Copper & Aluminium Alloy Grades
27 grades with composition, applications and scrap classification — and, for each Chinese GB designation, the nearest UNS equivalent. If you have a Chinese quotation in front of you that says H62 and you need to know what to ask for at home, that column is why this page exists.
Quick cross-reference
The eight asked about most often. Full tables with composition are on the metal pages below.
| Chinese GB | Nearest UNS | Material |
|---|---|---|
| T2 | C11000 | ETP copper |
| TP2 | C12200 | DHP copper |
| H62 | C27400 | Yellow brass |
| H68 | C26000 | Cartridge brass |
| QSn6.5-0.1 | C51900 | Phosphor bronze |
| QBe2 | C17200 | Beryllium copper |
| B10 | C70600 | Cupronickel 90/10 |
| B30 | C71500 | Cupronickel 70/30 |
Nearest equivalent, not an equals sign — the composition ranges overlap but do not coincide. See the explanation below before substituting anything.
Full tables by metal
Descriptive names versus index numbers
Chinese GB designations describe what is in the alloy. H62 is brass at 62% copper; B30 is cupronickel at 30% nickel; QSn6.5-0.1 is tin bronze with 6.5% tin and 0.1% phosphorus.
UNS numbers describe nothing. C26000 places the alloy in the brass block and no more — the digits are an index.
That is why no formula converts between them, and why the ranges rarely match exactly: H62 is 60.5–63.5% Cu, C27400 is 61–64%. Treat every cross-reference here as a way to find the right material to talk about, then confirm the actual requirement against the governing specification.
Aluminium is the easy case: the four-digit numbers (6061, 5052, 7075) are the Aluminum Association system, adopted directly into GB/T 3190. Same number on both sides. The exception is casting alloys — ADC12 is Japanese, A380 is American, and they are close but not the same.
Related
Composition ranges follow the Chinese national standards (GB/T). Cross-references are nearest-equivalent grades and are not a certification of interchangeability.