The large diameter cold drawn seamless steel pipe is a steel pipe with an outer diameter of more than 1000mm. The large diameter seamless steel pipe is made of steel ingot or solid billet through perforation and then hot rolling, cold rolling or cold drawing. If they are long, they need to remove the redundant parts, that is, cut them out. Their length AH36 steel is suitable for the length required by the construction of steel pipes.
Quenching and tempering (QT) is a double heat treatment process of quenching and high temperature tempering. In general, medium carbon steel and medium ah36 steel carbon alloy steel often need quenching and tempering treatment. Quenching and tempering can make iron and steel parts obtain a good combination of strength and toughness, with high strength, excellent toughness, plasticity, cutting performance, etc. Some ah36 steel alloy steel or low alloy steel must be quenched and tempered to obtain good comprehensive properties. These steels can also be called quenched and tempered steels.
What is the difference between CCSB and AH36? The general strength structural steel of China Classification Society standard bai is divided into four quality grades: A, B, D, E (ie CCSA, CCSB, CCSC, CCSD); AH36, H represents high strength 36 represents 360MPa A represents steel The grades can be divided into 4 grades (A, B, D, E), so the meaning of this code is high-strength A-grade marine steel with a allowable pressure of 360MPa.
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