AISI 1020 | 1.0402| 070M20

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
Flat bar/Blcoks	Width:120-1500	2000-6000

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	Quenched and tempered
≤ 16	≥430	≥240	≥24		Normalised
>16 – 100	≥410	≥3210	≥25		Normalised

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: