C20 Steel Round Bar, C20 Steel Round Bar Manufacturers, C20 Steel Suppliers, C20 Stockist, C20 Steel Dealers, C20 Steel Distributors, C20 Wholesalers, C20 Steel Traders, C20 Steel Square Distributors, C20 Steel Flat Bar, C20 Steel Companies Near me.
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.
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.
Equivalent grades:
Stocked ProductBS 970:1955British StandardsEuropeanWerksoffSAE/AISILesserGreater
070M20 (070)EN3AEN32080A15C15C20ST52-3(ST5)S235(S23)S275(S27 & S28)1.04021.04011.115110201023LF2 (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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Chemical composition:
The following table shows the chemical composition of C20 steel:
Mechanical Properties:
Tensile strength425 MPa61600 psi
Yield strength360 MPa52200 psi
Shear modulus80.0 GPa11600 ksi
Bulk modulus140 GPa20300 ksi
Elastic modulus190-210 GPa27557-30458 ksi
Poisson’s ratio0.27-0.300.27-0.30
Elongation at break0.150.15
Reduction of area0.40.4
Hardness Brinell121121
Hardness, Knoop140140
Hardness, Rockwell B6868
Hardness, Vickers126126
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.
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.
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: – 
Thermal Properties:
Thermal conductivity51.9 W/mK360 BTU in/hr.ft².°F
Forging Properties:
Stress Reliving:
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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