a ’50’ Carbon Chromium-Molybdenum Alloy Steel with Improved Machinability
A general purpose alloy machinery steel with improved machinability as a result of an aim sulfur content. The product may or may not include the injection of a minute quantity of calcium. The calcium treatment modifies the sulfide inclusions in the steel to a much more globular form. Calcium also combines with the aluminates to form softer inclusions. The net effect (sulfur and calcium) is improved machinability and longer tool life.
Bars are supplied in the heat treated and stress relieved condition to a hardness level of approximately HB300 and are suitable for many service applications where strength and toughness are required