Flat products made of weldable, hot-rolled, high yield strength alloy quality and special steels for cold forming.
Weldability: The steels specified in this European Standard are appropriate for current welding methods.
With increasing product thickness and increasing strength level, cold cracking can e caused by the amount of diffusible hydrogen in the weld metal; a brittle structure of the heat-affected zone, and significant tensile stress concentrations in the welded joint.
These steels have minimum yield strengths ranging from 315 MPa to 460 MPa for thicknesses ranging from 1.5 mm up to 20 mm. In thicknesses of 1.5 to 16 mm these steels have minimum yield strengths of 500 to 700 MPa.
Figure. Elongation of EN 1049 steels decreases as Yield Strength increases
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