Process introduction: fine drawing, non oxidizing light heat treatment, 100% nondestructive testing, high pressure rinsing of the inner wall of steel tube, and rust proof oil on the exterior and outer surface of the steel pipe as antirust treatment.
The main features are: high precision, good finish, no oxidation layer on the inside and outside wall of steel tube after heat treatment, good interior wall cleanness, high pressure of the steel tube, cold bending, no deformation, expansion, flat and no crack, and can be used for various complex deformation and mechanical processing.
Main applications: hydraulic system, auto parts, other customers with high requirements for steel tube accuracy, finish, cleanliness and mechanical properties.
Production standards: DIN2391, EN10305-1, EN10305-4 and so on
Steel number: St37.4, St35 (E235), St45 (E255), St52 (E355), etc.
External diameter: 4-60 mm wall thickness: 0.5-8mm