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  • Q420B PLATE
  • Q420B STEEL

Q420B

  • Steel Standard: GB/T1591
  • Rolling Type: High strength low alloy structural steels
  • Thickness: 6mm-400mm
  • Width: 1500mm-4200mm
  • Length: 3000mm-18000mm
  • Heat Treatment: As rolled/Control-rolled/Normalised/N+T/QT
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■ Overview
Steel grade Q420B is under steel specification GB/T1591 which is for high strength low alloy structural steels.When customers need special sizes for steel Q420B useage,Xinsteel has the ability to cut and weld in our processing plant for small parts,round plate,seal head and other frames.
■ Full Data
Technical Requirements & Additional Services:
♦ Low temperature impacting test
♦ Cutting and welding as per end user’s demands
♦ More striction on some chemical elements contains
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578 
■ Techicals

Mechnical property for Q420B low alloy structural steel:

Thickness (mm)
Q420B ≤ 16 > 16 ≤ 35 > 35 ≤ 50 >50
Yield strength (≥Mpa) 420 400 380 360
Tensile strength (Mpa) 520-680

Chemical composition for Q420B low alloy structural steel (Heat Analysis Max%)

Main chemical elements composition of Q420B
C Si Mn P S V Nb Ti Cr Ni
0.20 0.55 1.00-1.70 0.040 0.040 0.02-0.20 0.015-0.060 0.02-0.20 0.40 0.70

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