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  • HI PLATE
  • HI STEEL

HI

  • Steel Standard: DIN 17155
  • Rolling Type: Pressure vessel steel plate,Boiler steel plate
  • Thickness: 6mm-350mm
  • Width: 1500mm-4200mm
  • Length: 3000mm-18000mm
  • Heat Treatment: Normalised
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■ Overview
HI boiler steel plate under steel standard DIN17155 is mainly used for welded boiler and pressure vessel buildings.Now more and more end users adopt boiler steel plate P235GH under EN 10028-2 replacement of HI boiler steel plates.P235GH and HI pressure vessel steel plates have the same mechanical property values as minimum yield strength at 235 Mpa and tensile strength within 360-480 Mpa.When rolling boiler steel plate HI,normalized heat treatment and ultrasonic examination is necessary. 
■ Full Data
Technical Requirements & Additional Services:
♦ Low temperature impacting test
♦ Rolling under standard NACE MR-0175 (HIC+SSCC)
♦ Ultrasonic test under EN 10160,ASTM A435,A577,A578
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Shot blasting and Painting,Cutting and welding as per end user’s demands 
■ Techicals
Mechnical property for HI Boiler steel:

Thickness (mm)
HI ≤ 16 > 16 ≤ 40 > 40 ≤ 60 > 60 ≤ 100 > 100
Yield strength (≥Mpa) 235 225 215 200 185
  ≤ 60 > 60 ≤ 100 > 100
Tensile strength (Mpa) 360-480 360-480 350-480

Chemical composition for HI Boiler steel (Heat Analysis Max%)

Main chemical elements composition of HI
C Si Mn P S Al(total) Cr
0.16 0.35 0.40-1.20 0.035 0.030 ≥0.02 0.25
Cu Mo Nb Ni Ti V
0.30 0.10 0.01 0.30 0.03 0.03
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