sink copper flange metallurgy process MPIF/35 2000 FC2008-60 standard tensile strength : 550MPa. density:more than 7.5g/cc This flange according to American MPIF/35 2000 FC2008-60 standard production, including copper 15-25%, density ≥7.5g/cm3, degree of hardness HRB≥80, tensile strength 550MPa.uses 1 suppression, 2 agglutinations (infiltrate copper), product superficially attractive entire, infiltrates the copper evenly artistic