Sulfur content

[metboss]

Gents,

We have carried out lab test for API 5CT L-80 (13%) material and found that sulfur content is 0.012% wheras API 5CT restricts it to 0.010%. Can we accept this? Also, I would like to know the difference between ppm and % mass fraction in pertaining to chemical composition.

Regards

 

[metengr]

No, to me as a customer you have not met the chemical composition requirement for maximum sulfur content by mass percent for API 5CT. PPM is simply a unit of concentration.

 

[metboss]

Any tolerance limit is applicable ?

Regards

 

[metengr]

metboss;
What was the method for chemical analysis? I am referring to either an ASTM Standard or other international standard. There are product analysis methods and reporting accuracy. Please obtain a copy and READ ASTM A 751. Keep in mind there is a line to be drawn when evaluating materials for conformance or nonconformance and if your product ends up on the other side of the line, so be it.

 

[EdStainless]

If you are testing finished product and not the melt then there is a tolerance outside of the specification range that applies.
Look it up.

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