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12L14

 
 
 
 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



12L14 is a resulphurized, rephosphorized screw machine steel with added lead content and is often referred to as a “free machining” steel.  Due to added lead content and high sulphur and phosphorous levels, 12L14 forms a lubricating effect, resulting in extremely fast machining rates. 12L14 produces a smooth, machined surface and because of its low friction component allows for increased tool life.

 

12L14 free machining steel

 

Minimum Properties

Ultimate Tensile Strength, psi

78,300

 

Yield Strength, psi

60,200

 

Elongation

10.0%

 

Rockwell Hardness

B84

 

 

Chemistry

Iron (Fe)

97.91 - 98.7%

 

Carbon (C)

0.15% max

 

Manganese (Mn)

0.85 - 1.15%

 

Phosphorus (P)

0.04 - 0.09%

 

Lead (Pb)

0.15 - 0.35%

 

Sulfur (S)

0.26 - 0.35%

 

 

The above values are average and may be considered as representative of 12L14 cold rolled steel.

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