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All Categories > Carbon Bars, Plates, Tubing and Structural > Cold Finished Carbon Steels > 1018-Cold Finished Carbon Steels > 1018-Cold Drawn Finished Carbon Steels-Hexagons > Size 5/8  
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Size 5/8, 1018-Cold Drawn Finished Carbon Steels-Hexagons



A low-carbon steel, having higher manganese content than certain other low-carbon steels, such as 1020. Being richer in manganese, 1018 is a better steel ior carburized parts, since it produces a harder and more uniform case. It also has higher mechanical properties and better machining characteristics. The hot rolled bars used in the manufacture oi this product are oi special quality.

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'





Specifications  · Analysis  · Applications  · Mechanical Properties  · Machinability  · Weldability  · Hardening

Specifications

Estimated Weight per Foot

1.151 lb

Estimated Weight 12-Ft. Bar

13.82 lb


Analysis
Carbon .15/.20
Manganese .60/.90
Phosphorus .04 Max.
Sulphur .05 Max.



Applications
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
The following values are average and may be considered as representative of the grade:

1" rd., cold drawn
Tensile Strength - 85,000 psi
Yield Strength - 70,000 psi
Elongation in 2" - 28%
Reduction of Area - 55%
Brinell Hardness - 167

7" rd., turned & polished
Tensile Strength - 70,000 psi
Yield Strength - 45,000 psi
Elongation in 2" - 36%
Reduction of Area - 58%
Brinell Hardness - 143



Machinability
1018 has a machinability rating of 78%, based on 1212 as 100%. Average surface cutting speed is 130 feet per minute.



Weldability
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
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.



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