Patent ID: 7588837

Claim:
A weldment comprising: a first element formed from a low carbon steel having a carbon content not exceeding 0.30% by weight; a second element formed from steel and having a surface at which the two elements are joined together, the steel of the second element, at least at the surface where the two elements are joined together, being a high carbon steel having a carbon content of at least 0.60% by weight and a hardness exceeding 58 HRC; a lap weld forming a bond between the two elements to join the two elements together and having created within the second element a heat affected zone around the weld; the heat affected zone along the weld having a hardness that does not exceed 58 HRC, the heat affected zone containing martensite and retained austenite, with the austenite near the weld being at least about 30% by volume fraction.