How to visually distinguish whether it is hot rolled or cold rolled en 10149-2 high yield strength alloy steel specifica

Customer service center has provided after-sales service for many large-scale information systems, and has accumulated rich working experience in the process of en 10149-2 high yield strength alloy steel specification service for many years. It can provid

Customer service center has provided after-sales service for many large-scale information systems, and has accumulated rich working experience in the process of EN 10149-2 high yield strength alloy steel specification service for many years. It can provide accurate, timely and high-quality support and service for users, which is well received by users.

en 10149-2 high yield strength alloy steel specification, low alloy high strength steel has good weldability. Welding is the most common method to construct engineering structure, so the steel used in engineering structure requires good welding performance. Low alloy high strength steel has low carbon content, low alloy element content and good plasticity, so it is not easy to produce quenching structure and crack in the weld area, and the addition of Ti, Nb, V can also inhibit the grain growth in the weld area. Therefore, most of the low alloy high strength steels have excellent welding performance and no heat treatment is required after welding.

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, en 10149-2 high yield strength alloy steel specification. 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.

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