https://windsorsteel.com/steel-products/steel-color-code-reference-chart/
Steel Color Code | Windsor Steel Corporation | Custom Steel Cutting |South Windsor CT
Aug 18, 2023 - These two charts show the color codes we use, the grades of steel we carry, and a useful fraction to decimal conversion chart.
steel color codecustom cuttingwindsorcorporationsouth
https://www.dspipe.com/product/copper-tubing-54/
Copper Tubing - 1/2" Type M Copper Tube 20' *** Color Code: RED *** | DS Pipe & Steel Supply