Carbon steel seamless elbows are divided by material: low carbon steel, medium carbon steel, high carbon steel, No. 20 steel (20g), q235a, q235b, etc., which are characterized by relatively high carbon content; according to standards, they are divided into: national standard , non-standard, international standards: German standard, Japanese standard, American standard, British standard elbow.
The raw material of carbon steel seamless elbow is seamless steel pipe. The main production process is round tube blank → heating → piercing → three-roll cross rolling, continuous rolling or extrusion → tube removal → sizing (or diameter reduction) → cooling → Straightening → hydraulic test (or flaw detection) → marking → storage. schxx is the wall thickness grade, 90e(s) represents a short radius 90 degree carbon steel elbow; 90e(l) represents a long radius 90 degree elbow; 45e(l) represents a long radius 45 degree elbow; 45e(s) represents a short 45-degree radius elbow; 180e(s) represents a short-radius 180-degree carbon steel elbow; 180e(l) represents a long-radius 180-degree elbow.
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