According to the standard, stamping elbows can be divided into: national standard stamping elbows, non-standard stamping elbows, international standards: German standard, Japanese standard, American standard, British standard stamping elbows.
 

Carbon steel is used to connect two pipes with similar nominal sizes to make 90-degree bends. Carbon steel stamping elbows usually contain a small amount of silicon, manganese, sulfur and phosphorus besides carbon. Carbon steel can be divided into three types according to its usage: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is also divided into construction steel and mechanical manufacturing steel. There are two kinds of structural steel, which can be divided into open-hearth steel, converter steel and furnace steel according to smelting style. They can be divided into boiling steel, comfortable steel, semi-comfortable steel and special comfortable steel according to deoxidizing style. Carbon steel can be divided into low-carbon steel, medium-carbon steel and high-carbon steel according to carbon content. Carbon steel can be divided into common carbon steel, high-quality carbon steel and high-quality steel according to phosphorus and sulfur content. Steel and premium grade steel.
 

Stamping elbow can be divided into: carbon steel stamping elbow, stainless steel stamping elbow, alloy steel stamping elbow.