Mild Steel Round Bar S20C
Mild Steel Round Bar S20C is a low carbon steel grade commonly used in the manufacture of machinery parts. It has good weldability and can be machined easily. It is commonly used in the production of automobile parts, shafts, gears, and general machinery components. It is known for its good tensile strength and ductility. The S20C indicates the carbon content of the steel is around 0.20%. Mild Steel Round Bar S20C is available in a range of sizes and shapes to suit various manufacturing requirements.
The following are the main specifications and features of the product:
1. Diameter range: 5mm-200mm.
2. Length range: 3m-12m.
3. Surface treatment: black, galvanized, spray paint, etc.
4. Chemical composition: Carbon content is 0.18%-0.23%, silicon content is 0.15%-0.35%, manganese content is 0.3%-0.6%, phosphorus content does not exceed 0.035%, sulfur content does not exceed 0.035%.
5. The tensile strength is 440-580MPa and the yield strength is 245MPa.
1.AISI 1020 steel Supply Form & Size
| Form of Supply | Size(mm) | Length(mm) |
| Round bar | Φ6-Φ1,000 | 3,000-10,000 |
| Square bar | 100x100-600x600 | 3,000-6,000 |
| Plate/Sheet | Thickness :20-400 Width:80-1,000 |
2,000-6,000 |
| Flat bar/Blcoks | Thickness :120-800 Width:120-1,500 |
2,000-6,000 |
2.Surface Finish&Tolerance
| Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0，+5mm) | (0，+1mm) | (0，+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
3.Chemical Composition&Related Specifications
| Grade | C | Si | Mn | P | S |
| 1020 | 0.17-0.23 | ≤ 0.4 | 0.30-0.60 | ≤ 0.04 | ≤ 0.05 |
| Germany | UK | China | Japan |
| C22/1.0402 | EN3/070M20 | 20# | S20C |
4.Mechanical Property
| properties | Metric | Imperial |
| Tensile strength | 420 MPa | 60900 psi |
| Yield strength | 350 MPa | 50800 psi |
| Modulus of elasticity | 205 GPa | 29700 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Poisson’s ratio | 0.29 | 0.29 |
| Elongation at break (in 50 mm) | 0.15 | 0.15 |
| Hardness, Brinell | 121 | 121 |
| Hardness, Knoop (converted from Brinell hardness) | 140 | 140 |
| Hardness, Rockwell B (converted from Brinell hardness) | 68 | 68 |
| Hardness, Vickers (converted from Brinell hardness) | 126 | 126 |
| Machinability (based on AISI 1212 steel. as 100 machinability) | 65 | 65 |
5.AISI 1020 steel Forging
Forging temperature:950-1200℃,air cooling after forging.
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