ASTM A36 is the most commonly used mild and hot-rolled steel. It has excellent welding properties and is suitable for grinding, punching, tapping, drilling and machining processes. ASTM 1018 is a low carbon steel with good case hardening qualities. It has an excellent weldability and produces a uniform and harder case and ASTM 1018 is considered as the best steel for carburized parts. Yield strength of ASTM A36 is less than that of cold roll ASTM 1018 steel, thus enabling ASTM A36 to bend more readily than ASTM 1018. Normally, larger diameters in ASTM A36 are not produced since ASTM 1018 hot roll rounds are used.
Machining: The machinability rate of ASTM A36 is estimated to be 72%, and the average surface cutting feed of ASTM A36 is 120 ft/min. Machining of ASTM A36 steel is not as easy as that of AISI 1018 steel.
ASTM A36 steel has the following applications: It is used in bolted, riveted or welded construction of bridges, buildings and oil rigs.
It is used in forming tanks, bins, bearing plates, fixtures, rings, templates, jigs, sprockets, cams, gears, base plates, forgings, ornamental works, stakes, brackets, automotive and agricultural equipment, frames, machinery parts.
ASTM 1018 steel is mainly used for parts requiring cold forming, such as crimping, swaging or bending.Also used on carburized parts requiring soft core and high surface hardness such as king pins, gears, dogs, etc.
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