Most cold finished bars are produced by cold drawing. In this process, oversize hot rolled bars, which have been cleaned to remove scale, are drawn through dies to the required size. The larger sizes are generally turned and polished, the hot rolled bars having been machine turned, rather than drawn, followed by abrasive polishing. Turned and polished bars tend to have a somewhat brighter finish than cold drawn bars.
A greater degree of dimensional accuracy and straightness in round bars is obtained by grinding and polishing. The product resulting from this process is known as PRECISION SHAFTING.
Stock Lengths: 10' to 12'
Applications
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N/A Suitable for parts requiring cold forming, such as crimping, swaging or bending. However, for severe bends, stress relieving may be necessary to prevent cracking. Especially suitable for carburized parts requiring soft core and high surface hardness, such as gears, pinions, worms, king pins, chain pins, ratchets, dogs, etc. |
Mechanical Properties
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N/A
The following values are average and may be considered as representative of the grade:
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Machinability
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N/A 1018 has a machinability rating of 78%, based on 1212 as 100%. Average surface cutting speed is 130 feet per minute. |
Weldability
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N/A This grade is easily welded by all the welding processes, and the resultant welds and joints are of extremely high quality. The grade of welding rod to be used depends on the thickness of section, design, service requirements, etc. |
Hardening
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N/A This grade will respond to any of the standard carburizing methods and subsequent heat treatments. For a hard case and tough core, the following heat treatment is suggested: Carburize at 1650°-1700°F for approximately eight hours, cool in box and reheat to 1400°-1450°F. Quench in water and draw at 300°-350°F. |
