Positive Material Identification (PMI / OES)
Engineering definition, metallurgical mechanisms, standard testing specifications, and manufacturing guidelines for closed-die forgings up to 50 kg.
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The on-site or laboratory chemical spectroscopic verification of alloy elements in incoming billets and finished forgings using XRF or Optical Emission Spectrometry (OES).
Technical Explanation & Metallurgical Principles
PMI testing is a mandatory non-destructive quality gate that ensures raw material identity is preserved throughout manufacturing. Optical Emission Spectrometry (OES) measures both metallic elements (Cr, Ni, Mo) and non-metallics like Carbon, Phosphorus, and Sulfur, guaranteeing that material mix-ups are physically impossible.
Key Engineering Specifications & Parameters
| Technical Parameter / Metric | Engineering Benchmark / Value |
|---|---|
| Spectrometer Type | Optical Emission Spectrometer (OES) with Spark Argon Arc |
| Elements Verified | C, Mn, Si, P, S, Cr, Ni, Mo, V, Nb, Ti, Cu, N |
Application at Jayesh Forge (Rajkot Plant)
100% of raw billet heats and finished critical stainless/alloy forgings at Jayesh Forge undergo OES/PMI verification at our Rajkot quality lab.
Related Materials, Standards & Products
Related Metallurgical & Testing Terms
Mill Test Certificate (EN 10204 3.1 MTC)
An authenticated legal inspection document validated by the manufacturer's authorized quality inspector independent of the manufacturing hierarchy.
Heat Number Traceability
The permanent alphanumeric identification stamped onto each forging linking it directly to the exact ladle melting furnace batch and chemical analysis records.
Questions Regarding Positive Material Identification (PMI / OES)
Handheld XRF cannot measure light elements like Carbon, Phosphorus, or Sulfur; Spark OES accurately measures Carbon down to 0.005%, verifying 304L and 316L low-carbon compliance.
Request a Forging Quote with Positive Material Identification (PMI / OES) Compliance
Our Rajkot metallurgy desk is ready to review your technical drawings, testing protocols, and delivery schedules for custom closed-die forgings strictly up to 50 kg.