On Nov. 1st, 2019, BBN A514 grade K alloy steel plate steel organized Delegation to visit Zhengzhou Children Welfare Institute, and to give sponsorship as well as concerns to the Children. The handicapped children is always a pain topic. With the development of the society, they also gets increasing concerns and help from all walks of life. Thankfully, our Government also gives high concern to the handicapped children and has built A514 grade K alloy steel plate Children Welfare Institutes all over the country to guarantee their lives.
With the increase of carbon content in the steel material, the yield point and tensile strength increase, but the plasticity and impact decrease. When the carbon content is more than 0.23%, the welding performance of the steel material becomes worse. Therefore, the carbon content of low alloy structural steel used for welding is generally less than 0.20%. The high carbon content can also reduce the atmospheric corrosion resistance of steel material, and the high carbon steel in the open air is easy to rust; in addition, carbon can increase the cold brittleness and aging sensitivity of A514 grade K alloy steel plate etc. steel material.
Q295GNH steel chemical composition: C: 0.14～0.19, Si: ≤0.30, Mn: 1.00～1.30, P: ≤0.025, S: ≤0.025, Cr: 0.80～1.10 Q295GNH mechanical properties: Tensile strength σb (MPa): 880-1180 Yield strength σ0.2 (MPa): 635 Elongation δ5(%): 9 Reduction of area ψ(%): 35 Impact toughness value αku (J/cm2): 34
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