Weld Overlay/cladding

Weld Overlay (WOL), also known as cladding, hardfacing, weld cladding, or weld overlay cladding, is a process where one or more metals are joined together via welding to the surface of a base metal as a layer. This is normally done to improve the material by adding either a corrosion resistant or hardfacing layer to it. Surfaces prepared in this way can even be highly customized by layering and alloying multiple different materials together.

Weld overlay is commonly used within the gas industry and can be used on components as diverse as pipes, fittings, valves, and vessels. While most components have a certain amount of corrosion allowance built in, wastage rates can still be excessive for certain materials. Thus weld overlay provides surface protection while still allowing the internal component enough strength to meet appropriate codes and standards.

Benefiting from our advanced DSP or PLC controlled welding stations and optimized producing process, we offer very low dilution of alloy deposite. Real time video monitoring and recording system ensure perfect tie in and weld path. Iron (Fe) content of the Inconel 625 cladding layer can reach less than 5% in the surface 1 mm below the top surface with minimum 3mm total layer thickness.
The CRA layer will be achieved by weld overlay, so that our customers will obtain better anticorrosion and wear resisting property at a lower cost thereby extend the service life of piping system.

Cladding VS Carbon Steel and CRA Steel
Cladding Carbon Steel CRA Steel
Service Life Longer Shorter Longer
Safety Anti Corrosion +
High Mechanical Property
High Mechanical Property Anti Corrosion
Weight No Additional Corrosion
Allowance Needed
Additional Corrosion
Allowance Needed
Heavier, due to lower
mechanical property
Purchase Welding Wire in Stock Easy to Purchase Hard to Purchase and
Long Delivery
Cost Impact much cheaper than CRA steel Low Cost Expensive


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