Conflict Minerals (CMRT)
Why brass falls outside the 3TG conflict-minerals scope — and the CMRT and scope-determination documentation we provide.
At a glance
What is a CMRT?
The Conflict Minerals Reporting Template (CMRT) is a free, standardised form from the Responsible Minerals Initiative (RMI). It is used to report whether products contain tin, tantalum, tungsten or gold (3TG) and, if so, the smelters and refiners and the country of origin — with the focus on minerals sourced from the Democratic Republic of the Congo and adjoining conflict-affected and high-risk areas.
The reporting obligations come from two main frameworks: in the US, Section 1502 of the Dodd-Frank Act requires SEC-listed companies to file a Form SD where 3TG are necessary to the functionality or production of their products; in the EU, Regulation (EU) 2017/821 places due-diligence duties on importers of 3TG. Both turn on the presence of 3TG.
Brass and the 3TG minerals
Standard brass alloys (CW617N, CW602N, CW724R) are composed of copper, zinc, lead and silicon — none of which are 3TG minerals. Brass and copper products are therefore generally outside the scope of conflict-minerals reporting.
| 3TG mineral | Present in brass? |
|---|---|
| Tin (Sn) | No — trace only in certain special grades |
| Tantalum (Ta) | No |
| Tungsten (W) | No |
| Gold (Au) | No |
What we provide
For customers who must demonstrate conflict-minerals due diligence to their own supply chain — for example SEC-listed OEMs supplying automotive or electronics programs — Brassland provides a written scope-determination letter confirming that our brass and copper products fall outside the 3TG scope and that no conflict-minerals filing is required for them. Where a customer's system requires it, we can also supply a completed RMI CMRT for your records. See our materials library for the composition of each alloy.
Getting CMRT documentation
Your reporting need
Let us know whether you need a scope-determination letter, a completed CMRT, or both for your due-diligence system.
Scope determination
We confirm in writing that the brass or copper grades you buy contain no 3TG minerals.
CMRT & letter
You receive the documentation to attach to your own conflict-minerals reporting — same business day on request.
Common questions
What minerals do the conflict-minerals rules cover?
Are brass fittings in scope for conflict minerals?
Can Brassland provide a CMRT?
Is your supply chain conflict-free?
Verify against the primary source
The regulatory data summarised on this page is cross-referenced against the publishers below. Always confirm requirements against the current published text before relying on this summary.
Last reviewed: June 2026 · maintained by the Brassland compliance team. Conflict-minerals frameworks are updated periodically; the official RMI, SEC and EU texts always prevail — verify the current requirements at the source. General guidance, not legal advice.
Need conflict-minerals documentation?
CMRT, scope-determination letters and material data — typically available the same business day.