T91/P91 steel is a ferritic alloy heat resistant steel developed on the basis of T9 steel by fine crystallization, microalloying and controlled rolling and cooling processes. The steel has good mechanical properties, stable structure after high-temperature aging, and good welding and technological properties. T91 tubing belong to ASTM A213 which do Ferrite and Austenitic boiler superheater and heat exchanger seamless steel tube. But for ASTM A335 P91 tubing, they intended for Ferritic and alloy seamless steel tubes intended for high-temperature service. Both of them can be used in engineer components, superheater coils, headers and steam piping with less thickness.
Standards: ASTM A213 /ASTM A335
Dimension: 1/8” to 24”
Wall thickness: SCH10 to 160
Length: 1m to 12m or Custom Length
Application: It can be used for superheater, reheater pipe, header and steam pipe under 600℃ in high pressure, ultra-high pressure and subcritical power station, and also can be used as nuclear power heat exchanger and oil cracking unit furnace pipe.
P91/ T91 Equivalent Material
ASTM | DIN | JIS | GB |
P91/ T91 | X10CrMoVNNb91 | STBA 26 | 10Cr9Mo1VNbN |
P91/ T91 Pipe Chemical Composition
Grades | C | Mn | P,≤ | S,≤ | Si | Cr | Mo | W |
P91 | 0.07-0.13 | 0.3-0.6 | 0.02 | 0.01 | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | / |
P91/ T91 Mechanical Properties
Material | Yield strength ReH/Rp0,2 N/mm² min | Tensile strength Rm N/mm² | Elongation A % min |
P91/T91 | 415 | 585 | 20 |
World iron&steel is a leading supplier, manufacturer and wholesaler of P91 and T91 steel tube. We stock and supply ASTM A213 T91 and ASTM A335 P91 seamless steel pipes in various specifications and sizes. If you are looking for this material, please contact us or get a quotation. Not only do we have general sizes, but we also have all kinds of sizes that are hard to find.
