Quality & Documentation

Industrial buyers don't trust adjectives — they trust documents. This page explains exactly which paperwork accompanies a Tongke titanium order, what each document proves, and how to verify it on your side.

The Document Set Per Shipment

What Ships With Your Order
Document	Proves
Mill Test Certificate (MTC)	chemical composition + mechanical results per heat/lot, EN 10204 3.1 style
Packing list	piece-level lot mapping, weights, bundle counts
Certificate of Origin / commercial docs	customs paperwork chain
NDT report (where ordered)	hydrostatic / UT / eddy-current result record
Third-party inspection report (where arranged)	independent pre-shipment verification

MTC Field by Field

A Titanium MTC Should Show
Field	Note
Standard + revision	e.g. ASTM B265 Gr2 — not just 'B265'
Heat & lot number	ties to labels on every bundle
Chemistry	C, N, O, Fe + alloying for Gr5/9/12/23
Mechanical	tensile, yield, elongation, hardness where spec'd
Test method + condition	annealed/STA etc., which specimen
Mill signature	producer declaration, not trader paraphrase

Traceability Chain

Heat number (melt) → lot (rolling/drawing batch) &rarr> packing list line → invoice. Every delivered piece should tie back to an MTC line without a phone call. Where your class society or EPC paperwork demands witness testing, third-party inspection (SGS/BV family) is coordinated at the production base before dispatch.

What the documents do NOT say: our partner mills hold certifications (e.g. ISO 9001 at the Baoji production base) — those certificates belong to the producer, and where we show examples they are marked as production-partner documents. We are the sourcing, QC coordination and export side of the transaction. We'll never present someone else's certificate as ours.

Verify on Arrival (buyer's QC checklist)

☐ measure thickness/OD against MTC declared values (callipers/micrometer)
☐ check heat/lot numbers on labels vs MTC
☐ confirm surface & edge condition matches PO terms
☐ weigh a bundle vs theoretical (tube guide has the formula)
☐ retain one piece per lot for your own incoming test

How We Handle Quality Claims

Documented discrepancy → we open a mill case against the MTC line number with photos and measurements; resolution scope is agreed before replacement or credit. TBC: formal claim-window policy is confirmed per contract.

Dimensional inspection at the production network