AISI 1018 Low Carbon Steel Tube

AISI 1018 LOW CARBON STEEL TUBE

AISI 1018 low carbon steel tube has excellent weldability and produces a uniform and harder case and it is considered as the best steel for carburized parts. It offers a good balance of toughness, strength and ductility. Provided with higher mechanical properties, AISI 1018 hot rolled steel tube also includes improved machining characteristics and Brinell hardness.

Specific manufacturing controls are used for surface preparation, chemical composition, rolling and heating processes. All these processes develop a supreme quality product that are suited to

fabrication processes such as welding, forging, drilling, machining, cold drawing and heat treating.

Chemical composition

Mechanical properties

Heat treatment

The heat treatment for AISI 1018 low carbon steel tube consists of the following processes:

Normalizing

AISI 1018 low carbon steel tube should be heated at 890℃-940℃ and then cooled in still air.

Forging

This process requires heating between 1150℃-1280℃ and it is held until the temperature becomes constant.

900℃ is the minimum temperature required for the forging process.

The steel is then cooled in air after this process.

Tempering

AISI 1018 low carbon steel tube is tempered at between 150℃-200℃ for improvement of case toughness. This process has little or no effect on hardness.

The occurrence of grinding cracks is reduced when it is tempered at the above mentioned temperature.

Annealing

The AISI 1018 low carbon steel tube is heated at 870°C – 910°C and allowed to cool in a furnace.

Stress Relieving

500°C – 700°C is required to relieve stress in AISI 1018 low carbon steel tube that is later cooled down in still air.

Applications of AISI 1018 low carbon steel tube

• It is used in bending, crimping and swaging processes.

• Carburized parts that include worms, gears, pins, dowels, non-critical components of tool and die sets, tool holders, pinions, machine parts, ratchets, dowels and chain pins use AISI 1018 low carbon steel tube.

• It is widely used for fixtures, mounting plates and spacers.

• It is suitably used in applications that do not need high strength of alloy steels and high carbon.

• It provides high surface hardness and a soft core to parts that include worms, dogs, pins, liners, machinery parts, special bolts, ratchets, chain pins, oil tool slips, tie rods, anchor pins, studs etc.

• It is used to improve drilling, machining, threading and punching processes.

• It is used to prevent cracking in severe bends.

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