Cold Rolled Steel and its Uses in everyday life

Cold Rolled Steel is a type of steel that has a low amount of carbon in it. It is produced by "cold rolling" and processed at temperatures close to room temperature. Cold-rolled steel provides us with quite higher strength and machinability. Below are some areas where cold-rolled steel is often used in everyday life:

● Cold Rolled Steel is perfect for projects that require a high level of precision. 

● For moderate draw applications, the metal is easily formable.

● As a result, it's perfect for usage in a variety of household appliances and metal furnishings. 

● This metal is widely used in filing cabinets and school lockers.

● Cold rolled steel is a common building material for steel sheds, industrial complexes, and garages.

Advantages of using Cold-rolled steel:

➢ Greater strength: Cold-rolled steel has a strength that is up to 20% higher than hot-rolled steel, making it more suitable for use in high-stress applications.

➢ Better surface finishes: Cold-rolled steel parts and products typically have a smooth, lustrous surface that is free of rust and scale.

➢ Higher precision: Cold-rolled steel does not shrink following the forming process, unlike hot rolled steel, which does. This quality allows the generation of extremely precise components that require minimal further processing.

➢ Tighter Tolerances: When compared to hot rolling, cold rolling provides for tighter tolerances. Cold-rolled steel is often thinner than hot-rolled steel without compromising on strength. As a result, cold rolling allows for tighter tolerances than other steelmaking methods.

➢ Multiple Options: Cold-rolled steel can be made in a variety of ways, including full-hard, half-hard, quarter-hard, and skin-rolled. Full-hard cold rolling is frequently preferred over the other options because it provides the tightest tolerances. Other cold rolling procedures can reduce steel thickness, although they are less successful than full-hard cold rolling.

Cold-rolled steel can be divided into various types of steel grades. They are:

1. Structural Grades - 30, 33, 36, 40, 36T2, 45-80, 45T2.

2. HSLA Grades - 45C1, 45C2, 50C1, 50C2 & 55C2, 55C1, 60C1 & 65C1, 60C2 & 65C2, 70C1, 70C2.

3. Common Grades - CSA, CSB, CSC, BH, FSA, FSB, DDS, EDDS.

Disadvantages of using Cold-rolled steel: 

❖ Although no hot plastic compression occurs during the forming process, residual stress remains in the section, affecting the steel's overall and local buckling characteristics.

❖ The free torsional stiffness of a cold-rolled steel profile is low because it is often an open section. When bent, it is easily twisted, and when pressed, it is prone to bending and torsion buckling, with low torsion resistance.

❖ The cold-rolled steel has a thin wall thickness and no thickening at the corners where the plates are linked, making it vulnerable to localized concentrated loads.

This is a summary of cold rolled steel along with its advantages and disadvantages. JSW ColdRolled Steel is one of the most renowned companies in India if you wish to purchase steel.