Brass is roughly 57 to 63% copper in the common grades, with zinc and small amounts of lead or other elements making up the rest. When the copper price moves, the cost of the brass bar or forging moves with it, and so does the metal part of your quote.
How much your part price changes depends on how much of that price is metal. For a heavy, simple fitting, metal can be most of the cost. For a small, precise part with a long cycle time, machining matters more.
How the price passes through
- Copper is traded on international metal exchanges, and the price changes daily.
- Indian brass rod and scrap prices follow copper and zinc, along with local supply, duty and currency.
- Rod makers adjust their rates, often weekly or even daily.
- Part makers update their metal rate and reissue quotes.
- Zinc and lead prices also move, but they make up a smaller share of the alloy.
Currency matters too
Metal is priced internationally in US dollars. If the rupee weakens against the dollar, rupee metal costs rise even if the dollar copper price is flat. If you buy in dollars or euros, currency moves can cancel or add to metal moves.
Agree which currency the quote is in and whether the metal clause uses a dollar or rupee reference. Mixing the two in one contract makes adjustments hard to check.
How to manage the risk
You cannot control copper, but you can control how it enters your contract. These are common approaches:
- Split every quote into a metal portion and a conversion portion, so only the metal portion moves with copper.
- Agree one reference price for metal, such as a published brass scrap or copper rate, and a fixed date or averaging period.
- Reset the metal price at agreed intervals, for example each month or each order, rather than on every invoice.
- Set a band within which no adjustment applies, so small moves do not cause new paperwork.
- Fix the price for a whole order once the purchase order is confirmed, and lock the metal by agreeing to a quick deposit.
Signs a supplier is absorbing too much
If copper rises sharply and a supplier holds its old price without a clause, it may protect its margin in other ways. It may switch to cheaper rod, cut plating thickness or delay your order behind better-paying ones. A clear metal clause is better for both sides.
That is one reason quality can change between orders, as described in why quality drops after the first container. The full price build-up is in how brass components are priced.
Next step
We check quotes line by line and help you agree a metal clause before the order starts. To review your brass costs, book a free sourcing review.