NA alloys

In terms of composition, they are Al-Si-Mg-Mn alloys.

A high proof stress and high ductility are obtainable, and their corrosion resistance is also good.

The combination of Fe, Mn, and Cr prevents from sticking to the die.

For NA-3, a high proof stress is obtainable without heat treatment or with T5 treatment.
For NA-5, high ductility is obtainable without heat treatment.
NA-6 has a good balance between proof stress and ductility.
NA-8 has good castability with 8% Si, and a high proof stress and high ductility are obtainable.
DIKNA-9 has even better castability than NA-8, and high ductility is obtainable through T6 treatment at a low temperature of 450°C.
For NA-11, a high proof stress is obtainable through T5 or T6 treatment.

Table 1. Examples of the mechanical properties of NA alloys

	Cu	Si	Mg	Fe	Mn	Cr	Heat treatment	Tensile strength (MPa)	Elongation (％)	0.2% proof stress (MPa)
NA-3	–	6.32	0.83	0.45	0.44	0.11	F	314	8.5	190
NA-3	–	6.32	0.83	0.45	0.44	0.11	T5	361	5.4	284
NA-5	–	4.53	0.44	0.45	0.59	–	F	256	14.3	122
NA-5	–	4.53	0.44	0.45	0.59	–	T5	287	8.8	195
NA-6	–	6.14	0.44	0.48	0.60	–	F	288	13.0	133
							T5	320	7.4	219
							T6-1	319	10.8	261
NA-8	0.10	7.94	0.34	0.35	0.39	0.19	F	307	10.8	139
							T5	344	6.2	238
							T6-2	324	9.3	267
DIKNA-9	0.07	9.08	0.24	0.11	0.29	0.15	F	309	12.3	134
							T5	328	7.4	207
							Low-temperature T6	209	18.0	132
							T6-3	246	11.7	180
NA-11	1.01	7.99	0.62	0.27	0.37	0.19	F	356	7.3	183
							T5	385	5.1	265
							T6-2	397	8.4	315
DIK365 (conventional material)	0.01	9.98	0.43	0.12	0.56	0.01	F	323	8.8	159
							T5	361	6.1	258
							T6-2	317	6.5	265
ADC12	Within the JIS range						F	345	2.3	149

Parts requiring a high proof stress and high ductility

NA-3, NA-5, NA-6, NA-8, and NA-11 have been patented.
* DIKNA-9 is covered by the patent for NA-8.

Remarks

Please note that the figures described in the above technical data are based on our measurements and are not guaranteed.

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