Hard welded plates

Wear Protect WMW

One of the most commonly used wear-resistant materials is the so-called “hard-welded plate. These are base plates made of ordinary steel (S235JR, formerly ST. 37-2), which are coated with a wear-resistant layer using a welding process. So, for the record, no new plate is being welded onto the base plate. In the welding process, a welding wire melts steel into a weld pool. To this one adds a powder with chromium as its main ingredient, which reacts with the carbon in the molten bath, forming chromium carbides. These again – divided into the weld bead about 2.5 to 3 cm wide – are placed over the steel. The welding machine thus applies a new hard coating job by job.

Twelve times more durable than steel

The chromium carbides in the weld layer are very hard, up to 1700 HV, while the final weld layer is about 60-62 HRc (units of measurement for hardness), depending on the quality chosen. A hard-welded plate therefore lasts up to 12 times longer than normal steel when in abrasive contact with abrasive material, and four to five times longer than hardened steel, such as Swedish Hardox. We aim for the right combination of properties for standstill time extension until the fixed production stop of the plants. Our experts will be happy to advise you on the most suitable application in your process.

Highlights
hard-welded plates

  • wear-resistant overlay on steel backing (S235JR)
  • 12x more wear resistant than S235JR in abrasive applications
  • stand time extension to periodic production stop
  • application in all industrial sectors
  • wear-resistant site segments such as floor and wall coverings or in structures such as pipes, bends and cyclones
  • also customization and assembly

Applications

We use hard welded plates in wear protection in or on troughs, bunkers, paddle forms, mixer liners, chutes, cyclone walls, fans, impeller housings and mixer blades. We choose the right thickness and quality depending on the application and processability (setting, rolling).

The photo shows hard welded steel on an impeller for dust extraction, used in recycling. Because hard welded steel is also heat-resistant, we also apply it to dust extraction from furnaces in steel or glass production. We can also make wear-resistant piping from welded-on plate, including wear-resistant bends. The material is so ductile that a minimum diameter of 300mm is achievable.

By the way, we also use chromium/tungsten and other types of filler wire for very specific applications, such as armoring propeller blades with filler beads or to fill the seam between two welded-on plates mounted side by side with wear-resistant material. Read more about this on the page about welding wire.

Technical details

Hard-welded plates are available in thicknesses of 3+3, 5+3, 6+4, 6+6, 8+5, 8+8 and 10+10 mm. Where the first number represents the thickness of the support and the second represents the thickness of the wear resistant welded-on layer. By the way, weld-on layers thicker than 10mm are also possible on request. We supply the sheets in standard sizes 1150×2400 mm and 1400×2900 mm. In addition, many of our customers also order custom sheet metal for a specific application. In this case, we take care of the measuring and drawing, production and possibly even assembly of the wear-resistant welded-on material.

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A bend that we kept having to replace is now holding out until the regular production stop.

Learn more

Our products find their applications in a wide variety of industries. Wherever wear and tear occurs, Wivé can contribute to wear protection and thus extend service life. Also in your processes? Definitely. Contact us for an introduction to our wear protection experts, or request a quote right away!