DIN 2391 EN10305-1 St35 St45 St52 E355 galvanizing Hydraulic tubes Application : Hydraulic tubes. Material: St35 St45 St52 E355 Standard : DIN 2391 EN10305-1 Surface treatment: Galvanizing, to protect material from rust. OD : 4- 20mm WT :0.5-10 mm Characteristic: 1.Bright annealing treatment on ...