Docol®Tube 780DP is advance high-strength formable precision tube made from dual-phase steel with high tensile strength, improved formability or enhanced proofed yield strength. Available in circular, rectangular and square shapes, it comes with different coating and surface options including cold rolled (uncoated), galvanized, galvannealed and galfan. Customized shapes and other tailoring options are available upon request. Typically used in automotive industry where durability, formability and energy absorption are important.
Docol Tube 780DP is available in circular, square and rectangular shapes.
Other shapes, sizes and lengths are available upon request.
CR600Y780T-DP
CR600Y780T-DH
CR600Y780T-DP
CR600Y780T-DH
Chemical composition meets the requirements of VDA 239-100.
1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.
1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.
1)For a maximum distance of 100 mm, the ends may, due to the cutting method, have diameters outside the tolerances.
Surface is slightly oiled to protect it from corrosion during transportation and short-term storage. By request, tubes can be delivered dry, however in that case SSAB will not be responsible for any possible rust.
1) Theoretical guidance values for coating thickness per surface.
2) Minimum coating mass - g/m2 refers the coating mass for each side in g/m2 according to VDA 239-100.
3) Minimum coating mass - g/m2 refers the total weight of coatings on both sides of a 1 m2 plate.
The tubes are not intended to undergo any heat treatment after welding and sizing as that may alter the mechanical properties of the material (+CR2 delivery condition according to EN 10305-3 and -5).
The tubes are oiled with anti-corrosive oil (S4 condition according to EN 10305-3 and -5).
Further Fabrication
Pre-heating of the tubes before bending and welding may lower the strength of the material. Docol Tube 780 is not suitable for hot dip galvanizing. Outside the welded area the surface roughness (Ra) is typically 0.25-0.75 μm.
Bending
The bendability of Docol Tube 780 steels is good and the recommended minimum bending radius is 2.5 x tube diameter. The optimal radial gap between mandrel and inside wall of the tube should be in the range of 0.10 to 0.15 mm.
Welding
Docol Tube 780 tubes have very low content of alloying elements in relation to the high strength of the steels and the weldability of Docol Tube 780 is very good. Recommendations in accordance to Eurocode 3 apply for welding. For information and recommendations for welding Docol Tube 780, see welding brochure for SSAB Docol products and Steelfacts at www.ssab.com.
For information concerning fabrication, see SSAB´s brochures on www.ssab.com or consult Tech Support.
Appropriate health and safety precautions must be taken when bending, welding, cutting, grinding or otherwise working on the products.