How to distinguish cold-formed steel from hot-rolled steel?

1. Cold-formed steel: It is a kind of steel with various cross-sectional shapes and sizes, which is made of hot-rolled or cold-rolled strip steel.

2. Hot-rolled section steel: steel with various geometric cross-sectional shapes rolled from heated billets.

Second, the process is different.

1. Cold-formed steel: Cold-formed steel is the main material for manufacturing light-weight steel structures, which is formed by cold-forming steel plates or steel strips. Its wall thickness can not only be made very thin, but also greatly simplifies the production process and improves the production efficiency. It can produce all kinds of profiles and cold-formed steel with different materials, with uniform wall thickness but complex cross-section shape, which is difficult to produce by general hot rolling method.

2. Hot-rolled section steel: Most of the hot-rolled sections of low alloy steel are hot-rolled rebar bars and sections rolled by 16Mn, and sections with special sections are rarely used. Compared with ordinary I-beam, H-beam has the advantages of large section modulus, light weight, less steel consumption and easy combination connection with other components.

Third, the use is different.

1. Cold-formed steel: Its uses can be roughly divided into 10 categories, such as highway guardrails, steel structures, automobiles, containers, steel formwork and scaffolding, railway vehicles, ships and bridges, steel sheet piles, transmission towers and others.

2. Hot rolled section steel: In China, according to the section size of section steel, hot rolled section steel has become one of the most widely used materials in capital construction, such as rebar, axle and shared steel. All kinds of hot rolled steel are widely used in machinery, chemical industry, shipbuilding, mining, petroleum and railway.

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