High-durable pneumatic radial tires

B - Operations – Transporting – 60 – C

Patent

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Details

152/82, 152/85.1

B60C 9/00 (2006.01) B60C 9/20 (2006.01) C21D 8/06 (2006.01) D07B 1/06 (2006.01)

Patent

CA 1218588

Abstract of the Disclosure A high-durable pneumatic radial tire is disclosed using steel cords in at least one of the carcass and the belt. This steel cord is produced by twisting plural steel filaments each having a tensile strength of not less than 220 kgf/mm2, whose metallic structure being a fine pearlite structure having an average value of interlamellar distance between cementites of 300-500.ANG. and an average sectional area of single pearlite crystal grain in filament section of not more than 20 µm2.

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