Astm A213/ ASME SA213 T91 Alloy Steel Seamless Tubes

 



Tube T91 material is acidic and chloride-resistant. In high-temperature applications, it is used. The tubes comply with ASTM A213 T91 Alloy / ASME SA213 and A691. Among the leading manufacturers and suppliers of T91 Tube Material is The Steel Exporter. ASTM, ASME, and API standards cover the dimensions of the tubes. Tube diameters range from 12 inches to 5 inches and wall thicknesses range from 1mm to 200mm.

The length can vary up to 2500mm depending on the application. As its name implies, the T91 Tube is used in high-pressure, high-temperature applications such as boilers. Tubes have different pressure capacities, which are measured by schedules.

 

It is also known as the T91 Buffer Tube because it buffers acids and chlorides from reacting with it. Material hardness can be increased by annealing, normalizing, and quenching.

 

Tube T91 must be cooled in hydrogen atmosphere to prevent oxidation at high temperatures from altering the bright surface. After cooling, the tube is ready for use. The material contains carbon, manganese, phosphorus, sulfur, silicon, molybdenum, and chromium. ASTM A213 T91 Alloy/ ASME SA213 T91 Tube has a minimum yield strength of 205MPa and a minimum tensile strength of 585MPa. The alloy is also very hard compared to other grades of similar alloys. Max hardness is 250 HB.

 

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