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These are carbon-manganese free machining grades which have been severely cold worked to produce high tensile properties. The bars are specially treated to relieve the stresses set up by the cold working, thus minimizing the tendency toward warpage after machining which is common in ordinary cold.drawn bars.
These steels have built-in high strength hardness, and wearability, without the necessity of heat treatment. Thus they are often used for parts requiring mechanical properties ordinarily obtained by heat treating an alloy grade to the Rockwell C hardness range of 23-30 after machining.
Both grades are available as Cold Drawn Bars or Ground and Polished Bars. The latter possess the close tolerances and fine finish normally found in ground and polished bars, plus the combination of free machinability, minimum warpage, high strength and wearability not found in ordinary steels.

Stock Lengths: 12' Approx.

ASTM A311 Class B

Color Marking: Ends painted Gray
Unit of Measure
Items Rounds
7/32
Stressproof-Cold Drawn Finished Carbon Steels-Rounds
Rounds
1/4
Stressproof-Cold Drawn Finished Carbon Steels-Rounds
Rounds
17/64
Stressproof-Cold Drawn Finished Carbon Steels-Rounds
Rounds
9/32
Stressproof-Cold Drawn Finished Carbon Steels-Rounds
Rounds
5/16
Stressproof-Cold Drawn Finished Carbon Steels-Rounds
Estimated Weight per Foot N/A .1280 lb N/A .1671 lb N/A .1886 lb N/A .2114 lb N/A .2610 lb
Estimated Weight 12-Ft. Bar N/A 1.540 lb N/A 2.005 lb N/A 2.263 lb N/A 2.537 lb N/A 3.132 lb