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Bar-Lines Application Articles

Dura-Bar Gets the Lead Out

 

park and no leadProducers of 12L14 steel add lead to their product to improve machinability. But while lead may help steel become more machinable, it can mean higher costs for disposal of chips and coolant. Lead-free Dura-Bar 65-45-12 ductile iron offers better machinability -- and without the added environmental issues.

Rather than lead, Dura-Bar's machinability stems from the presence of graphite nodules within the material's matrix. The graphite enhances Dura-Bar's machinability by acting as a chip-breaker during machining.  It also dissipates heat and reduces the frictional forces between the insert edge and the piece being worked.

Dura-Bar's graphite also permits it to be machined faster than most steels.  In fact, Dura-Bar is capable of being rough machined above 1,100 surface feet per minute (SFM) and finished at speeds up to 2,200 SFM with normal carbide inserts and perhaps even faster with inserts specially designed for use with Dura-Bar.

Faster machining means reduced cycle times and lower per-part costs. Dura-Bar is 8% lighter weight than steel, which can further add to the cost savings.  Also, because Dura-Bar is readily available from stock, the problems associated with long lead times for some leaded steel sizes can be avoided with Dura-Bar.

To learn more about how to maximize your customers' machining savings with Dura-Bar, check out Dura-Bar's Machining Guide page - you will see a preview of the guides' topics, such as comparisons to steel, optimal machining speeds and feeds, depths of cut and chip control, and you can download a .pdf of the guide.

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