Mild steel (iron containing a small percentage of carbon, strong and tough but not readily tempered), also known as plain-carbon steel and low-carbon steel, is now the most common form of steel because its price is relatively low while it provides material properties that are acceptable for many applications. Mild steel contains approximately 0.05–0.25% carbon making it malleable and ductile. Mild steel has a relatively low tensile strength, but it is cheap and easy to form; surface hardness can be increased through carburizing. In applications where large cross-sections are used to minimize deflection, failure by yield is not a risk so low-carbon steels are the best choice, for example as structural steel. The density of mild steel is approximately 7.85 g/cm3 (7850 kg/m3 or 0.284 lb/in3)and the Young's modulus is 200 GPa (29,000 ksi). Low-carbon steels display yield-point runout where the material has two yield points. The first yield point (or upper yield point) is higher than the second and the yield drops dramatically after the upper yield point. If a low-carbon steel is only stressed to some point between the upper and lower yield point then the surface develops Lüder bands.Low-carbon steels contain less carbon than other steels and are easier to cold-form, making them easier to handle.
High tensile strength
Cast iron has higher strength at reduced costs. They also have higher strength and ductility and are stiffer than pure iron. The strength of cast iron is what makes it a workable material for various industries. It has a low melting point and greater fluidity.
Easy to fabricate
Cast iron is used in an array of industries because of the ease of its castability. The cast iron can be molded into various shapes and sizes based on the industrial needs. The cost of production and the minimal usage of tools make it a viable manufacturing material.
Long life of 100 years or more
Cast iron can be easily machined into final products. The properties of a metal like hardness, tensile strength and microstructure alter its machinability. Hence, it can be used in a number of industries for manufacturing numerous products.
Low cost and durability
Cast iron saves tons of money in the long term. It requires little or no maintenance for a long time coming. Using cast iron in industries can eliminate unnecessary replacement. Further, cast iron products can be integrated into existing systems, thereby minimizing the cost of replacement. Cast iron is also more malleable than other metals.