440C DFAR 1

[dgallup]

I've seen numerous online listing for 440C stainless steel products such as ball bearings as "440 DFAR" but no explanation as to what the DFAR stands for. I know that it is NOT referring to the Defense Acquisition Regulations System. I also know that this steel is air melted, not vacuum melted. I'm pretty sure it's indicating something to do with the production process but my Google Fu must be weak, I can't find an explanation.

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[btrueblood]

pretty sure it DOES refer to defense applications, i.e. a requirement for, or preference for, "domestically sourced" materials for certain critical US defense projects.

https://www.vincentmetals.com/DFARS_Specialty_Metals_Clause_What_and_Why.html

 

[metengr]

It refers to Defense Federal Acquisition Regulation Supplement clause for special metals. Look it up.

 

[dgallup]

That is a meaning of DFAR but not how it's being used by these suppliers. They are contrasting DFAR with VIM/VAR production methods but they never define DFAR.

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[EdStainless]

I would stay well away from people using that description.
This is what happens when people cut and paste others web sites.
I have never seen DFAR used related to melting or any other alloy processing.


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P.E. Metallurgy, Plymouth Tube

 

[dgallup]

Interesting, maybe the people writing web pages are just clueless.

Somehow it's filtered into our purchasing group and they have started referring to "the DFAR material" like it's a manufacturing process. I try to keep them on the straight and narrow but it's like herding cats.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[btrueblood]

I was going to say what Ed said, but he said it better and he's a metals guy...so I gave him a star.

 

maybe the people writing web pages are just clueless.

Fixed it for you ;-)

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

 

[MagBen]

DFARS does tell something: produced in the USA or qualifying country to satisfy Defense.
It has nothing to do with melting or manufacturing process. Driven by applications, 440C can be melted with Arc+AOD+concast, Arc+AOD+static, Arc+VAR, ARc+ESR, VIM+VAR, and even Air Induct/VIM+gas atomization.