One more spec search...

[flitetestdummy]

As on my previous question about spec searches I am reverse engineering some parts.
The last part in this batch came back with the chemical analysis results below. Again I am ideally I am looking for a north american spec but the original parts are European and I suspect European specs are at play here too... Any suggestions (guesses??)

Carbon 0.36
Manganese 0.789
Sulfur 0.01
Phosphorous 0.009
Silicon 0.29
Nickel 1.44
Chromium 1.05
Molybdenum 0.056
Copper 0.081
Aluminum 0.029
Iron Balance

part is through hardened to 28-39 HRC

thanks in advance

 

[40818]

Why feel the need to reverse engineer, wouldn't it be better to engineer it yourself?

 

[monkeydog]

Why engineer it yourself if you can get others to give you the technical info you need for free?

 

[TVP]

I am not aware of any steel grade that contains that much Ni and Cr but does not contain any Mo. Grade 4340 according to SAE AMS 6409 would be a suitable North American specification.

 

[dbooker630]

The former SAE 31xx and 32xx standard steel grade are the closest steel grades with similar Mn, Cr and Ni levels.

SAE 3240 is a close fit. This grade calles out Mn=.30/.60, Cr=.90/1.25 and Ni=1.50/2.00.

Another close former standard is SAE X3140, which calls out Mn=.70/.90, Cr=.70/.90 and Ni=1.10/1.40.

 

[CoryPad]

The caveat for dbooker360's info is this: X3140 was last listed as a specification in 1947, while 3240 was last listed in 1941. These are no longer "standard" grades that are available. At this point, you either ask for a custom chemical composition (and buy a heat's worth of it, and then only if you can convince a mill to do it, no easy task), or you change to another material.

Regards,

Cory

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