BV EH32 steel is commonly known as the French Classification Society (BV) ship plate code, and the hull structure is made of steel. Steel for hull structure is divided into two types: general strength and high strength steel. The quality of general strength steel is divided into A, B, C, and D grades; high strength steel is divided into two strength grades and three quality grades: AH32, DH32, EH32,
AH36, DH36, EH36.
BV EH32 steel chemical composition
C: ≤0.18, Si: ≤0.50, Mn: 0.90~1.60, P: ≤0.035, S: ≤0.035, Als: ≥0.015, Nb+V+Ti: ≤0.12, Cu: ≤0.35, Ni: ≤0.40, Mo: ≤0.08
BV EH32 steel plates and sheets dimension
Thickness: 3mm -300mm
Width: 1000mm-4000mm
Length: 1000mm-20000mm
Heat Treatment: as rolled, normalized, normalized rolled
BV Grade EH32 steel is a high-strength ship plate. In order to obtain good low temperature toughness and weldability, it is necessary to refine and uniform the grains in the entire cross-section and thickness direction of BV EH32 steel plate. Measures for grain refinement and uniformity: on the one hand, in the process of controlling rolling, the reduction amount and rolling speed of each pass should be rationally designed. When rolling BV Grade EH32 in the austenite recrystallization zone, try to increase the single pass reduction: when rolling in the austenite non-recrystallization zone, a large cumulative deformation rate (≥60%) should be ensured, BV EH32 rolling After completion, rapid cooling is performed to control the grain size in the rolled state. On the other hand, the proper normalizing process system can further refine the grains and make the grain size uniform.
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