Large Size Copper line

Oxygen-free copper row Using oxygen-free copper extrusion production specifications row Project NameTechnical requirementsExperimental methodsMaterialsGB/T486-97 standards in line with copper to seal extrusion ingot breakdown, dense texture, uniform, non-shrinking, porosity, inclusions, such as stratification and defectsGB/T8121.1, YB732-71 or non-destructive testingYam electric rateModelNegative rate of 20 °C DC Ω mm2 / mConductivity% IACSGB/T3048.2TMR,THMR≤0.017241≥100TMY,THMY≤0.01777≥97Mechanical propertiesModelTensile strengthElongation %Brandt HardnessGB4903.3 GB4903.8TMR,THMR≥206≥35———TMY,THMY——————≥65BendingGB/T5585.1-2005 comply with the provisions of paragraph 4.82 GB/T4909.6Size and biasConsistent with the provisions of Section 4.4 or GB/T5585.1-2005 drawings request GB/T4909.2StraightnessGB/T5585.1-2005 comply with the provisions of paragraph 4.7 or agreement GB/T4909.2Surface stateGB/T5585.1-2005 comply with the provisions of paragraph 4.11 Normal eyesight check