1020/1.0402 Carbon Steel

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1020/1.0402 Carbon Steel

AISI 1020 carbon steel is a low carbon steel which has at least 0.17%C and 0.3%Mn. It has a good combination of strength and ductility and can be carburized,but due to its low carbon content, it is difficult to induction hardening or flame hardening. Due to lack of alloying elements, it is not suitable for nitriding.AISI 1020 steel can be easily machined,and can be welded easily using all of the traditional methods.

Chemical Composition

10200.18-0.230.15-0.350.30-0.60≤ 0.040≤ 0.050

Mechanical Property

Diameter mmTensile Strength MpaYield Strength MpaElongation %Reduction of area %Condition
≤ 16500 – 650≥ 340≥20≥50Quenched and tempered
>16 – 40470 – 620≥290≥22≥50
≤ 16≥430≥240≥24Normalised
>16 – 100≥410≥3210≥25


Forging temperature:950-1200℃,air cooling after forging.

Heat Treatment

Heat Treatment ProcessTemperature RangeCooling Method
Normalising880-920°CAir cooling
Soft annealing680-710°CFurnace cooling
Hardening860-900°CWater quench
Tempering550-660°CAir cooling


AISI 1020 steel can be largely utilized in all industrial sectors in order to enhance weldability or machinability properties. It is used in a variety of applications due to its cold drawn or turned and polished finish property.

AISI 1020 steel is also  used in case hardened condition,and it finds use in the following components:

  • axles
  • general engineering parts and components
  • machinery parts
  • shafts
  • camshafts
  • gudgon pins
  • ratchets
  • light duty gears
  • worm gears
  • spindles
  • cold headed bolts
  • automotive components


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