Carbon Hot Rolled Round Steel Bar

Hot rolled steel bars are used for general purpose applications. This steel is a low carbon grade, having good over-all mechanical properties. It is easy to fabricate by the usual structural methods, such as mild cold and hot forming and welding.

Below you will find a comprehensive chart detailing each grade, their applications and size range stocked for ROUND shaped bars.

tolerances chemistry-and-mechanical

GradeASTM Size RangeLength
1018A576
Chemistry
Tolerances
1/2" to 12" Round20' RL
Description: A low-carbon steel having a higher manganese content than mild steel and certain other low-carbon steels. Being richer in manganese, it’s a better steel for carburized parts, since it produces a harder and more uniform case. It also has higher mechanical properties, including Brinell hardness, and better machining characteristics. In its production, special manufacturing controls are used for chemical composition, heating, rolling, surface preparation, etc. The result is a quality product suitable for applications involving forging, heat treating, cold drawing, machining, etc.
Application: Since 1018 is a good carburizing steel, it is especially suitable for parts requiring high surface hardness with a relatively soft core, such as gears, pinions, worms, kingpins, chain pins, ratchets, dogs, oil tool slips and liners. 1018 is also often specified for studs, anchor pins, special bolts, tie rods, etc.
1045A576
Chemistry
Tolerances
1/2" to 12" Round20' RL
Description: This medium-carbon steel in their production, special controls are used for chemical composition, heating, rolling, surface preparation, etc. As a result of this careful processing, these bars are suitable for applications involving forging, heat treating (including flame hardening), cold drawing, machining, etc.
Application: This grade, particularly when heat treated, should be used where greater strength is required than can be obtained from the lower carbon steels. A few of the most frequent uses are for axles, machinery parts, stud bolts, ordinary shafts, pinions, gears, rock screens, forming dies, tool shanks.
1141A576
Chemistry
Tolerances
2" to 12" Round20' RL
Description: This is medium-carbon, manganese steel. It is melted to special bar quality and fine-grain specifications, possessing high consistency and uniformity. Strength characteristics are high in the as-rolled condition, and greater hardness and strength may be obtained through heat treatment. Machinability is excellent, due to addition of sulphur.
Application: This grade is used to advantage in applications where good machinability combined with higher strength is required, such as axles, studs, bolts, shafts, tie rods, etc.
A36A36 Chemistry
Tolerances
1/2" to 3" Round20' RL
Description: Hot Rolled Mild Steel Bars are used for general purpose applications. This steel is a low carbon grade, having good over-all mechanical properties. It is easy to fabricate by the usual structural methods, such as mild cold and hot forming and welding. It is easy to fabricate by the usual structural methods, such as mild cold and hot forming and welding.
Application: This material is used for general purpose structural and miscellaneous non-critical applications that involve mild cold bending, mild hot forming, punching, and welding. Such applications include parts for general machinery, agricultural implements, transportations equipment, etc. It is used where seams and other surface imperfections may be tolerated.
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