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High-performance steel alloy Alloy Steel T91, sometimes referred to as ASTM A335 P91, is made especially for uses requiring a high degree of strength, toughness, and temperature tolerance. T91 tubes are widely employed in the power generating sector, especially in steam boilers and superheaters, and are vital parts of numerous important systems. T91 is an advanced alloy steel that has trace quantities of vanadium, molybdenum (1%), and chromium (9%). Superior mechanical qualities and increased resistance to thermal creep, oxidation, and corrosion are conferred by this combination of components on the steel. The steel's superior resistance to high temperatures and preservation of structural integrity under stress is attributed to its high chromium concentration.
T91 tubes are primarily used in the building of systems with high temperatures and pressures, including power plant boilers, where they improve efficiency and safety. The alloy is perfect for usage in situations where traditional carbon steels would fail because of its high tensile strength and resilience to thermal fatigue. It is also used in petrochemical facilities and other sectors of the economy where resistance to high temperatures is essential.
Because T91 alloy has specific qualities, it requires special processes to fabricate and weld. For it to keep its ductility and mechanical strength, proper heat treatment is necessary. Preheating and post-weld heat treatment are frequently used in the welding process to guarantee the integrity of the welded connections and prevent possible problems like cracking.
Tube Specification : ASTM A213 / ASME SA213
Size : 1/2" NB To 36" NB
Outside Diameter (OD) : 19.05mm – 114.3mm
Wall Thickness : 2.0mm – 14 mm
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type : Seamless / EFW / Cold Drawn / Annealed & Pickled / Hot Finished / Extruded / Structural
Form : Round Tubes
Length : Single Random, Double Random & Cut Length
End : Plain End, Beveled End, Threaded
End Protection : Plastic Caps
Finish : Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Origin : Indian Origin, European Origin, Japanese Origin
Testing and Documents : Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, Destructive Test Report, Non Destructive Test Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports
Packing : Packed in Wooden Boxes, Bubble wraps, Steel Strips Bundled, or as per Customers Requests
A Wide Range of ASTM A213 T91 Alloy Steel Tubes at Best Price.
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GRADE | UNS | TRADE NAME |
T91 | K90901 | T91 |
C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % | V, % | N, % | Ni, % | Al, % | Nb, % |
0.08-0.12 | 0.3-0.6 | 0.02 max | 0.01 max | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.03-0.07 | 0.4 max | 0.04 max | 0.06-0.10 |
Tensile Strength, MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
585 min | 415 min | 20 min | 250 max |
Outside Diameter | OD Tolerance | WT Tolerance | Ovality Tolerance | Cut Length Tolerance |
OD≤ 12, 7 mm | ± 0, 13 mm | ± 15 % | – | + 3, 18 mm, – 0 mm |
12, 7 mm < OD ≤ 38, 1 mm | ± 0, 13 mm | ± 10 % | max, 1, 65 mm | + 3, 18 mm, – 0 mm |
38, 1 mm < OD ≤ 88, 9 mm | ± 0, 25 mm | ± 10 % | max, 2, 41 mm | + 4, 76 mm, – 0 mm |
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