Background of BS 1501 Grade Pressure Vessel Steel
BS 1501:1980 Part 1, despite being officially withdrawn on 15th February 1993, remains a steel specification that is in regular use and we see daily sales and enquiries for grades that form a part of this standard particularly from our customers in the U.K.
BS 1501 224 specifies requirements for fully killed aluminium treated carbon manganese steel plates up to 150 mm thick in four grades which relate to minimum tensile strength. The plates may also be supplied having specified elevated temperature properties and low temperature impact properties. Plates are supplied in the normalised condition unless an alternative is agreed between supplier and purchaser.
BS 1501 224 490B LT50 Pressure Vessel Steel Specification
The grade BS 1501 224 490B LT50 shows that the steel will have a minimum tensile strength of 490 N/mm2 (490), has elevated temperature properties reported (B), and has low temperature impact properties specified at -50 deg C (LT50).
As well as BS 1501 224 490B LT50, we are also stockists of plates manufactured and certified to:
Comparable Steel Specifications
Although it is not uncommon to see this on steel company web sites, any suggestion that one steel specification and grade is an equivalent to another should be treated with caution. This is because of differences in the methodology and techniques used for testing.
However, BS 1501 224 490B LT50 is broadly similar to the following steel specifications:
Plates certified to these standards are held in stock by Brown McFarlane.
|0.22 max||0.10 - 0.40||0.90 - 1.60||0.030 max||0.030 max|
|0.015 min||0.25 max||0.30 max||0.10 max||0.75 max|
*Cr+Cu+Mo = 0.50% max
|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.
|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