BS 1501 Grade 225 specifies the requirements for fully killed niobium and aluminium treated carbon manganese steel plates up to 150 mm thick in two grades. The plates may be supplied having specified low temperature impact properties and elevated temperature properties.
The grade BS 1501 225 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 225 490B LT50, we are also stockists of plates manufactured and certified to:
BS 1501 223 490B LT30 BS 1501 224 490B LT50
Chemical Requirements Chemical composition (ladle analysis, %) of steel 225 Grade 490
| C | Si | Mn | P | S | Nb | ||
| 0.20 max | 0.10 - 0.50 | 0.90 - 1.60 | 0.030 max | 0.030 max | 0.01 - 0.06 | ||
| Al (metallic) | Cr* | Cu* | Mo* | Ni* | |||
| 0.015 min | 0.25 max | 0.30 max | 0.10 max | 0.75 max | |||
| Plate Thickness | Tensile Rm | Yield Re | Elong. A | ||
| over 3 mm to 16 mm | 490 - 610 N/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 | ||
Charpy V-notch impact values
Impact test values, average of three at temperature specified below
| -20oC | -30oC | -50oC | ||
| 61 J min | 47 J min | 27 J min | ||
| Place of Origin | Not Given |
| Minimum Order Quantity | Not Given |
| Supply Ability | Not Given |
| Packaging Details | Not Given |
| Delivery Details | Not Given |
Not Given
