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EN 10028:3 P275NH Boiler Plate Steel
EN 10028:3 P275NH boiler plate steel is for pressure purposes (P) with minimum yield strength of 275 MPa (275) which has specified elevated temperature properties (NH). Learn more about our steel grades here.
As well as P275NH we are stockists of other EN 10028:3 plates manufactured and certified to:
EN 10028:3 P355NL1, EN 10028:3 P355NL2, EN 10028:3 P355NH.
We also carry stocks of plates certified to EN 10028:2 P265GH.

Applications

  • Boilers
  • Calorifiers
  • Dished ends
  • Flanges
  • Heat exchangers
  • Pipelines
  • Pressure vessels
  • Storage tanks
  • Valves
  • Flanges and fittings
  • Condensers
pressure vessel steel

Properties

Chemical Requirements
(cast analysis, % by mass, maximum permitted unless indicated otherwise)

C Si Mn P S A1 total N Cr Cu Mo Nb Ni Ti V Nb+Ti+V
0.16 0.40 0.80 – 1.50 0.025 0.015 0.020 min 0.012 0.30 0.30 0.08 0.05 0.50 0.03 0.05 0.05

Tensile Requirements

Product thickness Yield strength MPA Tensile strength MPA Elongation A%
up to 16mm 275 min 390 to 510 24 min
16mm to 40mm 265 min 390 to 510 24 min
over 40mm to 60mm 255 min 390 to 510 24 min
over 60mm to 100mm 235 min 370 to 490 23 min
over 100mm to 150mm 225 min 360 to 480 23 min
over 150mm to 250mm 215 min 350 to 470 23 min

VALUES:
Impact energy values for the normalised condition.

-20°C 0°C +20°C
Transverse 30 J min 40 J min 50 J min
Lonitudinal 45 J min 65 J min 75 J min

STRENGTH:
Min. values for proof strength Rp0,2 (MPa) at elevated temperatures.

Thickness 50°C 100°C 150°C 200°C 250°C 300°C 350°C 400°C
up to 16mm 266 250 232 213 195 179 166 156
16mm to 40mm 256 241 223 205 188 173 160 150
over 40mm to 60mm 247 232 215 197 181 166 154 145
over 60mm to 100mm 227 214 198 182 167 153 142 133
over 100mm to 150mm 218 205 190 174 160 147 136 128
over 150mm to 250mm 208 196 181 167 153 140 130 122

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