Cleveland cliffs announced on March 13 that it had completed the acquisition of AK steel SA283 Gr.C+ar steel, foreign media reported In the transaction of holding), shareholders of Cleveland cliffs and AK steel respectively voted on the US billion acquisition agreement at their respective shareholders' meeting to complete the resolutions required for the announcement of acquisition of AK steel steel SA283 Gr.C+ar at the beginning of the year. The acquisition is Cleveland cliffs' first foray into steel manufacturing.
The acicular ferrite pipeline steel can inhibit the formation of polygonal ferrite, promote the acicular ferrite transformation, and improve the precipitation strengthening effect of carbon and niobium nitride by adding molybdenum to reduce the transformation temperature of polygonal ferrite, so as to improve the strength of steel and reduce the ductile brittle transition temperature. The steel SA283 Gr.C+ar, tempered sorbite pipeline steel adopts the heat treatment process of quenching and tempering. The tempered sorbite structure is formed to meet the comprehensive requirements of thick wall, high strength and sufficient toughness.
Cold-forming automobile structural steel S650MC chemical composition (melting analysis)%C: ≤0.12, Si: ≤0.60, Mn: ≤2.00, P: ≤0.025, S: ≤0.015, Al: ≥0.015, Nb: ≤0.09, V: ≤0.20, Ti: ≤0.25, Mo: ≤0.50, B: ≤0.005The mechanical properties Yield strength: ≥650 MPaTensile strength: 700-880 MPaElongation: ≥10%
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