Copper 18150 Rectangular Bar 1-1/2" x 5/8" Retail Price

About 18150|Chromium copper (99% copper, 1% chromium). Precipitation-hardenable to moderate strength (60–70 KSI tensile) while retaining about 80% of pure copper’s electrical conductivity. The go-to alloy for resistance welding electrodes and applications requiring the combination of strength, conductivity, and heat resistance. Machines better than pure copper in the hardened condition since the chromium gives chips more body. No beryllium toxicity concerns. Compare to 17510 beryllium copper (much stronger but toxic dust) and C110 (softer, higher conductivity, no heat resistance).

About Rectangular Bar|Solid rectangular cross-section stock. Functionally similar to flat bar but typically available in thicker, chunkier profiles. The naming varies by supplier — what one calls rectangular bar, another calls flat bar. Used for keys, gibs, wear strips, brackets, and any part where a rectangular starting profile saves setup time versus milling from plate.