This is hot or cold-rolled steel with a zinc coating applied by a continuous hot-dip galvanising process, which gives excellent corrosion resistance and very good formability.
It is produced with a very wide range of qualities: mild steels for bending and drawing, structural steels, and steels with a very high yield strength.
It is available as sheet or coiled steel in thicknesses from 0.20mm to 6.35mm and widths from 80cm to 188cm depending on the substrate used.
Coating thicknesses range from Z100 to Z350.
It is joined by welding, clinching or adhesive bonding.
Options: Surface appearance, finished surface, passivation, oiling.
Can be protected by a thin dry organic film.
Our hot dip galvanised steels consist of a steel substrate with a metallic zinc coating applied by means of a continuous hot dip galvanising process. Metallic zinc coatings are available in steel grades ranging from steel for bending and deep drawing applications, to structural steels and high yield strength steels.
A glossy surface finish obtained under specific skin-pass conditions (either non-skin-passed or skin-passed with smooth cylinders to obtain low roughness) can be provided if required at time of enquiry.
Hot dip galvanised products offer excellent corrosion resistance combined with very good forming properties. The coating process can apply very thick zinc layers, up to 725 g/m?(total of both sides).
Our hot dip galvanised steels can be used in a very wide range of applications for industrial markets, both indoors and outdoors. Some of the most common applications are:
Building: wide sections for roofing and cladding, doors, door frames, metallic ceilings, partitions, structural members etc
Domestic appliances: all appliances for this sector (both white and brown goods) are manufactured with hot dip galvanised steels
Miscellaneous: electrical cabinets, aeraulic components, air conditioners, road signs etc
Zinc hot dip galvanised steel is suitable for contact with foodstuffs under certain conditions, as specified in European directive 89/109/EEC and French standard NF A 36-712-1. Please contact us for further information on this subject.
Recommendations for use
Galvanised strips are usually supplied passivated or oiled to temporarily limit any risk of white rust formation. During transport and storage, all necessary precautions must be taken to keep the material dry and to prevent the formation of condensation. Improved protection can be achieved by the application of an Easyfilm® thin organic coating (please see data sheet E80 for the specific properties of Easyfilm®).
Forming and joining
The forming and joining techniques currently used for uncoated steel are also suitable for galvanised steel.
It is essential to select a coating thickness that is compatible with the forming and joining processes envisaged, without compromising the desired degree of corrosion protection.
Hot dip galvanised steels can be painted after degreasing and surface treatment when supplied oiled. If an Easyfilm® thin organic coating has been applied, they can be painted directly, without any prior surface treatment. However, the paint must be compatible with the Easyfilm® resin.
In electrical resistance welding, the welding current must be suitably regulated and regularly adjusted. Electrode life can be extended by regularly stepping up the welding current and periodically dressing (machining) the electrodes.