EH420 Offshore Steel Plate, NVE420 Det Norske Veritas Certification, ABEQ43 American Bureau of Shipp

EH420 Offshore Steel Plate, NVE420 Det Norske Veritas Certification, ABEQ43 American Bureau of Shipp

EH420 Offshore Steel Plate, NVE420 Det Norske Veritas Certification, ABEQ43 American Bureau of Shipping Certification

EH420, NVE420, ABEQ43 is a classification society certification of offshore engineering steel plate, classification society certification of 9 major classification societies, China CCS USA ABS Germany GL France BV Norway DNV Japan NK UK LR Italy RINA South Korea KR (Norway DNV and Germany merged into: VL, nine major classification societies certification.

EH420, NVE420, ABEQ43 fixed rolling: Wugang Xiangyang

EH420, NVE420, ABEQ43: TMCP, quenching + tempering, TMCP+tempering heat treatment status

GB712-2011 Structural Steel for Ships and Offshore Engineering Structural Steel Code The trademarks are: A, B, D, E, AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, AH420, DH420, EH420, FH420, AH460, DH460, EH460, AH460, AH500, DH500, EH500, FH500，AH550，DH550，EH550，FH550，AH620，DH620，EH620，FH620，AH690，DH690，EH690，FH690

Analysis of the chemical composition of steel plates

Grade: C, Si, Mn, P, S, N

EH420 ≤0.21 ≤0.55 ≤1.70 ≤0.030 ≤0.030 ≤0.020

Effect of different line energy input on the microstructure and low-temperature impact performance of EH420 steel welding heat affected zone. EH420 test steel plate was prepared by vacuum induction furnace and TMCP rolling process, welding thermal simulation test was carried out by Gleeble-3800 dynamic thermal simulation testing machine, mechanical properties of base metal and post-weld simulated samples were tested by tensile testing machine and impact testing machine, and metallographic observation of samples was carried out by optical microscope. The results show that the steel plate prepared by Ti-Mg composite deoxidation oxide metallurgy technology and TMCP rolling process has good large-line energy welding performance. Ti-Mg-0 particles promote the formation of a large number of needle-like ferrite in the welding heat-affected zone, thereby improving its low-temperature impact performance. With the increase of line energy, the size of the original austenite increases, the grain boundary ferrite gradually increases, the Weissen content increases first and then decreases, the Weisserite grain size increases, and the low-temperature impact absorption work of HAZ decreases.

EH420, NVE420, ABEQ43 steel plate has the characteristics of high strength, good plasticity and toughness, excellent processing performance, welding performance and corrosion resistance, and is an important material for hull structural parts and oil and gas drilling platforms.