BS 1501 224 490B LT50

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BS 1501 224 490B LT50

  • BS 1501 was officially withdrawn on 15th February 1993
  • We see daily sales and enquiries for grades in that form.
  • Pressure vessel plate manufactured and certified to BS 1501 224 490B LT50 forms a significant part of Brown McFarlane’s stock inventory.

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Requirements

Chemical Requirements

C Si Mn P S
0.22 max 0.10 - 0.40 0.90 - 1.60 0.030 max 0.030 max
A1 (metallic) Cr* Cu* Mo* Ni
0.015 min 0.25 max 0.30 max 0.10 max 0.75 max

*Cr+Cu+Mo = 0.50% max

Tensile Requirements

Plate Thickness Tensile Rm Yield Re Elong. A
over 3 mm to 16 mm 490 - 610N/mm2 325 N/mm2 min 21% min
over 16 mm to 40 mm 490 - 610 N/mm2 315 N/mm2 min 21% min
over 40 mm to 63 mm 490 - 610 N/mm2 305 N/mm2 min 20% min
over 63 mm to 100 mm 490 - 610 N/mm2 * 19% min
over 100 mm to 150 mm 490 -610 N/mm2 * 19% min

*The value of yield strength for plates over 63 mm thick shall be the values specified for plates of thickness between 40 mm and 63 mm reduced by 1% for each 5 mm or part thereof increase in thickness over 63 mm.

Values

RT 0°C -20°C -30°C -40°C -50°C
61 J min 55 J min 47 J min 41 J min 31 J min 27 J min

Values apply to plates up to and including 80 mm thick