hydraulic hose fitting 1.Material :Carbon steel GB-Q235(ASTM 1020) 2.Surface:Cr+3 or Cr+6 Zinc Plating etc 3.ISO9001:2000 Name: Hydraulic Hose FittingMaterial: carbon steel GB-Q235(same as ASTM1020 steel)Surface treatment: zinc plated We are a professional Hydraulic fitting, Hydraulic hose fitting, Ferrule, Hydraulic Adapter, Hydraulic connection, Hydraulic coupling manufacturer in Ningbo ...