But They Are There!!! ( Cr, Cu, NI, V, Ti in Carbon steel) 7

[Tmoose]

A report on line has a slide that has these comments -
[ul]
[li]"Residual Elements found in Carbon Steel (i.e. Cr, Cu, NI, V, Ti)[/li]
[li]MTR’s Normally do not test for these Elements and should not be in the Carbon Steel ![/li]
[li]But They Are There!!! "[/li]
[/ul]

I realize many ASTM specs for carbon ( non alloyed )contain limited elements in the recipe, but is is accurate to say any other elements are forbidden ?

 

[EdStainless]

And what? It looks like nice steel to me.

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P.E. Metallurgy, Plymouth Tube

 

[dbooker630]

I agree with EdStainless, it is a good heat of aluminum-killed 1045. Copper and Ni-Cr-Mo are typical for what I have seen. It certainly could work in automotive.

 

[Mr168]

Safe to say if it is not prohibited by the applicable specification, it is fair game. I have seen, on more than one occasion, an OEM commit to a specific material, only to find out later that an "off the shelf" variety will not come anywhere close to the desired mechanicals. The end result is the mill dumping whatever constituent is "unlisted" in there to get the specified properties. Same goes for heat treatment (e.g. addition of Q&T to hit CVN requirements). I've got some structural steel coupons sitting under my desk that would probably hold up pretty well in steam service...

 

[bobjustbob]

It looks like it meets all the requirements for ASTM A29 to me. The Cr, Ni, Mo, V and Cu are all right where I would expect. A bit of Al was added for deox.

The only note I have is you are comparing it to an outdated standard. ASTM A29-05 has been replaced by A29-15.

 

[EdStainless]

And it is fine grain by chem (grain refiners added).
Not only does it meet spec but they give you enough info to assure you that they aren't trying to hide anything.

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P.E. Metallurgy, Plymouth Tube

 

[moltenmetal]

Sorry, but the little addage, "If you don't ask for it, you don't get it" is proven FALSE by this very thread!

Steel users aren't asking for these tramp elements, but they sure are getting them!

Yeah, I know you could ask for a low tramp element spec and then expect to get that, but a better way to put this might be that "You get what you test for- and then, only if you pay for it."

 

[mrfailure]

As a material testing lab that supplies certs, pricing is always for a standard set of elements unless otherwise requested. In the case of carbon/alloy steels, 10 standard elements are provided plus any additional elements that are in the spec. Much easier for us and our competitors to start with a base than try to test for only the elements in the spec.

 

moltenmetal,
No, the thing we're asking for is less tramp elements (and proof thereof).

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