GRAY IRON (ASTM A-48, A-126, A278, A319)
| Class/Grade
20 30 40 50 60 |
Min.Tensile Strength (PSI) 20,000 30,000 40,000 50,000 60,000 |
Brinell Hardness 170-229 187-241 217-269 |
DUCTILE IRON (ASTM A-395, A-476, A536)
| Class/Grade
60-40-18 65-45-12 80-55-06 100-70-03 120-90-02 |
Min.Tensile Strength (PSI) 60,000 65,000 80,000 100,000 120,000 |
Min Yield (PSI) 40,000 45,000 55,000 70,000 90,000 |
Elongation (%) 18 12 6 3 2 |
Brinell Hardness 170 max. 156-217 187-255 241-302 As Specified |
NI-RESIST IRON(ASTM A-436)
| Type | Min.Tensile Strength (PSI) | Brinell Hardness |
| 1 | 25,000 | 131-183 |
| 1b | 30,000 | 149-212 |
| 2 | 25,000 | 118-174 |
| 2b | 30,000 | 171-258 |
DUCTILE NI-RESIST(ASTM A-439, A571)
| Class/Grade | Min.Tensile Strength (PSI) | Min Yield (PSI) | Elongation (%) | Brinell Hardness |
| D-2 | 58,000 | 30,000 | 8 | 139-202 |
| D-2b | 58,000 | 30,000 | 7 | 148-211 |
| D-2M (class 1) | 65,000 | 30,000 | 30 | 121-171 |
| D-2 (class2) | 60,000 | 25,000 | 25 | 111-171 |