Q345 Q390 Q420 High Strength Steel Plate Inquiry | B C D E Grade and Structural Requirements

• Standard

  ASTM GB EN JIS BIS
  Thickness

  2.0 mm ~ 3.5 mm(0.08in~0.14in)
• Type

  Steel Sheet
  Alloy Or Not

  Non-Alloy
• Application

  Ship Plate, Boiler Plate, Container Plate, Making Pipes, Making Cold Rolled Steel Products, Making Small Tools
  Certificate

  API , CE, SNI, BIS, Saso, SONCAP, SABS, KS, JIS, Gs, ISO 9001, ISO9001:2008
• Delivery Time

  within 7 days
  Tolerance

  ±1%
• Shape

  Flat sheet
  Sample

  Avaliable
• Payment term

  30%T/T Advance + 70% Balance
  Use

  High Pressure Vessel Steel
• MOQ

  1 Ton
  Delivery term

  FOB CFR CIF
• Package

  Standard Seaworth Packing
  Port

  Tianjin Qingdao Shanghai
• Material

  Q345B,Q345C,Q345D,Q345E,Q390,Q390B,Q390C

Specify the exact material designation before choosing plate for a structural or heavy fabrication.

Grade scope

The title names Q345, Q390 and Q420 with B, C, D and E levels. The detailed material list is narrower, so confirm the actual grade and suffix rather than assuming every family is offered at every level.

Finished dimensions

The stated thickness is 2–3.5 mm, with custom length and width bands or a custom width entry. Agree actual dimensions and tolerances, keeping broad option ranges separate from a confirmed finished plate order.

• Exact grade and suffix
• Thickness and tolerance
• Actual width and cut length
• Material test requirements
• Structural design acceptance

Engineering evidence

Ship, boiler and high pressure vessel uses are application descriptions. Request actual inspection records and applicable design approval; high strength wording alone does not establish measured yield, toughness, pressure capability or a structural load rating.