Production P20 Steel Round Bar Sheet Plate Heat Treatment

P20 Steel Round Bar Sheet Plate Heat Treatment
Stress Relieving

Preheating: Because mold steel 1.2311 steel plate is sold in a pre-hardened
condition, hardening heat treatment is not necessary. After machining and
intermittently during service, the steel must be thermally stress relieved by
heating to 900ºF (482ºC), equalizing and holding for one hour per inch (25.4mm)
of thickness, and cooling in air to ambient temperature.

In those rare circumstances where the AISI steel P20 must be re-hardened, the
steel must first be annealed prior to hardening.

Hardening

Critical Temperature: Ac1: 1405ºF (763ºC)

Preheating of P20 metal: Heat at a rate not exceeding 400ºF per hour (222ºC per
hour) to 1150-1250ºF (621-677ºC) and equalize.

Austenitizing (High Heat)

Heat rapidly from the preheat to 1550ºF (843°C). Soak for 30 minutes for first
inch (25.4mm) of thickness, plus 15 minutes for each additional inch (25.4mm).

Quenching

Pressurized gas, or interrupted oil to 150-125ºF (66-51ºC).
For oil, quench until black, at about 900°F (482°C), then cool in still air
to 150-125°F (66-51°C).

Tempering

1.2311 tool steels are tempered at 482-593°C (900 to 1100°F) for a Rockwell C
hardness of 37 to 28.

Annealing

Annealing for AISI P20 tool steels takes place at 760-788°C (1400 to 1450°F)
and then the steels are cooled slowly in the furnace at a temperature less than
4°C (40°F) per hour.

1.2311 Tool Steel Forging
1.2311 steel plate and round bars materials are forged at 1093°C (2000°F)
down to 899°C (1650°F). Forging below 871°C (1600°F) is not recommended for
these steels P20 material.

Notice
We have our own cutting and processing equipment. Specifications can be cut and
customized according to your requirements.

We are professional special steel stockist and supplier with a high-quality
stand for many years. Please contact us for any request of P20/1.2311 steels
materials. Songshun Steel always with you.

About SongShun Steel
SongShun Steel specialized in steel as a professional special steel supplier,
and also can give you technical advice and support for your business base on
our professional technical knowledge.
Songshun Company Website:
https://songshunsteel.com/
songshun , steel414043401

Minimum Order: 1 kilograms

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