Steel is an indispensable material in life, especially in the construction field. There are many different types of construction steel on the Vietnamese market. Today, we join Dong A Steel Steel to learn what Steel is and the characteristics of common steels.

- According to Wikipedia, Steel (Steel) is an alloy whose main part is Iron (Fe), carbon (0.02-2.14% by weight) and some other chemical elements. Based on the% composition of the elements, Steel will have different hardness, elasticity, ductility, and tensile strength.

- Steel is a metal material, so it has iridescence, strong electrical conductivity, strong thermal conductivity ... At a temperature of 500 degrees C - 600 degrees C, Steel becomes more flexible, the intensity decreases. At -10 degrees C the plasticity decreases. At -45 degrees Celsius, steel is brittle, easy to crack. The density of steel is from 7.8 to 7.85 g / cm3

Popular types of construction steel
On the Vietnamese market, construction steel is mainly classified according to Structure Steel. The main types of steel structures are industrial buildings, public buildings' large aperture frames and ceilings, flyovers, towers, pillars, suspended ceilings, windows and doors molds, ... We have the following types:

1. Steel Sheet
Steel Sheet (Steel Sheet) is Steel that is processed in a thin and flat shape with a large size. Often used to build factories for large projects. There are 2 types of Hot Rolled Steel and Nguoi Roll Steel.

2. Shaped Steel
Shape steel is shaped steel H, L, V, U, I, T, C, Z, steel pipes, angle steel, ... by machining methods such as: heat processing (Annealed, Normalized, I, Ram), hot processing (Hot rolling, forging), cold mechanical processing (Cold rolling, pulling, forging, clawing, combination ..)

3. Steel Bar
Steel Bar or Rebar is Steel machined in a 12m long bar cylinder, with high toughness, bending resistance and elongation. Steel Rod is often used for industrial or civil constructions

4. Steel Coils
- Steel Coil or Steel Wire is a rolled steel wire, with a smooth or patterned (ribbed) surface with common diameters: Ø6mm, Ø8mm, Ø10mm, Ø12mm, Ø14mm. Usually supplied to the market in rolls with an average weight of 200-459kg / roll