From EDRO’s flagship stainless holder material RoyAlloy, to Böhler’s unique insert steels, our premium stainless steels are able to withstand the toughest requirements.

Plastic Injection Molding

Plastic Extrusion

Rubber Molding

Blow Molding

RoyAlloy was developed by EDRO to provide superior performance in all important areas of manufacturing and operation for the plastic and rubber mold tooling industries. Extensive machining trials have shown that this material is readily machined, provides excellent surface finishes and thread quality. Special production procedures provide superior surface quality and flatness. Bend tests have demonstrated that this material can tolerate moderate amounts of cold flattening without breakage. Heat treating and microstructure of the material provides excellent dimensional stability after machining, without need for stress relieving or excess stock oversize. RoyAlloy is also suitable for texturing and photoetching.


RoyAlloy is a 400 series martensitic stainless steel supplied prehardened.

  • Excellent machinability
  • Good corrosion resistance
  • Uniform and consistent hardness in all dimensions
  • Good compressive strength
  • Excellent ductility and toughness
  • Dimensionally stable
  • Excellent surface finish and threads
  • Good weldability
Technical Specifications

Corrosion Resistance

Machinability Supplied



Wear Resistance

  • Plastic and rubber molds
  • Plastic mold bases
  • Blow mold inserts
  • Constructional parts
  • Plastic extrusion
  • Round Bar
    • Saw Cutting
  • Flat Plate
    • Saw Cutting
    • 6 Side Processing
    • Surface Grinding
    • Gun Drilling