Steel grade?
Steel grade?
(OP)
I have a bolt material with this chemistry:
C - 0.40
Mn - 1.13
S - 0.005
P - 0.010
Si - 0.26
Mo - 0.22
Cu - 0.17
Al - <0.005
V - <0.005
Nb - <0.005
I couldn't really match it up with a US grade (possibly an SAE 40XX grade). Any idea what this could be? Foreign grade?
C - 0.40
Mn - 1.13
S - 0.005
P - 0.010
Si - 0.26
Mo - 0.22
Cu - 0.17
Al - <0.005
V - <0.005
Nb - <0.005
I couldn't really match it up with a US grade (possibly an SAE 40XX grade). Any idea what this could be? Foreign grade?





RE: Steel grade?
RE: Steel grade?
RE: Steel grade?
Any markings at all?
Was the anlaysis with a portable unit or a real lab chemistry? Where is the Cr?
= = = = = = = = = = = = = = = = = = = =
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RE: Steel grade?
I don't remember what the head markings are, but this is suppose to be Gr 8. Measured core hardness is 35HRC.
Analysis done with ICP-OES, in a lab.
It is not alloyed with Cr or Ni, but here are the values:
Cr - 0.07
Ni - 0.08
RE: Steel grade?
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Steel grade?
RE: Steel grade?
It is a low-cost alternative to 4140 steel, the hardenability is slightly lower than 4140 but the chemistry is enough to permit its use in larger diameter fasteners where straight 4037 will not sufficiently harden.
RE: Steel grade?