Type of
castings |
Specifications followed |
Chemical composition |
Hardness |
Tensile strength |
Uses |
| Grey Iron castings |
ISI, ASTM, DIN |
C- 3.2 to 3.8%
Si- 1.4 to 2.5%
Mn- 0.4 to 1.0%
P- 0.15% max.
S- 0.10% max
|
160 - 230 BHN |
20-30 Kgf/mm2 |
Automotive applications, machine tools, gas and
water pipe fittings, household appliances |
| Malleable Iron Castings |
ISI, ASTM |
C- 2.0 to 3.0%
Si- 0.6 to 1.3%
Mn- 0.2 to 0.6%
P- 0.15%
S-0.10% max
Other alloying elements, as required
|
Ferrite-
150 BHN max.
Pearlite-
150 - 320 BHN
|
Ferrite-
27.6 -34.5 Kgf/mm2
Pearlite-
41.4 -72.4 Kgf/mm2
|
Automotive applications, agricultural implements,
electrical hardware |
| S.G. Iron / Ductile Iron Castings |
ISI,
ASTM, DIN
|
C- 3.5 to 4.6%
Si- 2.0 to 4.0%
Mn- 0.4% max
S- 0.03% max
P- 0.08% max
|
170- 350 BHN |
40 - 80 Kgf/mm2 |
Valves and fittings, automotive applications,
agricultural implements, earth-moving machinery, steel-mill rolls
and mill equipment |
| Carbon Steel Castings |
ISI, ASTM |
C- 0.2 to 1.2%
Si- 0.25 to 1.0%
Mn- 0.50 to 1.0%
P- 0.05% max
S- 0.05% max
|
131 - 212 BHN |
43.4 - 72.4 Kgf/mm2 |
Automotive applications, electrical applications,
marine equipment, transport equipment |
| Low Alloy Steel Castings |
ISI, ASTM, DIN |
C- 0.2 - 0.5%
Si- > 0.5%
Mn- >0.5%
P- <0.05
S- <0.05%
Other alloying elements not to exceed 8%
|
221 - 607 BHN |
46.9 - 141.3 Kgf/mm2 |
Agricultural implements, earth-moving machinery,
valves and fittings |
| Manganese Steel Castings |
ISI, ASTM, DIN |
C-0.8 - 1.4%
Si - 0.8% max
Mn - 11-14%
S - 0.06% max
P- 0.10% max
Cr - 2.6 % max
Ni - 5.0 %
|
220 - 260 BHN |
About 80 Kgf/mm2 |
Crushing and grinding machinery, wheels and chains
for tanks, excavator dowels, cement plant machinery |
| Stainless Steel Castings |
ISI, ASTM, DIN |
C - 0.04-0.12%
Mn - 2.0% max
P- 0.045% max
S - 0.045%
Ni - 3-30%
Cr - 15-30%
Mo - upto 3.25%
|
190 - 200 BHN |
50 Kgf/mm2
Min
|
High temperature industrial process machinery,
pumps and valve fittings, chemical industries, food and beverage processing
industries |
| Heat Resistant Steel Castings |
ISI, ASTM, DIN |
C - 0.2-0.75%
Si - 1.0-2.50%
Mn - 0.35-2.00%
S - 0.04% max
P - 0.04% max
Ni - 4-8%
Cr - 8-30%
Mo - 0.5-1.2%
|
As required |
As required |
Industrial process equipment operating upto 1200°
C |
| Corrosion Resistant Steel Castings |
ISI, ASTM, DIN |
C - 0.15-0.50%
Si - 0.65-2.0%
Mn - 1.0-1.50%
S - 0.04%
P - upto 0.17%
Cr - 11.5-27.0%
Ni - 1.0-22.0%
Mo - 0.5-4.0%
Cu -3.0-4.0%
|
130 - 400 BHN |
45 - 130 Kgf/mm2 |
Marine, chemical and electrical industries |
|
