What is 40CrMo4V ? 4

[Flesh]

Can someone please decifer this designation for me in terms of a USA grade? I have a guess that it is a variant of SAE 4140 low-alloy steel (i.e. what is the "V" designating).

 

[entx]

It's vanadium.

I wish I could cross reference the spec for you but I can't. Have you searched on Matweb? That usually has equivalent specs listed for the materials...

 

[CoryPad]

The designation is 40CrMoV4-6, which is shown in EN 10269 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties.

A similar alloy is Grade B16 according to ASTM A 193/A 193M Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[Flesh]

Matweb did not have the designation I listed.

CoryPad
Are you saying that 40CrMo4V does not exist (this is what was listed on my part drawing). A typo in other words?

 

[CoryPad]

I have not seen 40CrMo4V standardized anywhere. Usually the V precedes the number (like my example above, or 51CrV4 in EN 10083-1). I have heard of people placing a V on the end of materials ordered to DIN standards, and the V stood for vergutet, which means aged/tempered in German.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[unclesyd]

I have a reference that says that 40CrMo4V is AISI 4140 and the V without suffix stands for Quench and Tempered.

42CrMo4V is listed as 4140/4142 QT.

Both these Specs have the W-Nr 1.7225

 

[DaveScott]

There is a direct JIS standard: SNB16(see link).

Standard comparison:

http://misumiusa.com/CategoryImages/Metric_2006_pdf/METRIC1863-1864.pdf

SNB16 spec:

http://www.metalsamsung.com/bolting_material_properties.htm

Also see ASTM comparison for SNB16:

http://www.diekson.com/3.htm

= ASTM A193-B16