Hardenability for Coupling 3-1/2" L80 13 Cr. material
Hardenability for Coupling 3-1/2" L80 13 Cr. material
(OP)
Please can somebody tell me about hardenability requirement as per API 5CT for Coupling 3-1/2" L-80 13Cr material.
We have received hardness report after tempering, but hardenabilty hardness values for as quenched condition are not mentioned in MTC. As per my interpretation with code, hardenabilty test to be carried out.(Reference API 5CT, clause 7.10.2)
We have raised discrepancy about this and conveyed to manufactuer.
But manufacturer clarifies that hardeneability requirement is not mandatory.
Regards
We have received hardness report after tempering, but hardenabilty hardness values for as quenched condition are not mentioned in MTC. As per my interpretation with code, hardenabilty test to be carried out.(Reference API 5CT, clause 7.10.2)
We have raised discrepancy about this and conveyed to manufactuer.
But manufacturer clarifies that hardeneability requirement is not mandatory.
Regards





RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material
L80 13Cr has very high hardenability and will absolutely pass the (original) 90% martenstite requirement.
RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material
Kindly note that our coupling falls under PSL-2 & advise me on hardenability requirement for PSL-2 product.
RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material
It is not required that this test be performed (or reported) on a per heat or per lot basis for L-80 13Cr. This is probably what your manufacturer meant when he said it was not mandatory. It is mandatory that they perform the test and meet the requirement. It is not mandatory to report the results with the certification package. In addtion, a qualification test performed 10 years ago (or more) is still valid as long as the steel chemistry spedification is the same and the austenitize/quench parameters are the same.
If pressed, the manufacturer should show you the results of this qualification. Since it is a part of their process control procedure, however, they may tell you that is only available for on-site review, that is, they probably will not send you a copy, you would have to go to their plant to see it (during a quality audit, for example). Incidentally, for 13Cr material, this is a slam-dunk reqruirement.
rp
RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material