Q345B Q345BC Q345BD Q345BE Q390 Q420 Steel Plate Inquiry | High Strength Grade and Cut Size
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GradeQ345B,Q345C,Q345D,Q345E,Q390,Q390B,Q390CStandardASTM GB EN JIS BIS
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Thickness2.0 mm ~ 3.5 mm(0.08in~0.14in)TypeSteel Sheet
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Alloy Or NotNon-AlloyApplicationShip Plate, Boiler Plate, Container Plate, Making Pipes, Making Cold Rolled Steel Products, Making Small Tools
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CertificateAPI , CE, SNI, BIS, Saso, SONCAP, SABS, KS, JIS, Gs, ISO 9001, ISO9001:2008Delivery Timewithin 7 days
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Processing ServiceWelding, Punching, Cutting, Bending, DecoilingSkin PassYes
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Tolerance±1%ShapeFlat sheet
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SampleAvaliablePayment term30%T/T Advance + 70% Balance
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UseHigh Pressure Vessel SteelMOQ1 Ton
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Delivery termFOB CFR CIFPackageStandard Seaworth Packing
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PortTianjin Qingdao ShanghaiMaterialQ345B,Q345C,Q345D,Q345E,Q390,Q390B,Q390C
Use an exact material designation when specifying steel plate for a demanding fabrication.
Grade suffixes
The title includes Q345BC, Q345BD and Q345BE alongside Q345B and several Q390 and Q420 designations. The detail lists a narrower grade set, so clarify the intended designation instead of silently correcting suffixes or declaring grades equivalent.
Plate dimensions
The stated thickness range is 2–3.5 mm, with custom length and four width bands. Agree the actual thickness, width, length and tolerances within confirmed supply rather than treating each range as a stocked size.
- Exact grade and suffix
- Thickness and tolerance
- Selected width and length
- Material inspection records
- Application design requirements
Engineering acceptance
High pressure vessel, ship and boiler uses appear as application labels. They establish no pressure rating, toughness result or certification; agree the applicable material standard and actual design acceptance before using the supplied plate.





