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Steel Plate Performance
Jun 05, 2017

Alloy

With the development of science and technology and industry, higher requirements for materials, such as higher strength, high temperature resistance, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties of the requirements, carbon steel can not fully meet the requirements.

Carbon steel in the performance of the main aspects of the following deficiencies:

(1) Low hardenability. In general, the maximum quench diameter of carbon steel is only 10mm 20mm.

(2) The strength and yield are relatively low. such as ordinary carbon steel Q235 steel σ S is 235MPa, and low alloy structural steel 16Mn σ S is above 360MPa. 40 steel σ S/σ B is only 0.43, far below alloy steel.

(3) Poor tempering stability. Due to poor tempering stability, in order to ensure the high strength of carbon steel in the process of tempering, the toughness of the steel is low, so that the high tempering temperature is low, so the synthetic mechanical properties of carbon steel are not high.

(4) Can not meet the special performance requirements. Carbon steel in anti-oxidation, corrosion resistance, heat resistance, low temperature, wear resistance and special electromagnetic properties are often poor, can not meet the needs of special performance.