Both 6063 and 6063A are forged Al-Mg-Si alloy, which can be strengthened by heat treatment. 6063A alloy belongs to high quality product, its chemical composition and quality are stricter than 6063 aluminum alloy. The two kinds of aluminium alloys have medium strength and high plasticity after solution heat treatment and aging treatment. The corrosion resistance of the alloy is slightly better than that of 6061 aluminum alloy. Good weldability, medium to low machinability of alloy.


 
  

Tensile properties and hardness at high temperature of 6063 alloy
Temper	Temperature/℃	Tension strength Rm/MPa	Prescribed plastic elongation strength  Rp0.2/MPa	Elongation A (%)
T4	100	152	97	18
	150	145	103	20
	205	62	45	40
	260	31	24	75
	315	23	17	80
	370	16	14	105
T5	100	165	138	18
	150	138	124	20
	205	62	45	40
	260	31	24	75
	315	23	17	80
	370	16	14	105
T6	100	214	193	15
	150	145	133	20
	205	62	45	40
	260	31	24	75
	315	23	17	80
	370	16	14	105

 
 

Low Temperature Tensile Properties of 6061 Alloy
Temper	Temperature /℃	Tension strength Rm/MPa	Prescribed plastic elongation strength  Rp0.2/MPa	Elongation A (%)
T4	-196	234	110	44
	-80	179	103	36
	-28	165	97	34
	25	152	90	33
T5	-196	255	165	28
	-80	200	152	24
	-28	193	152	23
	25	186	145	22
T6	-196	324	248	24
	-80	262	228	20
	-28	248	221	19
	25	241	214	18

 
6063 and 6063A alloys have high process plasticity in hot state. They can extrude or forge profiles and forgings of various cross-section shapes.
 
 
For parts in T5 state, the temperature of artificial aging treatment can be increased to 185 - 200 ℃ for 1 hour.
 

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