ZQS700L cold forming automobile structure steel 7cm steel specification

Cleveland cliffs, the largest ZQS700L cold forming automobile structure steel iron ore company in North America, announced on April 13 that its Northshore mine in Minnesota and Tilden mine in Marquette County, Michigan, will suspend production based on th

Cleveland cliffs, the largest ZQS700L cold forming automobile structure steel iron ore company in North America, announced on April 13 that its Northshore mine in Minnesota and Tilden mine in Marquette County, Michigan, will suspend production based on the current market environment. The company said it would reduce inventory levels in both regions, while continuing to ZQS700L cold forming automobile structure steel ship iron ore to its customers to meet commercial agreements.

ZQS700L cold forming automobile structure steel, Special thick steel plate cutting needs to be preheated in advance. Some steel plates are prone to cracks after entering the cutting process, sometimes that is because the temperature is too low, and it is necessary to perform pre-heat treatment in advance for such cases. The staff can preheat the steel plates first, so that the temperature of the steel plates will gradually increase, and then the flame gun can be used to cut. The probability of cracks in the cut material is very low, and the quality of the steel plate is also guaranteed.

Q690E high strength steel chemical composition: C: 0.08-0.15, Si: 0.17-0.37, Mn: 0.40-0.70, S: ≤0.035, P: ≤0.035, Cr: 0.30～0.60, Cu: ≤0.030, Ni: ≤0.030, V: 0.15-0.30, Mo: 0.25-0.35
Q690E mechanical properties:
Tensile strength σb (MPa): ≥440
Yield strength σs (MPa): ≥225
Elongation δ5 (%): ≥22
Reduction of area ψ (%): ≥50
Impact energy Akv (J): ≥78

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