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Steel for Pressure Vessels & Boilers S. No. Specification & Description Grade Chemistry (%) Mechanical Properties C Mn S P Si Nb + V + Ti N C.E. Value YS (Mpa) UTS (Mpa) El (%) Impact-min Bend Hardness 1 IS 2062 General structural steel E-250 Gr-A 0.23 max 1.50 max 0.050 max 0.050 max 0.40 max - - 0.42 max for thk<20mm-250 for thk 20-40mm-240 for thk>40mm-230 410 23 min   for thk=<25mm-3t for thk>25mm-2t - E-250 Gr-B 0.22 max 1.50 max 0.045 max 0.045 max 0.40 max - - 0.41 max for thk<20mm-250 for thk 20-40mm-240 for thk>40mm-230 410 23 min 27J at 0°C for thk=<25mm-2t for thk>25mm-3t - E-250 Gr-C 0.20 max 1.50 max 0.040 max 0.040 max 0.40 max - - 0.39 max for thk<20mm-250 for thk 20-40mm-240 for thk>40mm-230 410 23 min 27J at -20°C for thk=<25mm-2t for thk>25mm-3t - E-300 0.20 max 1.30 max 0.045 max 0.045 max 0.45 max 0.25 max - 0.40 max for thk<20mm-300 for thk 20-40mm-290 for thk>40mm-280 440 22 min 50 J at R.T. 30J at -20°C for thk=<25mm-2t for thk>25mm-3t - High Tensile Plates E-350 0.20 max 1.50 max 0.045 max 0.045 max 0.45 max 0.25 max - 0.42 max for thk<20mm-350 for thk 20-40mm-330 for thk>40mm-320 490 22 min 50 J at R.T. 25J at -20°C for thk=<25mm-2t for thk>25mm-3t - E-350 0.20 max  1.60 max 0.045 max 0.045 max 0.45 max 0.25 max - 0.44 max for thk<20mm-410 for thk 20-40mm-390 for thk>40mm-380 540 20 min 50 J at R.T. 25J at - 20°C for thk=<25mm-2t for thk>25mm-3t - 2 ASTM A36 General structural steel   0.25 max 0.80-1.20 0.05 max 0.050 max 0.40 max - - - 250 400-550 18 min _ - - 3 ASTM A283 M Low & intermediate tensile strength plate A 0.14max 0.90max 0.035max 0.035max 0.15-0.40       165min 310-415 30 min   - - B 0.17max 0.90max 0.035max 0.035max 0.15-0.40       185min 345-450 28min   - - C 0.24max 0.90max 0.035max 0.035max 0.15-0.40       205min 380-515 25min   - - D 0.27max 0.90max 0.035max 0.035max 0.15-0.40 _ _ _ 230min 415-550 23min   - - 4 BSEN 10025 Structural steel S235 0.17max 1.40max 0.035max 0.035max     90ppm max 0.35max 235min 340-470 23min 27J at -20°C - - S275 0.18max 1.50max 0.035max 0.035max     90ppm max 0.40max 275min 410-5602 23min 27J at -20°C - - S355 0.20max 1.60max 0.035max 0.035max 0.55max   90ppm max 0.45max 355min 490-630 23min 27J at -20°C - - 5 DIN 17100 Micro alloyed structural steel St 37.2 0.17max 1.60max 0.040max 0.040max 0.55max   90ppm max   235min 360-510 26min 27J at +20°C - - St 44.2 0.20max 1.60max 0.040max 0.040max 0.55max   90ppm max   275min 430-580 22min 27J at -20°C - - St 52.3 0.20max 1.60max 0.040max 0.040max 0.55max   90ppm max   355min 510-680 22min 27J at -20°C - -

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