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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.
Commonly used for general engineering C-20 is suitable for applications such as bolts, shafts, spacers, hubs, base plates, brackets. fixtures and jigs.
|Stocked Product||BS 970:1955||British Standards||European||Werksoff||SAE/AISI||Lesser||Greater|
|070M20 (070)||EN3A EN32||080A15||C15 C20 ST52-3(ST5) S235(S23) S275(S27 & S28)||1.0402 1.0401 1.1151||1020 1023||-||LF2 (LF2)|
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, OHNS, HCHCR, D2, D3, H-11, H-13, CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
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C20, C20 Steel, C20 Chemical composition, C20 Mechanical properties, C20 Equivalent Grades, C20 Steel plate, C20 Steel sheet, C20 Manufacturers, C20 Suppliers, C20 Dealers, C20 Stockist, C20 Distributors, C20 Wholesalers, C20 Traders.
The following table shows the chemical composition of C20 steel:
|Tensile strength||425 MPa||61600 psi|
|Yield strength||360 MPa||52200 psi|
|Shear modulus||80.0 GPa||11600 ksi|
|Bulk modulus||140 GPa||20300 ksi|
|Elastic modulus||190-210 GPa||27557-30458 ksi|
|Elongation at break||0.15||0.15|
|Reduction of area||0.4||0.4|
|Hardness, Rockwell B||68||68|
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.
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.
Annealed hardness | HBS: 156 max.
Tensile strength,σb/≥ MPa: 400
Yield strength, σ0.2/≥ MPa: 270
Elongation, δ ≥(％): 27.0
Impact, ≥J /Akv: –
|Thermal conductivity||51.9 W/mK||360 BTU in/hr.ft².°F|
C-20 is commonly supplied bright drawn or as rolled. If annealing is required heat to 880-910°C, furnace cool.
Surface ‘ripping’ is more evident in EN3 so lubrication is essential. Fairly high surface speeds should be used with moderate feeds. Screw cutting is easy with cutting oil and achieving a fine finish is achieved with slight polishing. Very nice to weld with good flow and strength.
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