C20 Grade Introduction:

C-20 carbon steel is an unalloyed low carbon mild steel grade supplied as a hot rolled or bright drawn finish bar. As a low carbon steel grade, it provides low strength with good machinability and is suitable for welding.

C20 Grade Application:

Commonly used for general engineering C-20 is suitable for applications such as bolts, shafts, spacers, hubs, base plates, brackets. fixtures and jigs.

C20 Equivalent grades:

C20 Chemical composition:

The following table shows the chemical composition of C20 steel:

C20 Mechanical Properties:

C20 Hardness:

121

C20 Heat treatment:

When hardening C-20 heat treatment temperatures, including the rate of heating, cooling, and soaking times will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities.

C20 Hardening:

As a low carbon steel C-20 is not ideally suited for heat treatment (EN8 or EN9 may be a better-suited option). If hardening is required heat to a temperature of 880-910°C. Quench in water and temper.

C20 Tempering:

C20 Physical Properties:

Annealed hardness | HBS: 156 max.

Tensile strength,σb/≥ MPa: 400

Yield strength, σ0.2/≥ MPa: 270

Elongation, δ ≥(％): 27.0

Impact, ≥J /Akv: – 

C20 Thermal Properties:

C20 Forging Properties:

C20 Stress Reliving:

C20 Normalizing:

C20 Annealing:

C-20 is commonly supplied bright drawn or as rolled. If annealing is required heat to 880-910°C, furnace