... Sort of steel packing strips]:(1) White steel packing strips(2) Blue steel packing strips(3) Paintbaked steel packing strips(black,green,gray, ... 58-78Kg/mm2(580-780Mpa),elongation3%-5%.(2)Ordinary steel strips():tensile strengthσb≥78-90Kg/mm2(780-900Mpa),elongation3%- ... 5%.(3)High quality steel strips:high high intesity,good capability,bearing impact.tensile strength: ...