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1.0570 Material St52-3 Steel Equivalent, Properties , st52 steel welding steel coil. DIN 17100 St52 Steel.St52 steel (St52-3) is an unalloyed structural steel grade complies with DIN 17100 1980, the designation has been discarded since 2004. According to German standard DIN 17100, St52 steel is divided into St52-3U (1.0553) and St52-3N (1.0570 material).sewer pipe natural gas steel pipe - ASTM A573/A573M Steel , Buy P2Perforated Steel Die Steel SheetCSST vs. Black Iron Pipe - CSST Facts. The gas leaked through a one-eighth inch diameter hole in the pipe, which was located where the gas pipe crossed over the sewer pipe that served the house. An electrical arc between the steel gas service pipe and the iron sewer pipe created the hole in the gas service pipe.Plymell KS 3 people dead from gas explosion cause unknown