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Use or grade of this steel?

Use or grade of this steel?

Use or grade of this steel?

Hi everybody.
Have you used this steel or do you know which grade is or typical use?
Yes, It's look like AISI Serie 61xx, Cr-V Steel (like the legend in some handtool), but i'm not sure about the Moly content in this serie.
C = 0.22, Mn = 1.11, Si = 0.29, P = 0.011, S = 0.003, Cr = 0.88, V = 0.13, Cu = 0.16 AND Mo = 0.52

Thanks a lot.

RE: Use or grade of this steel?

could it be 1Cr-0.5Mo (ASTM A387 grade 12) with too much carbon (>0.17) and manganese (>0.73) ?

RE: Use or grade of this steel?

This would be used in relatively high temp applications from 800F to 1000F.

RE: Use or grade of this steel?

Carbon is too high to be one of the Cr-Mo steels. Also, V is high enough to consider it deliberately added, and that also doesn't mesh with any Cr-Mo steels that are around 1 or 1¼% Cr.
What is the product form?

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

RE: Use or grade of this steel?

Hi Ironic Metallurgist

The original shape of the product is unknown, I only have fragments of damaged and irregular geometry that was found in a very unusual location and in the vicinity there are from heavy machinery, pipes and various irons to hand tools.

in principle I also considered it to be some degree of a Cr-Mo steel, however I noticed that the V is high and looks more like a Cr-V steel, close to the AISI 6120, although Mo is not considered in this grade.

RE: Use or grade of this steel?

Clearly not pressure equipment so it is some AISI grade or foreign equivalent. Are you just trying to reverse engineer a part or identify foreign material? This alloy could very well have been used for hand tools.

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

RE: Use or grade of this steel?

Yes, reverse engineer to a foreign material for positive material identification (PMI).

Yes, hand tool is my first suspicion, but I would like to back this conjecture with technical information. Specification sheets, literature, analysis of chemical composition that you have made to popular hand tools or perhaps not a hand tool, but a component that has that composition.

RE: Use or grade of this steel?

You may perform PMI with a reputed manufacturers' instrument,e.g. Niton or Oxford Alloys or other established manufacturers' product. The data base of the PMI equipment would reveal the nearest North American or overseas grade.

The other option according to be would be resource sites e.g.: matweb: http://www.matweb.com/search/DataSheet.aspx?MatGUI....

AISI steels comes in lot of forms and shapes, many of them are not used in BPV codes, hence there are possibilities of getting steels with Higher "C Content" as well as with odd/uncommon compositions. If the component is a tool steel "C" may be high as compared to ASME/ASTM grades.


Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist

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