How to tell the difference between copper and brass?

1, Color difference of copper and brass

We can see that the surface of the copper and brass plate is not the same, the color of the brass plate is generally golden yellow, more glossy, but the color of the purple copper plate is red, but also glossy, purple copper plate is called red copper, is pure copper, copper and brass in the color is not the same! In fact, the color can be distinguished at a glance, the surface oxidation of the purple copper plate, there is a layer of red cuprous oxide, looks like the color is purple red. Hardness on the purple copper to be a little harder than brass, similar weight! Thus, we can distinguish from the appearance of the color.

2, The composition distinction of copper and brass

Purple copper plate is the main component of copper, and copper content can reach more than 99.9%, although the composition of brass plate copper but also zinc, copper content in 60% up and down, zinc content in 40% up and down, and other grades of brass is not the same as the amount of lead will also change in the analysis of the chemical composition is also very good at distinguishing.

3, Tensile strength difference of copper and brass

Copper plate and brass plate in the tensile strength is not the same, we can distinguish from the tensile strength, brass plate chemical composition is more so the tensile strength is high, but the composition of purple copper plate is more pure, relative to the tensile strength than the brass plate will be a little lower.

4, The relative density distinction 

Brass plate density is in the 8.52-8.62 range, we often use 8.6 to calculate the weight, copper plate density is in the 8.9-8.95 range, we often use 8.9 to calculate the weight.

Brass plate accompanied by zinc composition of the enhancement so they can all be very good to bear the hot state production processing, commonly used in mechanical equipment and electrical appliances a variety of parts, hardware stamping parts and musical instruments.

Purple copper plate has good electrical and thermal conductivity, and corrosion resistance, ductility. Copper plate has good ductility, it is often found in the electrical industry.

Purple copper plate has good mechanical properties, good plasticity in the hot state, plasticity in the cold state is still available, good machinability, easy to fiber welding and soldering, corrosion resistance, but easy to corrosion rupture, in addition to the price is cheap, is widely used in a variety of common purple copper