We has specialized in manufacturing steel tubes for automobiles and appliances for over 20 years. A tremendous commitment to research and development has been made in order to produce better tubes. These tubes are an essential component for ensuring the safety and performance of automobiles and appliances. Related Certified Spec. YB/T4164-2007: Chinese Standards SAE J527: Society of Automotive Engineers ASTM-A254 : American Society for Testing Materials MS191-21 : HYUNDAI & KIA Motors Standards JASO M 101 : Japanese Automotive Standards copper plating of inner and outer walls, maintaining cleanliness and gloss Maintaining pressure resistance with Max. 1200kg/cm2 Durability with air-tightness against vibration and impact Tensile Strength: 290MPa Yield Strength: 200MPa Elongation: 40% Flaring TestFlaring: 25%