flat bar :material can be CuCrZr(C18150),CuCr(C18200),CuZr(C15000),CuBeNi(C17510),CuNi2SiCr has ISO9001 and ISO5182 certificate flat bar:1. material: CuCrZr(C18150),CuCr(C18200),CuZr(C15000),CuBeNi(C17510),CuNi2SiCr(C18000).2.Specifications: 1) Hardness: ≥26 HRC 2) Thermal conductivity (w/m,k), 20°C: ≥115 3) Strength: ≥850 Mpa. flat bar electrode bar