AISI 4340 Steel Round Bar Sheet Plate, JIS SNCM439, DIN 1.6511

4340 steel is nickel-chromium-molybdenum alloy steel. It will get high strength
after the heat treat. And it has good toughness, fatigue resistance, impact
toughness and etc. Its equivalent grade is JIS SNCM439 and DIN 1.6511 / DIN
1.6582. The properties and composition of 4340 steel round bar sheet plate as
below.

It is an alloy structural grade which used by the SAE International(SAE), and
it is chrome-nickel low alloy steel. 4340 steel round bar sheet plate will get
high tensile strength, hardness and toughness after heat treatment. It is used
widely in the transmission components of heavy chemical machinery. Different
sections of each part of the casting which cause the temperature difference
stress and phase transformation stress. If you can’t get their laws and
characteristics, you can’t take the right rational processes. The consequence
is that there is a risk of cracking the casting during the casting or heat
treatment. So the control of chemical composition and the choice of the heat
treatment process for the casting are really important.

1.6511 Steel Application
4340 alloy steel is used to manufacture large and medium-sized plastic molds
that require high strength and toughness. And it is used for making important
quality controlling parts with good toughness, high strength, and large size,
such as heavy machinery and high load shafts, dia of turbine shafts is larger
than 250mm, helicopter rotor shafts, turbojet turbine shafts, blades, high-load
transmission parts, crankshaft fasteners, gears and etc.

After nitriding, it also can be used to make important parts for special
performance requirements. And it will be a great material for high strength and
good plasticity parts after low-temperature tempering or isothermal quenching.

AISI 4340 Steel Round Bar Plate Sheet Supply
We have our own cutting and processing equipment. Specifications can be cut and
customized according to your requirements.

We are a professional special steel stockist and supplier with a high-quality
stand for many years. As a professional 4340 steel supplier, we can supply 4340
steel for your different applications as above. If you need technical guide, we
also can be your strong support, please contacts us for any request for it.
Songshun Steel always with you.

By the way, 4140 steel has similar properties and its cost is lower than 4340
steel. Just go to visit 4140 steel application and properties.

What We Provide
Our main products are round and flat bars for alloy steel, tool steel,
stainless steel, spring steel, bearing steel and etc. In those years we offers
a wide range of high quality steel for engineering machinery, mold tooling,
cutting tools manufacturing industry and etc.songshunsteel414043401

Minimum Order: 1 short tons

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