BS 1501 223 490B LT30

  • Pressure

BS 1501 223 490B LT30

  • BS 1501 was officially withdrawn on 15th February 1993
  • Remains a steel specification that we see from our customers on a regular basis
  • Brown McFarlane ensures that it stocks plates that are certified in accordance with various grades of BS 1501

BS 1501 223 490B LT30 - the specification

The grade BS 1501 223 490B LT30 shows that the steel will have a minimum tensile strength of 490 N/mm2 (490), suitable for use where elevated temperature properties are required, and has low temperature impact properties specified at -30 deg C (LT30). Our stock material will very often be impact tested at -50 deg C.

BS 1501 224 490B LT50
BS 1501 225 490B LT50

 
 
 

Requirements

Chemical Requirements

CSi Mn S
0.20 max 0.10 - 0.50  0.90 - 1.60  0.030 max 0.030 max
Nb Cr* Cu* Mo*  Ni 
0.01 - 0.06 0.25 max 0.30 max 0.10 max 0.75 max

*Cr+Cu+Mo = 0.50% max

Tensile Requirements

Plate ThicknessTensile RmYield ReElong. A
over 3 mm to 16 mm 490 - 610N/mm2 355 N/mm2 min 21% min
over 16 mm to 40 mm 490 - 610 N/mm2 345 N/mm2 min 21% min
over 40 mm to 63 mm 490 - 610 N/mm2 340 N/mm2 min 20% min
over 63 mm to 100 mm 490 - 610 N/mm2 * 20% min
over 100 mm to 150 mm 490 -610 N/mm2 * 20% min

Impact Values

RT0°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