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CW604N | CuZn37Pb0.5 Stress corrosion cracking

Numeric designationCW604N
Chemical designationCuZn37Pb0,5
StateStress corrosion cracking
EtchingMessingätzmittel

The screw connection of a water fitting has broken due to stress corrosion cracking caused by excessive hardness (131 HBW 2.5/62.5). Parallel to the fracture, there are numerous other, predominantly transcrystalline cracks with typical branching on the inside. The microstructure is a pure alpha brass.