Documentation as an engineering instrument
Most material failures in critical applications are not metallurgical failures. They are documentation and procurement failures — wrong condition, broken traceability, unverified chemistry, inadequate testing.
We address this systematically. Every MTC we handle is reviewed — not forwarded. Every heat number is traced. Every mechanical result is cross-checked against the applicable specification and stated supply condition.
We do not treat Mill Test Certificates as paperwork. We treat them as engineering documents that must be defensible under client audit.
What we review on every MTC
Step by step
A structured approach from requirement receipt to material delivery.
Requirement Clarification
Before sourcing begins, we confirm the technical requirement: grade, UNS designation, supply condition, applicable standards (ASTM / NACE / API), required testing, and form. Ambiguity at this stage costs more than time — it costs compliance.
Structured Sourcing
We source from suppliers whose certification quality, process route, and documentation practices align to the application requirement. We do not treat sourcing as a commodity exercise — mill route and MTC integrity are evaluated as part of the selection process.
MTC Review & Verification
Chemistry is cross-checked against ASTM specification limits. Mechanical properties are verified against the stated supply condition. Heat number traceability is confirmed. Any discrepancy — chemistry at specification edge, missing test data, condition mismatch — is flagged and resolved before the MTC is forwarded.
NDE Coordination (Where Required)
For applications requiring non-destructive examination — ultrasonic testing (UT), liquid penetrant (PT/LPT), magnetic particle (MPI) — we coordinate with approved inspection bodies. NDE scope is aligned to the client's specification, not assumed.
Documentation Package & Delivery
Complete documentation package — MTC, test reports, NDE reports (where applicable), heat number cross-reference — is assembled and delivered with the material. Records are retained and accessible for client audit.
Standards we work with
Familiar territory — not box-checking.
Mill Test Certificate standard. Type 3.1 — Manufacturer's test report, specific heat linked, QA certified. We verify traceability and document integrity.
Material specifications for nickel alloy bars, sheets, and plates. Chemistry and mechanical cross-checks performed against stated grade and condition.
Sour service corrosion resistance standard. Hardness limits, heat treatment condition, and alloy constraints reviewed for 718, duplex, and CRA grades.
Valve and wellhead equipment standards. CRA grade requirements, PSL levels, and documentation expectations addressed as specified.
Pressure equipment and piping specifications. Material compliance cross-checked where ASME Section II material requirements are applicable.
Oilfield standard for materials in H₂S environments. Cross-referenced with NACE MR0175 — same technical requirements, different normative document structure.
Understanding EN 10204 levels
Not all certificates carry the same authority. Understanding the difference matters in critical procurement.
| Type | Issued by | Heat-specific | Suitable for critical |
|---|---|---|---|
| 2.1 — Declaration of Conformance | Manufacturer | No | No |
| 2.2 — Test Report | Manufacturer | No — generic results | No |
| 3.1 — MTC (Inspection Document) | Manufacturer QA | Yes — heat-specific | Yes (reviewed) |
| 3.2 — Third-Party Witness | Manufacturer + TPI | Yes — witnessed | Yes (premium) |
We supply EN 10204 3.1 as standard. Where 3.2 (third-party inspection witness) is required, we coordinate accordingly. We do not supply 2.1 or 2.2 for critical applications.
Discuss your compliance requirement
Tell us the standard, application, and testing scope. We'll confirm our ability to meet it — honestly.
Review our product families
See grade-specific compliance notes, applicable standards, and available supply conditions for each alloy family.