Shipbuilding Steel Plate – These plates are in high demand especially from oil and gas industry as they require thick plates of extremely good quality. Most of these are made according to the specifications of the customers and the steel used is certified because a small lamellar tear can be fatal.
Property | Grade A | Grade B | Grade D | Grade E |
% of Carbon | 0.21 max | 0.21 max | 0.21 max | 0.18 max |
% of Manganese | 2.5 times %C min | 0.8 times %C min | 0.6 times %C min | 0.7 times %C min |
% of Silicon | 0.5 max | 0.35 max | 0.1 – 0.35 | 0.1 – 0.35 |
% of Phosphorous | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
% of Sulphur | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
% of Aluminum | – | – | 0.015 min | – |
Ultimate Tensile Strength (N/mm2) | 400-520 | |||
Yield Strength (N/mm2) | 235 | |||
% Elongation | 22 | |||
Temperature at which Impact test is done (deg Cel) | NA | 0 | -20 | -40 |