Casting Metal Shrinkage,in. per ft
Steel 3/16to1/4
Cast Iron
Gray Iron
Ductile Iron
1/10
1/10to1/8
Aluminum Alloys
Alloys 355 and 356
Alloy 13
3/16
1/8
Copper Alloys
Chromium Copper
Tin Bronze and silicon bronze
Manganese bronze, aluminum bronze
1/4
1/8
3/16
Magnesium Alloys
Mg-Al-Zn alloys
EZ33A
HK31A, HZ32A
ZH62A
ZK51A
Unrestrained
9/64/to5/32
3/16
13/64
3/16
5/32to3/16
Restrained
1/10to 1/8
1/8to 5/32
5/32
5/32
7/64to9/64