AISI 1020 | C20 STEEL |1.0402 STEEL | SAE 1020

AISI 1020 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.

Available Types & Range

AISI 1020 steel Supply Form & Size

Form of Supply Size(mm) Length(mm)
Round bar Φ20-Φ650 Standard or As your request
Square bar 25 x 25 – 450 x 450 Standard or As your request
Plate/Sheet Thickness :6 – 300
Width:80-1,250		 Standard or As your request
Flat bar/Blcoks Thickness :10 – 300
Width:120-25 – 500		 Standard or As your request

C 20 – BRIGHT ROUNDS

size – 6 mm to 80 mm Dia

Brand – JSW, VSP, ASP, SAIL, SLR

C 20 – ROLLED

Size – 16 mm to 200 mm Dia

Brand – JSW, VSP, ASP, SAIL, SLR

C 20 – FORGED ROUND

Size – 140 mm to 670 mm Dia

Brand – Kolkatta& Punjab Main Make

C 20 – FORGED FLAT

150 x 65 to 650 x 400 Flat

Brand – Kolkatta& Punjab Main Make

C 20 – STEP FORGED

(As per your Requirement)

Forged Condition or Machine Proof Condition

Brand – Kolkatta & Punjab – Main Make

C 20 – RING FORGED

(As per your Requirement)
Forged Condition Or Machine Proof Condition

Brand – Kolkatta & Punjab Main Make

Chemical Composition & Technical Specification -C 20

Range C Si Mn P S Mo Cr Ni
min. 0.17 – 0.30 – – – – –
max. 0.23 ≤ 0.4 0.60 ≤ 0.04 ≤ 0.05 – – –
Germany UK China Japan
C22/1.0402 EN3/070M20 20# S20C

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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

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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 steel Forging

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

Normalizing

  1. Preheat AISI 1020 steel uniformly and slowly;
  2. Increase the temperature to  890°C – 940°C;
  3. Hold suitable time for the steel to be thoroughly heated,
  4. Cooled in air

Annealing

  1. Heated temperature to 870°C – 910°C
  2. Hold suitable time for the steel to be thoroughly heated
  3. Cooled in a furnace.

Carburizing

  1. Heat the temperature between 880°C – 920°C
  2. Hold for sufficient time  in a suitable carburizing atmosphere
  3. Followed by refining/hardening and tempering processess

Core Refining

  1. Re-heat the temperature at 870°C – 900°C
  2. Hold until the temperature remains constant all over the section
  3. Quench in water, oil or brine.

Case Hardening

  1. Re-heat the temperature to 760°C – 780°C after Refining
  2. Holding until the temperature is consistent all over the section
  3. Quenched in water.

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 properties is used for simple structural application such as cold headed bolts,and also used in the case hardened condition.