CASE HARDENING
Using the latest nitrogen-based atmospheres from Afrox/BOC gases combined with automatic carbon potential control, we assure customers of reproducible case depths of 0.1mm to 3.0mm with minimal distortion, even on mild steel.  The processes used are gas carburising, carbonitring and our very own Lambda process.

HARDEN AND TEMPER
Assorted components for all types of industry. Made from plain carbon and low-alloy steels, are hardened under controlled atmospheres, ensuring a scale-free, decarburisation-free surface finish. We also offer blackening after tempering, or a shot-blasted finish, if preferred.

NORMALISING AND ANNEALING
Normalising, under controlled atmosphere, is done to homogenise the grain structure of castings and to restore fine-grained properties of wrought steel after hot working.  We carry this out under controlled atmosphere to prevent decarburisation and scale. Annealing is also done.

CARBON RESTORATION
Investment castings usually have a decarburised surface of up to 0.4mm deep, owing to cooling in air after casting.  Medium carbon forgings and components which have been previously decarburised during annealing in air, are restored back to their original surface carbon content. This often applies to fasteners, etc.