CuCrNb (GRCop) Copper Alloy Powder
Copper Alloy Powders · Metal Additive Manufacturing Powder
CuCrNb is chromium-zirconium copper upgraded with a small niobium addition to form a stable Cr₂Nb precipitate phase. High-temperature softening resistance is significantly better than plain CuCrZr — the same design idea behind NASA GRCop-84/GRCop-42 liners for liquid rocket engine combustion chambers, where the wall must combine copper's high thermal conductivity with strength retention under extreme heat flux cycling. Applications include combustion chambers and nozzles, high-power electronic heat sinks and fusion-device high-heat-flux components. There is no unified national standard; orders follow aerospace/defense protocols or buyer-seller technical agreements. Lead time and master-alloy batch consistency usually matter more than unit price, and small-batch validation of high-temperature softening resistance and density is standard practice.
Typical Applications
CuCrNb (GRCop) Copper Alloy Powder - Key Properties
| Chemical composition (wt%) | Cu bal · Cr micro-alloyed · Nb micro-alloyed (Cr₂Nb precipitate) |
| Density | ~8.8 g/cm³ (standard typical value) |
| High-temp behavior | Softening resistance superior to plain CuCrZr (per supplier cert) |
| Particle size | 15-53 µm (SLM) · 0-15 / 45-105 / 53-150 µm cuts also offered |
| Platform price (CNY/kg) | ~1500-1800 (supplier quotes, non-transactional, 30-day delay) |
| Standards | No unified national standard — aerospace/defense technical agreements; GRCop-84/42 as NASA reference |
3 product offer(s) — 2 supplier(s)
Frequently Asked Questions
What is the difference between CuCrNb and CuCrZr?
CuCrNb adds niobium to form a stable Cr₂Nb precipitate, so it retains strength at high temperature much better than CuCrZr. It is the choice for rocket combustion chambers and other components that must stay strong while conducting intense heat flux.
Which particle sizes are available?
15-53 µm for SLM and several other cuts (0-15, 45-105, 53-150 µm) for LMD/other processes. Pick the cut by process: SLM fine powder, LMD/DED coarser.
What should I negotiate first — price or lead time?
Lead time and master-alloy batch stability. CuCrNb is a niche grade with a high-barrier master alloy; a stable supply of consistent lots matters more than a small price difference.
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