S20C Cold Drawn Steel Bar

S20C cold drawn steel bar is a type of carbon steel bar that is commonly used for machining purposes. It has a low carbon content of 0.18-0.23% and medium tensile strength of 570-700 MPa. This type of steel bar is excellent for making parts such as gears, bolts, and screws. The cold drawing process used to make this type of steel bar enhances its overall ductility, toughness, and surface finish. S20C cold drawn steel bar is versatile and offers excellent value for money.

Here are a few product specifications for the S20C Cold Drawn Steel Bar:

1. Diameter: from 5mm to 80mm.

2. Material: S20C cold-drawn steel, in line with the national standard GB/T 699-1999 requirements.

3. Surface treatment: Usually the surface is treated with black phosphating, and other surface treatment methods such as passivation and galvanizing can also be carried out according to customer requirements.

4. Length: the general length is 3-6 meters, can be cut or crimped according to customer requirements.

5. Strength: medium strength, difficult to quench.

Chemical Composition&Related Specifications

1.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

2.Annealing

Heated temperature to 870°C – 910°C

Hold suitable time for the steel to be thoroughly heated

Cooled in a furnace.

3.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

4.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.

5.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.

6.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.

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