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 for 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 of this product are of 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.

These products represent the latest developments in the field of free machining carbon steels and are the fastest machining steels available.

Leaded Grade A (12L14) is essentially resulphurized and rephosphorized screw machine stock to which lead has been added.

Leaded Grade AX is similar to Grade A, except that an additional machining agent, tellurium, has been added.

Also available are Leaded Grades AY and AZ, which contain Selenium and Bismuth, respectively, as machining agents.

These grades are produced under a number of trade names, among which are the following:

Leaded Grade A (AISI 12L14): Ledloy A, La-Led, Multicut Leaded
Leaded Grade AX: Ledloy AX, La-Led X
Leaded Grade AY: Multicut Leaded Selenium Treated
Leaded Grade AZ: Mach 5

(SCREW MACHINE STOCK) ASTM A108 - UNS G12130, G12150
Color Marking

1215 are resulphurized and rephosphorized free machining steels, commonly referred to as Screw Stock. They are improved free-cutting steels that have replaced the Bessemer B-1113 grade. They are especially suited for automatic screw machine operations where the major requirement is exceptional free-cutting quality with a good finish.

This is medium-carbon steel. The higher carbon content imparts higher strength properties than 1018. The hot rolled bars used in the manufacture of this product are of special quality. Most bars are cold drawn, although some larger sizes are turned and polished.

When higher degrees of dimensional accuracy and straightness are required, we recommend the use of PRECISION SHAFTING, which is produced by grinding and polishing.

Precision Shafting represents the highest degree of over-all accuracy, concentricity, straightness, and surface perfection attainable in commercial practice. After being ground on centerless grinders, bars are polished to a high finish and carefully straightened.

This grade is low-carbon high-manganese steel. It possesses much of the machining quality of 1212 Screw Stock but with improved mechanical properties. This grade also has excellent carburizing properties. Bars are produced from special quality hot rolled bars.
1117 is available as a leaded steel (11L17) in certain sizes. The addition of .15/.35 per cent lead improves free-machining characteristics without sacrificing carburizing properties.

This grade is low-carbon high-manganese steel. It possesses much of the machining quality of 1212 Screw Stock but with improved mechanical properties. This grade also has excellent carburizing properties. Bars are produced from special quality hot rolled bars.
1117 is available as a leaded steel (11L17) in certain sizes. The addition of .15/.35 per cent lead improves free-machining characteristics without sacrificing carburizing properties.

These grades are medium-carbon steels prossessing higher mechanical properties than other medium carbon steels, as well as free machining properties.

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.

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.

FATIGUE-PROOF is a medium-carbon free-machining steel with higher mechanical properties than its companion product, STRESSPROOF. These properties are produced by a process of drawing steel at elevated temperatures, developed and patented by LaSalle Steel Co. The result is a steel with high tensile strength, uniformity of properties, and excellent machinability.
This product possesses high strength as it is received from the mill, and no subsequent heat treatment is required. The strength is remarkably uniform from the surface to the center of the bar and from end to end. Properties are not adversely affected by exposure to temperatures up to 600°F. Where higher hardness is required, material may be selectively hardened by induction heating. Water quenching will produce Rockwell "C" 60, and oil quenching will yield Rockwell "C" 50-55.
FATIGUE-PROOF has excellent machinability for a material of its strength. In standard practice, it will machine up to 25% faster than annealed alloy steels and up to 75% faster than heat-treated alloy steels. Excellent dimensional stability is maintained. Tool use as well as surface finish is better.