The quality of A588 Grade B corrosion resistant steel shall not only meet the requirements of the standard, but also be higher or stricter than the product characteristics specified in the standard, including chemical composition, structure, physical properties, chemical properties and other requirements of A588 Grade B corrosion resistant steel buyer, such as packaging, delivery time, etc.. On the basis of the quality of A588 Grade B corrosion resistant steel in line with the corresponding standards, some buyers will put forward specific requirements according to their own use requirements, which is called technical agreement. That is, some specific factors should be met according to the buyer's requirements.
The carbon content (mass fraction, %) of No. 55 steel is ≥0.4. A588 Grade B corrosion resistant steel, 55# material has excellent wear resistance, but the ductility is reduced, and it is easy to deform and crack during quenching. Therefore, quenching is extremely important, and it must be quenched after tempering to avoid temper brittleness. No. 55 steel is difficult to cut, and spheroidizing treatment is required to improve the cutting performance. In principle, it is tempered to a hardness of 19-22HRC to facilitate machining.
Aspire to technological innovation and pursue first-class quality steel A588 Grade B corrosion resistant steel products.Take independent innovation as an important support for the sustainable development of iron and steel industry, strengthen the main position of technological innovation, accelerate the original innovation, integrated innovation, introduction, digestion, absorption and re innovation, improve the technological innovation system, and cultivate the core technology and brand products of independent intellectual property rights.
Fake and inferior steel plates are easy to scratch because of the simple equipment of the manufacturers of fake and inferior materials, which are easy to produce burrs and scratch the surface of the steel plate. Deep scratches reduce the strength of the A588 Grade B corrosion resistant steel, steel plate. The surface of the fake and inferior material is prone to cracks, because its billet is adobe, which has many pores. The adobe is subjected to thermal stress during the cooling process, and cracks are generated, and there will be cracks after rolling.