This standard specifies the measurement method for silicon content in copper and copper alloys. This standard applies to the determination of silicon content in copper and copper alloys. Measuring range: 0.0010% to 0.025%.
GB/T 5121.20-1996 history
2008GB/T 5121.20-2008 Methods for chemical analysis of copper and copper alloys.Part 20:Determination of zirconium content
1996GB/T 5121.20-1996 Copper and copper alloys--Determination of zirconium content