Reasons and countermeasures for failure of tensile fracture of SA283 grade C carbon steel plate sheet

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SA283 grade C carbon steel plate sheet, Wear-resistant plate is one of the most widely used wear-resistant steel materials. Because of its outstanding wear-resistant characteristics, wear-resistant plate has its own unique use. First, mining machinery and equipment. During ore processing and transportation, the ore and equipment often produce violent friction, the general steel plate can not bear friction for a long time, it is easy to be damaged, and wear-resistant plate is very effective to solve this problem. Second, the ground laying. Some construction site roads are paved with wear-resistant plates, for long-term use of truck transportation.

Normalizing is a special case of annealing, the effect is similar to annealing, but the microstructure obtained by normalizing is finer. For low or medium carbon steel, normalizing can improve hardness and machinability. For SA283 grade C carbon steel plate sheet medium carbon steel and low alloy steel, normalizing can refine grain and uniform structure and reduce hardness. For high carbon steel and high alloy steel, normalizing can eliminate the network carbide produced by forging and improve the homogeneity of the preparation heat treatment structure.

20Mn2 steel has medium strength, and the properties of 20Mn2 steel and 20Cr steel are similar. The impact toughness and weldability of 20Mn2 steel at low temperature are better than those of 20Cr steel. The plasticity and machinability of 20Mn2 steel are high during cold deformation. The hardenability of 20Mn2 steel is higher than that of corresponding carbon steel, SA283 grade C carbon steel plate sheet. Chemical composition of 20Mn2 steel: C: 0.17-0.24, Si: 0.17-0.37, Mn: 1.40-1.80. Mechanical properties of 20Mn2 steel: tensile strength ≥ 785 MPa, yield strength ≥ 590 MPa, elongation after fracture ≥ 10%, section expansion rate ≥ 40%, impact absorbed energy ≥ 47J.

BBN Steel Company adheres to the marketing concept of "first-class technology, first-class steel quality, and first-class logistics services". It is our goal to build high-quality carbon steel SA283 grade C carbon steel plate sheet, alloy steel plates and high-strength structural steel plate international-class boutique bases. Our logistic team will make customs clearance documents, track products production process, and update shipping information for customers. Creating value for customers is our pursuit.

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