Main causes of subsurface bubble formation in marine grade AH40 steel plate

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Cold-forming high-strength steel for automobile beams and other structural parts: B510L, B320L, B420L, B510L, B510DL, B550L, B600L, B650L, B700L, B750L, S355MC, S420MC, S460MC, S500MC, S550MC,DD11, DD12, SPHC, SPHD, SPHE, QStE340TM, QStE380TM, QStE420TM, QStE460TM, QStE500TM automotive structural steel coil, QStE600TM, QStE650TM, QStE700TM (340XLF, ZSTE420, 410XLF) BR1500HS.

The allowable working temperature of boiler steel plate is generally below 475 ℃, which can't meet the needs of high temperature working condition. Chromium molybdenum steel is one of the common steels for marine grade AH40 steel plate pressure vessels, which is widely used in various hydrogenation units and reforming units in oil refining and chemical industry. Therefore, on the basis of common marine grade AH40 steel plate carbon steel, alloy elements such as Cr Mo V are added, which has excellent hydrogen corrosion resistance and good high temperature strength, It is the material of high temperature and high pressure vessel shell and head.

A514 gr.B steel coil chemical composition (melting analysis)%
C: 0.12-0.21, Si: 0.20-0.35, Mn: 0.70-1.00, P max.: 0.035, S max.: 0.035, B max.: 0.005, Cr: 0.40-0.65, Mo: 0.15-0.25, V: 0.03-0.08, Ti: 0.01-0.03
The mechanical properties in thickness (mm)T≤65
Yield strength (≥Mpa): 690
Tensile strength (Mpa):760-895
Elongation in ≥,%: 18

We have transportation department and shipping department to coordinate logistics and delivery. Seamless connection between inland transportation and sea transportation ensures smooth delivery, saves transportation time and delivers goods in the first time. During the sea transportation, we will update the freight progress for customers on a regular basis, so as to facilitate the tracking of customers and make preparations for receiving goods leisurely and timely.

our company is a professional ASTM A573 Grade 70/A573 Gr.70 carbon manganese silicon steel plates steel exporter and a steel Stockist in china. We keep more than marine grade AH40 steel plate 1000 tons ASTM A573 Grade 70/A573 Gr.70 carbon manganese silicon steel plates steel in stock every month.