What Mipra Steel Does
- Describes each enquiry and lot by its recognised designation and UNS number where one exists, not by a loose trade name.
- Asks for the grade evidence available for the material before an enquiry moves forward.
- Reviews the documents and readings supplied against the published composition for the grade on this site.
- Does not describe material by a designation that the available evidence does not support, and says so where a trade name cannot be matched to a published designation.
What We Ask Sellers to Provide
- Grade, or best guess if unconfirmed, with form, approximate weight and location.
- Photographs of the material, including any markings, stencils or heat numbers.
- Mill test certificates, where the material can be traced to them. See reading a mill certificate.
- Any XRF, OES or PMI reading reports, or laboratory analyses, the seller already holds.
- The source or original application, which narrows the likely grades.
The PMI inspection checklist sets out what a useful identification record contains.
Independent Testing and Inspection
Where the chemistry has to be confirmed beyond the documents supplied, analysis or inspection is carried out by an independent laboratory or inspection agency, as agreed between buyer and seller. This matters most where light elements or carbon decide the grade, because handheld XRF cannot measure them reliably. See XRF, OES or lab.
General Industry Practice
The following describes how identification is commonly handled in the alloy scrap trade. It is general guidance, not a description of Mipra Steel’s own equipment.
- Identification. Heavy pieces are usually checked individually; turnings and clippings are sampled, often with a laboratory composite.
- Segregation. Grades are kept apart, and nickel alloys away from stainless, carbon steel and copper alloys, to prevent tramp-element contamination.
- Standards. Material verification commonly follows API RP 578 and ASTM E1476, with the ASTM test methods for XRF, spark OES and laboratory analysis of nickel alloys. Where material still carries a product marking or mill certificate, the specification and heat number are checked against the reading. See how standards help prove a lot.
- Export compliance. Export lots typically carry the documents in our export guide, including radiation checks and destination-specific inspections such as India’s PSIC.