What are the precautions in the cutting of A573 grade 70 carbon steel plate sheet

The production method of seamless steel pipe can be roughly divided into cross rolling method (menesmann method) and extrusion method. The cross rolling method (menesmann method) is to pierce the tube blank with the cross roll first, and then extend it with the rolling mill. This method is fast in production, but requires high machinability of tube blank. It is mainly suitable for producing carbon steel and low alloy steel tube, A573 grade 70 carbon steel plate sheet tube.

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A573 grade 70 carbon steel plate sheet, Q460C steel plate is a kind of low-alloy high-strength steel. In the grade Q460C, Q represents the yield strength of steel, and Q is the capital of the first letter in Chinese Pinyin "Qu"; 460 represents 460 MPa, and mega is the 6th power of 10. Pa is the pressure unit Pascal; C—quality grade is C grade (grades are divided into C, D, E).

The toughness of steel such as A573 grade 70 carbon steel plate sheet is the ability of steel to absorb energy in the process of plastic deformation and fracture, and also the ability of steel to resist impact load. It is related to and different from the plasticity of steel. It is the comprehensive performance of strength and plasticity. The strength plasticity index of steel is obtained by static tensile test. When these indexes are used to bear the dynamic load structure, there are obvious limitations.