Cast Crucibles

The following information is intended as a general guide to assist in the selection and use of cast crucibles to obtain optimum performance. Whilst certain industry sectors have opted for specific refractory systems there are no absolute rules governing the choice of crucible material quality. Our Sales and Technical personnel will be pleased to work with our customers to achieve the optimum performance for their application.

Alumina Crucibles (FA2)

A high purity Al2O3 crucible which has good resistance to both acidic and basic slags. It is used for a wide range of alloys and stainless steels in vacuum and air melting applications. Maximum service temperature 1600°C.

Chrome Alumina Crucibles (CAL)

The addition of chromic oxide to alumina increases the resistance to slag attack and hence improves crucible life. Preferred material for more arduous air melting applications and for copper based alloys. Maximum service temperature 1800°C.

Magnesia Crucibles (M3)

This material has good resistance to basic slags and is used in the vacuum melting of superalloys as it is non-wetted by Ni, Co and Fe based alloys. Maximum service temperature 1650°C.

Alumina Mullite Crucibles (AM91 or AM91F)

The combination of alumina and mullite gives good thermal shock properties but could be attacked by acidic slags at high temperatures. Used for rare earth alloy melting. Maximum service temperature 1550°C.

Zircon Crucibles (Z1)

A fine textured product, zircon has good resistance to acidic slags and is mostly used for non-ferrous and precious metal melting e.g Platinum. Maximum service temperature 1600°C.