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Types of Iron and Steel Classification Guide
1. Types of Iron and Steel By: Karan Vohra – B.Tech IIT BHU (Department of Metallurgical Engineering)
2. Pig iron C- 3.5 to 4.5% (makes it brittle) Si - 0.5 to 1.2% Mn- 0.4 to 1.0% P – 0.15% S- 0.04% Not suitable for any commercialapplication.Further sent for steel makingor foundries. 2
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4. DUCTILE / SG/ NODULAR IRON C: 3.3 to 3.4% Si: 2.2 to 2.8% Mn: 0.1 to 0.5% Mg: 0.03 to 0.05% P: 0.005 to 0.04% S: 0.005 to 0.02% High Ductility due to nodular graphite inclusions Mg is the nodulizer Application: Trucks, Tractors, oil well pumps
14. is more suitable for forging or rollingC - 0.05 to 0.25 wt% Fe- 99-99.8% plus slag inclusions which mostly contains Si - 0.02-0.2wt% Mn- 0.01 to 0.1% P – 0.05 to 0.2%(increase corrosion resistance) S- 0.02-0.1% (decrease corrosion resistance) 8
