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process standard

30 years of good quality, focused on zinc alloy

2# casting zinc alloy GH2 content

Element	Min(%)	Max(%)
Aluminum (Al)	3.9	4.2
Magnesium (Mg)	0.035	0.05
Copper (Cu)	2.6	2.9
Lead (Pb)		0.003
Cadmium (Cd)		0.003
Tin (Sn)		0.001
Lron (Fe)		0.02
Nickel (Ni)		0.001
Silicon (Si)		0.02
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　2# casting zinc alloy has a certain growth effect at room temperature (20-25 °C) due to the copper content (3%), and has good creep resistance and resistance against GH3, GH5, GH2. The wear characteristics, its hardness is still very high for a long time, mainly used in the manufacture of metal molds and hardness injection tools. It is used to those mechanical fittings that have special need in mechanical capability, and need high rigidity and normal dimension and precision.

● Standards that GH2 complies with
● European En1774-1998ZnAl4（ZL0400，ZL3）
● USA ASTM B240-88 Z33521

3# casting zinc alloy GH3 content

Element	Min(%)	Max(%)
Aluminum (Al)	3.9	4.3
Magnesium (Mg)	0.02	0.06
Copper (Cu)		0.03
Lead (Pb)		0.003
Cadmium (Cd)		0.003
Tin (Sn)		0.001
Lron (Fe)		0.03
Nickel (Ni)		0.001
Silicon (Si)		0.02
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　3# zinc alloy has most application volume in the casting industry. Good fluidity, physical and mechanical properties are relatively stable, easy to polish, it is especially suitable for surface treatment such as electroplating, chromizing, spraying, etc. It can be used for casting toys, electronic products, case, buckles, decorations, leather accessories, home appliance refrigeration accessories.

● Standards that GH2 complies with
● China GB8738-88-ZZnAl4Y
● Australian AZ1881-1986 ZnAl4
● Japanese JIS H2201-1999 Zinc Alloy Type2
● USA ASTM B240-88 Z33521
● European EN1774-1998ZnAl4Cu（ZL0400,ZL3）

4# casting zinc alloy GH4 content

Element	Min(%)	Max(%)
Aluminum (Al)	3.8	4.3
Magnesium (Mg)	0.02	0.06
Copper (Cu)	0.2	0.4
Lead (Pb)		0.003
Cadmium (Cd)		0.003
Tin (Sn)		0.001
Lron (Fe)		0.03
Nickel (Ni)		0.001
Silicon (Si)		0.02
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　4# casting zinc alloy has a proper amount of copper, features a good release effect, and also the toughness and flexibility with GH3 alloy. It is suitable for zippers and ornaments.

5# casting zinc alloy GH5 content

Element	Min(%)	Max(%)
Aluminum (Al)	3.5	4.3
Magnesium (Mg)	0.02	0.06
Copper (Cu)	0.75	1.25
Lead (Pb)		0.003
Cadmium (Cd)		0.003
Tin (Sn)		0.001
Lron (Fe)		0.03
Nickel (Ni)		0.001
Silicon (Si)		0.02
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　The flexibility of 5# casting zinc alloy is lower than that of GH3 alloy. It may have effects on winding, bending, bending, folding, punching, potting procedures. It features high hardness and strength, good casting performance, good corrosion resistance and good wear resistance and machinability. It is applied to castings that have certain requirements on mechanical strength, such as auto parts, mechanical parts, electrical components, lighting, ceiling accessories, household and office appliances, motorcycles, automobiles, pressure reducing valves and other accessories. Electroplating and other surface treatments are the same as GH3 alloys.

● Standards that GH5 complies with
● China GB8738-88-ZZnAl4Y
● Australian AZ1881-1986 ZnAl4
● Japanese JIS H2201-1999 Zinc Alloy Type2
● USA ASTM B240-88 Z33521
● European EN1774-1998ZnAl4Cu（ZL0400,ZL3）

8# casting zinc alloy GH8 content

Element	Min(%)	Max(%)
Aluminum (Al)	8.0	8.8
Magnesium (Mg)	0.015	0.030
Copper (Cu)	0.8	1.3
Lead (Pb)		0.003
Cadmium (Cd)		0.005
Tin (Sn)		0.002
Lron (Fe)		0.05
Nickel (Ni)		0.001
Silicon (Si)		0.035
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　8# casting zinc alloy is the product by casting with GH8 alloy to meet the product requirements after casting with GH5 alloy which can not reach the wear resistance and creep resistance of the product. It is suitable for industrial and repair parts, sports and fitness equipment. Automobiles and lock components. The fluidity is inferior to GH3 zinc alloy.

● Standards that GH8 complies with
● USA ASTM B669 ZA-8

12# casting zinc alloy GH12 content

Element	Min(%)	Max(%)
Aluminum (Al)	10.5	11.5
Magnesium (Mg)	0.015	0.030
Copper (Cu)	0.5	1.2
Lead (Pb)		0.003
Cadmium (Cd)		0.005
Tin (Sn)		0.003
Lron (Fe)		0.05
Nickel (Ni)		0.001
Silicon (Si)		0.035
Lindium (In)		0.0005
Thalium (Ti)		0.001
Zinc (Zn)		Balance

　　12# casting zinc alloy is mainly casting type. It has higher strength and hardness than GH8 alloy. It is applied to workpieces with small casting size and high precision and mechanical strength. It is suitable for electric devices, sports equipment and automobiles, locks and other accessories; the fluidity is inferior to GH3 and GH5 zinc alloy.