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  • HII PLATE
  • HII STEEL

HII

  • 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
Pressure vessel steel plate HII owned the minimum yield strength at 265Mpa for thickness equal and below 16mm,255Mpa for thickness within 16-40mm,tensile strength within 410-530Mpa for steel plate thickness equal and below 100mm,400-530 Mpa for steel plate thickness above 100mm.The equivalent steel grade for boiler steel plate HII is P265GH in EN 10028-2,and SB410 in Japanese steel standard.Now Xinsteel can offer the maximum thickness for boiler steel plate HII till 350mm with Normalized and ultrasonic examination.
■ 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 HII Boiler steel:

Thickness (mm)
HII ≤ 16 > 16 ≤ 40 > 40 ≤ 60 > 60 ≤ 100 > 100
Yield strength (≥Mpa) 265 255 245 215 200
  ≤ 60 > 60 ≤ 100 > 100
Tensile strength (Mpa) 410-530 410-530 400-530

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

Main chemical elements composition of HII
C Si Mn P S Al(total) Cr
0.20 0.35 0.50-1.30 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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