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European material 45CrMoV4 3

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MalcolmA

Mechanical
Sep 22, 2003
40
I have a European material designated as 45CrMoV4. I am trying to find out what it is so that I can get an equivalent AISI material. Does anyone know where I can find a reference that would tell me the chemistry of European materials and their AISI equivalents.

 
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I am not aware of an exact equivalent grade in any ASTM or SAE standards. There are some grades that are close, but it will depend on what the end use is whether or not they are appropriate. Any more information you can provide such as temperatures, environment, loading conditions, etc.?
 
From the designation, I'd wager it is some kind of modified 4145 with Vanadium additions, but that would be just a guess.

TVP has said it, though. There probably isn't any direct equivalent. Depending on the end-use, though, there are probably AISI steels that would be a suitable substitute.

rp
 
This material is for a bolt that is internal to a turbine that sees temperatures of 670 deg F. The shop that is working on the turbine is ordering a replacement bolt made of 4140 material and I just wanted to make sure that 4140 would be a suitable replacement.
 
Externally threaded fasteners intended for elevated temperature use should be ordered to ASTM A 193/A 193M, not just a chemical composition. 4140 is one of the grades that meets the requirements for Grade B7 and B7M from A 193/A 193M. However, it is not equivalent to the European steel grade-- Grade B16 (Mo specified to 0.50-0.65, V = 0.25-0.35) is the equivalent. Since the end use temperature is only ~ 350 C, Grade B7 (4140) may be sufficient, but I would not use it, due to its inferior stress relaxation resistance when compared to grades that contain higher amounts of Mo & V.
 
I have the details for 51CrMoV4 which is as follows.

C-0.48-0.56%, Si 0.15-0.5%, Mn 0.7-1.0%, Cr 0.9-1.2%, Mo 0.15-.0.25%, Va 0.08-0.15%.

Tensile strength 1370-1670N/mm2, Yield strength (0.2% offset) 1180N/mm2, Elongation(2" gage length) 6%, Hardness >54HRC

In 45CrMoV4 I think the only variant will be carbon which will be 0.43-0.48%,all other elements contents being the same.

Hope it helps.

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Thanks to all for your posts. We are going with B16 material instead of 4140. It is more consist with the 45CrMoV4 material.
 
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