The cold working performance of A514 grade B quenched and tempered steel and so on steel structure engineering steel is good, which can ensure that the steel will not crack or brittle fracture during high-temperature processing, and will not have a great impact on strength, plasticity and toughness due to processing. The durability of A514 grade B quenched and tempered steel and so on steel structure engineering steel is good. Durability refers to the service life of steel structure. The main factor affecting the service life of steel is the poor corrosion resistance of steel, followed by the deterioration of mechanical properties of steel under long-term load, repeated load and dynamic load.
A514 grade B quenched and tempered steel and Q690CF plate are hot rolled steel plates. The chemical composition of Q690CF steel is as follows: C: 0.05-0.08%, Si: 0.22-0.30%, Mn: 1.6-2.0%, Al: 0.2-0.35%, Cr: 0.10-0.35%, Mo: 0.20-0.35%, Ni: 0.1-0.4%, Cu: 0.15-0.3%, Nb: 0.025-0.045%, V: 0.01-0.03%, Ti: 0.005-0.03%, P ≤ 0.010%, S ≤ 0.008% by mass percentage, the remaining is Fe and unavoidable impurities.
The company has superior geographical location and convenient transportation. After more than 20 years of market trials and tribulations, from small to large, from weak to strong, in order to meet the needs of customer extension development, the company expanded the deep A514 grade B quenched and tempered steel processing services of cutting steel pieces. Now we have built a business system integrating steel plate, steel plate cutting and A514 grade B quenched and tempered steel steel deep processing. The company provides one-stop solution for customers with lower price, higher quality and faster response speed.
Vanadium mainly exists in the form of carbide in A514 grade B quenched and tempered steel and so on steel. Its main function is to refine the structure and grain size of steel and reduce the strength and toughness of steel. When the solid solution is dissolved at high temperature, the hardenability is increased; conversely, if it is in the form of carbide, the hardenability is reduced. Vanadium increases the tempering stability of quenched steel and produces secondary hardening effect. The vanadium content in steel, except high speed tool steel, is generally less than 0.5%.
