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ASTM standard for 4140 and 1018

ASTM standard for 4140 and 1018

ASTM standard for 4140 and 1018

which ASTM standard shows the mechanical and physical properties for 4140 and 1018
I am looking for SMYS info but can't find.

RE: ASTM standard for 4140 and 1018

The steels you mention have a wide range of SY due to the dependence on thermal or thermomechanical treatments.
There are ASTM specifications where you can find a general list of low alloy steels such as A322, where only the compositions are shown, but if you need a SMYS (minimum specified) you need a code or specification that specifies a minimum required, maybe the use or More information on this could be useful.

In the following links you can find properties for both steels in different heat treatment conditions and when you open each one, the Key Words section offers you the main specifications that fit the material in that condition, I hope it will be useful.


If you have more information, we are waiting for you here.

By the way, a question as open as that seems schoolwork, is it?

RE: ASTM standard for 4140 and 1018

i am trying to create a calc sheet for parts made out of these materials and i need the YS. i can get it directly from the MTR that come from he supplier or look it up online. i also had a reference book listing some properties for bars based on being hot rolled or cold drawn.

but i just never found the ASTM standard that spells out this info directly like every other materials i am using

RE: ASTM standard for 4140 and 1018

basically i am looking for the same info you linked from matweb but in the ASTM standard

RE: ASTM standard for 4140 and 1018

What kind of parts are they?
springs, plates, fasteners, nuts, tube?

RE: ASTM standard for 4140 and 1018

These are AISI (or SAE) steels. The ASM Handbook has typical properties for various heat treatment conditions.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: ASTM standard for 4140 and 1018

What you need is the spec that they are being purchased to and then look up the minimum allowed properties.
Different specs will have different HT and strength requirements.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: ASTM standard for 4140 and 1018

If fatigue is involved. the transverse properties may be a good bit lower than the longitudinal properties.

RE: ASTM standard for 4140 and 1018

The CMTR from your supplier should have the standard that they made the parts to.

RE: ASTM standard for 4140 and 1018

You need to determine the product form for ASTM materials specifications to be of use.

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