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- BS 1501 was officially withdrawn on 15th February 1993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