Project Description
AISI 1020 steel is a low hardenability and low tensile carbon steel which has a nominal 0.22%C and 0.55%Mn. It has excellent weldability,good machinability ,and high ductility with Brinell hardness of 119 – 235 and tensile strength of 410-790 MPa. It is normally used in turned and polished or cold drawn condition. Due to its low carbon content, it is resistant to induction hardening or flame hardening. Due to lack of alloying elements, it will not respond to nitriding. However, carburization is possible in order to obtain case hardness more than Rc65 for smaller sections that reduces with an increase in section size. Core strength will remain as it has been supplied for all the sections. Alternatively, carbon nitriding can be performed, offering certain benefits over standard carburizing.
1.AISI 1020 steel Supply Form & Size &Tolerance
| Form of Supply | Size(mm) | Length(mm) |
| Round bar | Φ6-Φ1000 | 3000-10000 |
| Square bar | 100 x 100-600x600 | 3000-6000 |
Flat bar/Blcoks | Thickness :120-800 | 2000-6000 |
| Width:120-1500 |
| Surface Finish | Black-Forged | Black-Rolled | Rough Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0，+5mm) | (0，+1mm) | (0，+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
2.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 |
3.Physical Property
Modulus of elasticity [10^3x N/mm2]: 210
Density [g/cm^3]: 7.70
Thermal conductivity [W/m.K]: 51.9
Electric resistivity [Ohm mm^2/m]: 0.11
Specific heat capacity[J/g.K]: 0.46
4. AISI 1020 steel Mechanical Property
| Diameter mm | Tensile Strength Mpa | Yield Strength Mpa | Elongation % | Reduction of area % | Condition |
| ≤ 16 | 500 - 650 | ≥ 340 | ≥20 | ≥50 | Quenched and tempered |
| >16 – 40 | 470 - 620 | ≥290 | ≥22 | ≥50 | |
| ≤ 16 | ≥430 | ≥240 | ≥24 | Normalised |
|
| >16 – 100 | ≥410 | ≥3210 | ≥25 |
5.AISI 1020 steel Forging
Forging temperature:950-1200℃,air cooling after forging.
6.AISI 1020 Heat Treatment
Normalising:880 – 920°C,air cooling
Soft annealing:680 – 710°C,furnace cooling
Hardening:860 – 900°C,water quench
Tempering:550 – 660°C,air cooling
7.Application
AISI 1020 steel can be largely utilized in all industrial sectors in order to enhance weldability or machinability properties. It is used in a variety of applications due to its cold drawn or turned and polished finish property.
AISI 1020 steel is also used in case hardened condition,and it finds use in the following components:
- axles
- general engineering parts and components
- machinery parts
- shafts
- camshafts
- gudgon pins
- ratchets
- light duty gears
- worm gears
- spindles
- cold headed bolts
- automotive components
