Special sulfur iron alloy for steel mills S40#

Detailed introduction: Special sulfur iron alloy for steel mills S40# is used for ferro sulphur in free cutting steel smelting/casting, which can improve the cutting performance and mechanical properties of steel effectively. It not only can reduce the cutting force and cutting temperature for significantly improving the tool life, but also can reduce the surface roughness of the workpiece for improving the chip processing property. When the sulfur in cast molten iron is too low, it is harmful to the casting, thereby resulting in poor casting inoculation effect, poor graphite shape and poor cutting performance. Therefore, resulfurization is required. The suitable content in molten iron is 0.07%-0.12. Sulfur makes the length of graphite shorter within the range, the end becomes blunt, and the shape is curved, thereby improving the mechanical properties.High quality steel plant specific sulfur iro…