Conventional steel contains a number of inclusions that have a negative impact on machinability.
During our CaSi treatment carefully controlled amounts of Calcium are added to steel in our ladle furnace at precisely correct temperatures. This process transforms hard Aluminium Oxides, which are a main cause of tool wear into plastic Calcium Aluminates with an outer layer of Calcium Sulphide. The Sulphide layer "melt" during machining to form a lubricating layer between the cutting tool and the component, resulting in better machinability.

Structural steels ranges from 0.1% to 0.6% in carbon contents and weldability is one of the most important requirements. Most structural steels are used in the "as rolled" condition, but occasionally they are quenched and tempered or case-hardened.

Machining steel is suitable especially for chip-cutting machining. It can also be used for forging. The steel is not usually included in its original form in the particular construction. Carbon content is between 0.20 - 0.60%.

Quenched and tempered steel is used in cases where high strength and favourable toughness are required.
Carbon content is between 0.25 and 0.50%. These steels are normally supplied hot-rolled but are also available in a quenched and tempered condition.

Case hardening steel is a mild steel with a low carbon content and is frequently machined for a particular component before being case hardened and ground to the final dimensions. Case hardening steels are ideal for components requiring a combination of properties such as abrasion resistance, toughness, resistance to impact and shock stress as well as fatigue strength.