DIN17175 St35.8 is a seamless steel pipe produced according to the German standard DIN17175, where "DIN17175" refers to the German standard number for heat-resistant seamless steel pipes, and "St35.8" represents the specific quality grade of this steel pipe. This kind of steel pipe is mainly used in the manufacture of high pressure boiler heating surface pipe, economizer, collector, superheater, reheater, etc., and is also used in the manufacture of petrochemical industry pipes.

St35.8 quality grade pipes require special measures during the manufacturing process or special careful selection of the melting furnace to ensure their high quality. In addition, all pipes of this quality grade need to be inspected by the pipe factory, such as ultrasonic inspection, to ensure that the quality of the steel pipe meets the requirements of the standard. Therefore, DIN17175 St35.8 steel pipe with its excellent heat resistance and mechanical strength, in the high-pressure boiler and petrochemical industry and other fields have been widely used.

 

DIN17175 St35.8 Features:

 

High quality requirements: The DIN17175 standard has very high requirements for St35.8 quality grade pipes, requiring special measures in melting or reprocessing, or particularly careful selection of melting furnace.

 

Strict inspection: All the pipes of this quality grade should be inspected by the pipe factory to ensure the quality of the steel pipe. Ultrasonic inspection is one of the important criteria to distinguish the quality of this kind of steel pipe.

 

The chemical composition of DIN17175 St35.8 mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P) and sulfur (S). Specifically, the carbon content (C) should not be greater than 0.17%, the silicon content (Si) should be between 0.10 and 0.35%, the manganese content (Mn) should be between 0.40 and 0.80%, and the phosphorus (P) and sulfur (S) content should not be greater than 0.030% respectively. The proportional control of these chemical components ensures the mechanical and processability of the steel pipe.

 

DIN17175 St35.8 steel pipe is mainly used in high pressure boiler heating surface, economizer, header, superheater, reheater and petrochemical industry pipe. In these application scenarios, its excellent heat resistance and mechanical strength are fully utilized.