AISI 1020 Carbon Steel

AISI 1020 carbon steel is a low carbon steel which has at least 0.17%C and 0.3%Mn. It has a good combination of strength and ductility and can be carburized,but due to its low carbon content, it is difficult to induction hardening or flame hardening. Due to lack of alloying elements, it is not suitable for nitriding.AISI 1020 steel can be easily machined,and can be welded easily using all of the traditional methods.

AISI 1020 Carbon Steel Supply Form & Size

Form of Supply	Size(mm)	Length(mm)
Round bar	Φ6-Φ1,000	3,000-10,000
Square bar	100×100-600×600	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

AISI 1020 Carbon Steel 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

AISI 1020 Carbon Steel Chemical Composition per ASTM A29

GRADE	C	Si	Mn	P	S
1020	0.18-0.23	0.15-0.35	0.30-0.60	≤ 0.040	≤ 0.050

Germany	UK	China	Japan
C22/1.0402	EN3/070M20	20#	S20C

AISI 1020 Carbon Steel 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

AISI 1020 Carbon Steel Forging

Forging temperature:950-1200℃,air cooling after forging.

AISI 1020 Carbon Steel Normalizing

Preheat AISI 1020 steel uniformly and slowly;

Increase the temperature to  890°C – 940°C;

Hold suitable time for the steel to be thoroughly heated,

Cooled in air

AISI 1020 Carbon Steel Annealing

Heated temperature to 870°C – 910°C

Hold suitable time for the steel to be thoroughly heated

Cooled in a furnace.

AISI 1020 Carbon Steel Carburizing

Heat the temperature between 880°C – 920°C

Hold for sufficient time  in a suitable carburizing atmosphere

Followed by refining/hardening and tempering processess

AISI 1020 Carbon Steel Core Refining

Re-heat the temperature at 870°C – 900°C

Hold until the temperature remains constant all over the section

Quench in water, oil or brine.

AISI 1020 Carbon Steel Case Hardening

Re-heat the temperature to 760°C – 780°C after Refining

Holding until the temperature is consistent all over the section

Quenched in water.

AISI 1020 Carbon Steel 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.It is used for simple structural application such as cold headed bolts,and also used in the case hardened condition.