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Comparison Table for Some Gray Iron Casting Grades
ASTM A48,
SAE J431, GM 274M and ASTM A126 are standards for
gray cast iron. They have
some grades which have some equal or similar mechanical properties,
such as tensile strength and
hardness.
This is a comparison table for some gray iron casting grades in
these standards:
|
Specifications |
Grade |
Tensile Strength (PSI) |
Hardness (BHN) |
|
ASTM A48 |
Class 25 |
25,000 |
170-229 |
|
SAE J431 |
G2500 |
25,000 |
170-229 |
|
GM274M |
G150 |
21,750 |
143-207 |
|
ASTM A48 |
Class 30 |
30,000 |
187-241 |
|
ASTM A126 |
Class B |
31,000 |
- |
|
SAE J431 |
G3000 |
30,000 |
187-241 |
|
GM274M |
G200 |
29,000 |
170-229 |
|
GM274M |
G205 |
29,725 |
179-241 |
|
ASTM A48 |
Class 35 |
35,000 |
207-255 |
|
SAE J431 |
G3500 |
35,000 |
207-255 |
|
GM274M |
G240 |
34,800 |
179-255 |
|
GM274M |
G250 |
36,250 |
187-255 |
Gray iron castings have good casting
properties, vibration damping, wear resistance, machinability and
low notch sensitivity. And gray iron castings are fitted for general
machinery, automotive parts, and valve bodies, such as engine,
clutch, valve deck, valve, fire hydrant and so on.
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