Alloys number

No.2

No.3

No.5

No.7

ZA8

ZA12

ZA27

Hot cracking properties
 

1

1

2

1

2

3

4

Gastight ness feature
 

3

1

2

1

3

3

4

Die Castability
 

1

1

1

1

2

3

3

Part complexity
 

1

1

1

1

2

3

3

Dimensional accuracy
 

1

1

1

1

2

2

3

Dimensional stability
 

4

2

2

1

2

3

4

Corrosion resistance
 

2

3

3

2

2

2

1

Cold shut defect
 

2

2

2

1

2

3

4

Machining feature & quality
 

1

1

1

1

3

3

4

Buffing feature & quality
 

2

1

1

1

2

3

4

Plating feature & quality
 

1

1

1

1

1

2

3

Anodizing
 

1

1

1

1

1

2

2

Chemic coating
 

1

1

1

1

2

3

3