Types and uses of hot rolled steel sheets

The hot-rolled Steel Plate is made of continuous casting slab or blooming slab as raw material, which is heated in a walking furnace, descaled by high-pressure water, and then enters the rough rolling mill. Rolling, after the final rolling, it goes through laminar cooling (computer-controlled cooling rate) and coiling by a coiler to become a straight coil. The head and tail of the straight hair curler are often tongue-shaped and fish-tail-shaped, with poor thickness and width accuracy, and the edges often have defects such as wave shape, folded edge, and tower shape. The coil weight is heavier, and the inner diameter of the Steel Coil is 760mm.
Type of use
1. Structural steel
Mainly used in the production of steel structure parts, bridges, ships and vehicles.
2. Weathering steel
Add special elements (P, Cu, C, etc.), with good corrosion resistance and atmospheric corrosion resistance, used in the production of containers, special vehicles, and also used in building structures.
3. Steel for automobile structure
High-strength steel plate with good stamping performance and welding performance, used in the production of automobile FRAME, WHEEL, etc.
4. Hot-rolled special steel
Carbon steel, alloy steel and tool steel for general mechanical structures are used in the production of various mechanical parts after heat treatment.
5. Cold rolled original plate
It is used to produce various cold rolled products, including CR, GI, color-coated sheet, etc.
6. Steel plate for Steel Pipe
With good processing performance and compressive strength, it is used to produce high-pressure gas pressure vessels filled with LPG, acetylene gas and various gases with an inner volume of less than 500L.
7. Steel Plates for high pressure vessels
With good processing performance and compressive strength, it is used to produce high-pressure gas pressure vessels filled with LPG, acetylene gas and various gases with an inner volume of less than 500L.
8. Stainless steel plate
Stainless steel has good corrosion resistance and is mainly used in the food industry, surgical equipment, aerospace, petroleum, chemical and other industries.
, good ductility.
Cold-rolled sheet has high hardness and is relatively difficult to process, but it is not easy to deform and has high strength.
The strength of hot-rolled sheet is relatively low, the surface quality is poor (with oxidation and low finish), but the plasticity is good, generally medium and heavy plate, cold-rolled sheet: high strength, high hardness, high surface finish, generally thin plate, can be used as stamping Use board.
Hot-rolled Steel Sheet, the mechanical properties are far inferior to cold working, and inferior to forging, but have better toughness and ductility
Cold-rolled Steel Sheets have low toughness due to a certain degree of work hardening, but can achieve a good yield-to-strength ratio and are used to cold-form parts such as spring sheets. At the same time, since the yield point is closer to the tensile strength, there is no danger during use. Predictive, prone to accidents when the load exceeds the allowable load
Supplement, cold rolled steel plate 0.3-3.0mm, hot rolled steel plate 2.0