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Aluminium Alloy

Aluminum alloy casting is a metal forming method in which aluminum alloy materials are prepared according to standard proportions, heated to a liquid or molten state, and then poured into a mold cavity using specialized molds or appropriate processes. After cooling, the desired aluminum part is formed.

Aluminum alloy castings have advantages such as low density, high specific strength, corrosion resistance, good casting processability, and less restriction by part structural design. Compared to cast steel or cast iron parts, aluminum alloy castings of the same volume weigh only about one-third of the former. Therefore, aluminum alloy castings are widely used in industries with high lightweight requirements.

Cast aluminum alloys are classified into medium-strength alloys based on Al-Si and Al-Si-Mg-Cu; high-strength alloys based on Al-Cu; corrosion-resistant alloys based on Al-Mg; and heat-resistant alloys based on Al-Re. Most aluminum alloy castings require heat treatment to strengthen the alloy, eliminate internal stress, stabilize the microstructure, and refine part dimensions.

Aluminum alloy castings are mainly used to manufacture beams, gas turbine blades, pump bodies, brackets, wheel hubs, and engine casings. They are also used to manufacture cylinder heads, gearboxes, pistons, instrument housings, and turbocharger pump bodies for automobiles.

Aluminium and its alloys could be cast and poured by high pressure die casting, low pressure die casting, gravity casting, sand casting, investment casting and lost foam casting. Usually, the aluminum alloy castings have less weight but complex structural and better surface.

What Aluminium Alloy We Cast by Sand Casting Process:
• Cast Aluminium Alloy by China Standard: ZL101, ZL102, ZL104
• Cast Aluminium Alloy by USA Stardard: ASTM A356, ASTM A413, ASTM A360
• Cast Aluminium Alloy by other Starndards: AC3A, AC4A, AC4C, G-AlSi7Mg, G-Al12

Aluminum Alloy Castings Characteristics:
• The casting performance is similar to that of steel castings, but the relative mechanical properties decrease more significantly as the wall thickness increases
• The wall thickness of castings should not be too large, and other structural features are similar to those of steel castings
• Light weight but complex structural
• The casting costs per kg of aluminium castings are higher than that of iron and steel castings.
• If produced by die casting process, the mold and pattern cost would be much higher than other casting processes. Therefore, die casting aluminium castings would be more suitable for castings of large demanding quantity.

Typical Aluminium Alloy Castings

GG25 Gray Iron Casting

Cast Iron Brake Disc

OEM Custom Gray Iron Casting

Gray Iron Green Sand Casting

Aluminium Alloy Grade in USA			Chemical Composition
ANSI	ASTM	UNS	Si	Fe	Cu	Mn	Mg	Ni	Zn	Sn	Ti	others	Al
360	SG100B	A03600	9.0-10.0	2	0.6	0.35	0.40-0.60	0.5	0.5	0.15		0.25	rest
A360.0	SG100A	A13600	9.0-10.0	1.3	0.6	0.35	0.40-0.60	0.5	0.5	0.15		0.25	rest
380	SC84B	A03800	7.5-9.5	2	3.0-4.0	0.5	0.1	0.5	3	0.35		0.5	rest
A380.0E	SC84A	A13800	7.5-9.5	1.3	3.0-4.0	0.5	0.1	0.5	3	0.35		0.5	rest
383.0E	SC102A	A03830	9.5-11.5	1.3	2.0-3.0	0.5	0.1	0.3	3	0.15		0.5	rest
384.0E	SC114A	A03840	10.5-12.0	1.3	3.0-4.5	0.5	0.1	0.5	3	0.35		0.5	rest
390	SC174A	A03900	16.0-18.0	1.3	4.0-5.0	0.1	0.45-0.65		0.1		0.2	0.2	rest
B390.0	SC174B	A23900	16.0-18.0	1.3	4.0-5.0	0.5	0.45-0.65	0.1	1.5		0.1	0.2	rest
392	S19	A03920	18.0-20.0	1.5	0.40-0.80	0.20-0.60	0.80-1.20	0.5	0.5	0.3	0.2	0.5	rest
413	S12B	A04130	11.0-13.0	2	1	0.35	0.1	0.5	0.5	0.15		0.25	rest
A413.0	S12A	A14130	11.0-13.0	1.3	1	0.35	0.1	0.5	0.5	0.15		0.25	rest
C433.0	S5C	A34430	4.5-6.0	2	0.6	0.35	0.1	0.5	0.5	0.15		0.25	rest
518	G8A	A05180	0.35	1.8	0.25	0.35	7.5-8.5	0.15	0.15	0.25		0.25	rest

European Alloy Grade	Chemical Composition										Tensile Strength Mpa ≥	Yield Strength Mpa ≥	Elongation %≥	Hardness HB ≥
	Si	Fe	Cu	Mn	Mg	Ni	Zn	Pb	Sn	Ti
ENAC-43400	9	0.45	0.08	0.55	0.2	0.15	0.15	0.15	0.05	0.15	240	140	1	70
	11	0.9			0.5
ENAC-44300	10.5	0.45	0.08	0.55			0.15			0.15	240	130	1	60
	13.5	0.9
ENAC-44400	8	0.55	0.08	0.5	0.1	0.05	0.15	0.05	0.05	0.15	240	120	2	55
	11
ENAC-46000	8	0.6	2	0.55	0.15	0.55	1.2	0.35	0.25	0.2	240	140	1	80
	11	1.1	4		0.55
ENAC-46100	10	0.45	1.5	0.55	0.3	0.45	1.7	0.25	0.25	0.2	240	140	1	80
	12	1	2.5
ENAC-46200	7.5	0.8	2	0.15	0.15	0.35	1.2	0.25	0.15	0.2	240	140	1	80
	9.5		3.5	0.65	0.55
ENAC-46500	8	0.6	2	0.55	0.15	0.55	3	0.35	0.25	0.2	240	140	<1	0
	11	1.2	4		0.55
ENAC-47100	10.5	0.6	0.7	0.55	0.35	0.3	0.55	0.2	0.1	0.15	240	140	1	0
	13.5	1.1	1.2
ENAC-51200	2.5	0.45	0.1	0.55	8	0.1	0.25	0.1	0.1	0.15	200	130	1	0
		0.9			10.5