hot forged steel price per kg SAE4320, forged steel bar, Small MOQ
AISI 4320 is used in the manufacturing of forged gears and pinions
and other heavy-duty machinery components.
1. Round bar:
Surface condition Diameter Length
Black 80-1200mm Random
Turned 120-800mm Random
2. Flat Bar:
Surface condition Height Width Length
Black 50-600mm 1600mm max Random
Turned 80-600mm 1200mm max Random
Annealing: AISI 4320 might be processed through case hardening and subsequent
heat treatment operations without the need for annealing. Its
microstructure as forged will be suitable for such treatments, but
in the case of small sections where a very fine structure may
result from forging, a normalizing treatment would be recommended
prior to further heat treatment.
Normalizing: AISI 4320 is normalized at a temperature of around 1700ºF (925ºC.)
Air cooling follows heat treatment. It should be noted that
experience alone will determine the normalizing temperature for a
specific part following given forging conditions.
Hardening: AISI 4320 should be austenitized following carburizing at a
temperature in the region of 1525 -1550ºF (830 – 845ºC) followed by
Tempering: The alloy will be tempered at a temperature that will most
probably be based on past experience, according to required
Machinability: The alloy is readily machinable in the forged – depending upon
section size – condition or following normalizing. Finish machining
following harden and temper is applicable.
Weldability: AISI 4320 is readily weldable by all normal methods. The alloy
should however be welded in the as-forged or normalized conditions
only, and not following harden and temper.
Dimension Tolerance Standard: DIN 7527.
Ultrasonic Test: SEP 1921 3C/c or specific FBH eq.
Mill′s test certificate:
EN 10204/3.1 with all relevant data reg. chem. composition, mech.
properties and results of testing.