.2/MPa	Elongation A (%)
Die forgings	T6		≤50	450	385	6
			>50--76	450	380	6
			>76--100	435	380	6
Free forgings	T6	L	50--76	440	385	8
		L-T		440	380	3
		S-T		425	380	2
Room temperature hardness: Brinell hardness of 2A14 alloy in O state is 45 HBW, Bush hardness in T6 state is 135 HBW.

 
 

Tensile Properties of 2A14 Aluminum Alloy Forgings Stabilized at Room Temperature
Temper	Stabilization treatment		Tension strength Rm/MPa	Prescribed plastic elongation strength   Rp0.2/MPa	Elongation A (%)
	Temperature/℃	Holding time/h
T6	130	10	510	431	7
		100	520	422	8
		1000	520	431	8
T6	150	10	500	451	8
		100	495	456	7
		1000	490	441	8

 

Type	Alloy	Projected area（m2）Or weight（kg）	Temper	Standard
Free forgings	5 series	≤3000kg	O、F	GBn223     ASTMB247
	2、6、7 series	≤3000kg	T6、T4、O、F
Mould forgings	5 series	≤2.5m2	O、F
	2、6、7 series	≤2.5m2	T6、T4、O、F