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General Information

Closed die forging

Closed die forging can produce homogeneous products, with excellent mechanical characteristics.

  • Good repeatability
  • Highly homogeneous material with mechanical properties
  • High production speed
  • Economical process compared with welding assemblies
Possible alloys
  • Steel, alloy steel, tool steel and stainless steel
  • Aluminium, bronze and copper alloys
Technical specifications
  • The tolerances of steel forgings are as per EN 10243-1, and the following criteria are decisive:
    • Forge weight
    • Shape of the tool division
    • Category of the steel (high or low alloy)
    • Form complexity factor, which depends on the factor between the weight of the component and the envelope weight
  • Weight: Approx. 200 grams – 120 kg, while shaft products can weigh up to 200 kg
  • Maximum dimensions: length 1,200 mm
  • Forging wall thickness: ≥ 4 mm
  • The geometric tolerances that are required for the function should be specified in the drawing
  • The most important tolerances apply to:
    • Length, width, height and thickness dimensions
    • Finishing of the forging edge
  • An adequate draft angle should be provided; a good guideline is at least 3° for aluminium and 5° to 7° for steel
  • Use large radii to avoid quick tooling wear or cracks in forgings
  • Ribs should be low and wide
  • The various cross-sections must be balanced to prevent extreme variations in the flow of the metal
  • The tooling division must run through the centre of the forging and not along one side. The forging needs to be detachable from this division
Finishing options
  • Electrolytic zinc plating
  • Hot-dip galvanising
  • Vibra-polishing
  • Blasting
  • Primer, wet painting and powder coating

As BIC, we support you in the delivery of forged steel and aluminum forged parts as well as cast parts made of various materials such as grag cast, nodular cast iron, cast steel, stainless steel, aluminum, iron and copper. BIC supports its customers in the fields of automotive, commercial vehicles, agricultural machinery, pumps, general mechanical engineering, rail technology, food technology, construction technology, vehicle construction, hydraulic components, drive and conveyor technology, compressors, medical technology. BIC is your manufacturing partner for cast parts made of ferrous and non-ferrous metals. We have the capacity to produce parts from 100 grams up to 30,000 kg.