The process of cold drawing steel is a procedure by which metal is formed in order to achieve complex profile cross sections of excellent precision. After careful pre-treatment and descaling the special profile bars are drawn through a forming die. This operation can be repeated up to three or four times.
Cold drawing of hot rolled steel and hot extruded special profiles tightens the cross-sectional tolerances, thus leading to significant improvement in dimensional accuracy and surface quality. Cold drawn special profiles offer the same precision achieved by machining - but without the waste.
Cold drawn special profiles offer extensive advantages, among other things:
|Approx. Max. Circumscribed Circle Dia. [mm]||200|
|Approx. Max. Flat Steel Width [mm]||300|
|Min. Wall Thickness [mm]||4|
|Max. Length [mm]||11000|
|Length||Up to 11,000 mm (depending on profile cross-section), with sawn ends (fixed lengths by agreement)|
|Min. Weight [kg/m]||1.5|
|Max. Weight [kg/m]||120|
|Cross-Sectional Tolerances/ Straightness Tolerances||Dimensional tolerances by agreement up to max. 0.05 mm, depending on cross- section and materials Straightness tolerances and twist: 1 mm/1 m on supply length or by special agreement|
|Materials / Treatments||Nearly all quality and stainless steels in the iron and steel list, special steels, non-ferrous heavy metal alloys|
All required heat treatments are available