Cast Iron

A versatile material. Find out whether cast iron is suitable for your project.

Lamellar / Grey cast iron

Grey cast iron or lamellar cast iron is an iron alloy with typically 3 to 4% carbon. The carbon is present in the structure as graphite laminates.

It is relatively cheap to produce and is easy to process. Due to the shape of the graphite fins, grey cast iron has the property of dampening noise as well as vibrations and conducting heat. Grey cast iron is rather brittle compared to ductile cast iron and steel. The rather low tensile strength is compensated by a very good compresssion strength.

Common alloys:

  • EN 1561: EN-GJL-150 / EN-GJL-200 / EN-GJL-250 / EN-GJL-300
  • GG15 GG20 GG25 GG30

Grey cast iron can also be alloyed with Nickel. Ni-resist is suitable for corrosive environments.

Ductile cast iron

Ductile iron is characterized by the spheroidal graphite or nodules. By adding magnesium in the melt, the graphite solidifies in this way.

Nodular cast iron has much better mechanical properties than grey cast iron. In some applications it can be used as an alternative to steel.

Common alloys:

  • EN 1563: EN-GJS-400-18 (RT/LT) EN-GJS-400-15 EN-GJS-450-10 EN-GJS-500-7 EN-GJS-600-3 EN-GJS-700-2 EN-GJS-800-2.
  • GGG40 GGG45 GGG50 GGG60 GGG70 GGG80

There are also some specific types of ductile iron known by the following names:

  • ADI cast iron: heat-treated, very high tensile strength and hardness in combination with high elongation.
  • SiMo: good mechanical properties at high temperatures (up to 700°C).
  • Ni-resist: ductile cast iron for corrosive application
Vermiculair cast iron

The carbon occurs in the form of "exploded" graphite. It is in fact 'failed' ductile iron. It combines good thermal conductivity properties of lamellar cast iron with higher tensile strengths. The disadvantage is that the production process has to be followed very precisely in order to obtain the right quality.

White cast iron

In white cast iron, the graphite is not freely present in the solidified state due to rapid cooling or due to an addition in the alloy. Together with iron, the carbon forms needle-shaped structures called carbides. These structures are detrimental to the mechanical properties. White cast iron is very hard, wear-resistant, but also very brittle.
White cast iron is almost exclusively used when high resistance to abrasive wear is required. For example dredging pumps, wear plates...
Ni-hard alloys are also part of the so called white cast irons. These alloys are strongly alloyed with Ni, Cr and Mo. Hardness 60 upto 65 HRC can be achieved.

Gearbox - GG25 - EN GJL 250
Cooling ring - stator EN GJL 250
Sampling mould EN-GJV-350 vermicular cast iron
Wear plates for wood pulverizing mill GX300CrMoNi15-2-1 white cast iron
Suspension hook EN-GJS-400-18
Reduction gearbox EN-GJS-400-18
Cylinder piece EN-GJS-600-3
Ring EN-GJS-600-3
Elbow for pulverized coal EN-GJL-250
Swivel head EN-GJS-400-18
Bridge support parts EN-GJS-400-18
Bridge support parts EN-GJS-400-18
Cyclone EN-GJL-250
Cast iron staircase EN-GJS-400-18
Ornamental decoration EN-GJS-400-18

Products in cast iron:

  • Machine parts
  • Wheels
  • Wear plates
  • Grids
  • Columns, ornaments
  • Frames
  • Casings
  • ...

Are you looking for cast iron castings? 

Related projects


Counterweights for movable bridge

Melting — Hand moulding — Pattern making — Casting — Standards - certification - measuring — Destructive testing


Rotor blades for mixer units

Melting — Hand moulding — Pattern making — Casting — Machining


Bridge bearings Bracquegnies

Hand moulding — Pattern making — Design and casting simulation — Machining — Destructive testing


Propeller mixer blades

Melting — Hand moulding — Pattern making — Design and casting simulation — Casting — Machining