C20
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:
- bolts
- shafts
- spacers
- hubs
- base plates
- brackets
C20 Equivalent Grades:
| Stocked Product
|
BS 970:1955 |
British Standards |
European |
Werkstoff |
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) |
C20 Chemical Composition:
| Element |
C |
Mn |
Si |
S |
P |
| Content (%) |
0.17-0.23 |
0.30-0.60 |
0.10-0.40 |
≤0.045 |
≤0.045 |
Mechanical Properties:
| Property |
Metric |
Imperial |
| 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 |
| Poisson’s Ratio |
0.27-0.30 |
0.27-0.30 |
Physical Properties:
| Property |
Value |
| Annealed Hardness |
HBS: 156 max. |
| Tensile Strength (σb/≥) |
400 MPa |
| Yield Strength (σ0.2/≥) |
270 MPa |
| Elongation (δ ≥) |
27.0 % |
| Impact (≥J/Akv) |
– |
Thermal Properties:
| Property |
Metric |
Imperial |
| Thermal Conductivity |
51.9 W/m·K |
360 BTU in/hr·ft²·°F |