ASTM A213 T91 Seamless Tube

Product NameASTM A213 T91 Seamless Tube
MaterialFerritic Alloy Steel
SpecificationASTM A213 / ASME SA213
Size RangeOuter Diameter: 6.35mm - 219.1mm
Wall Thickness: 0.8mm - 15mm
Length: Up to 12 meters
Manufacturing ProcessSeamless
StandardsASTM A213 / A213M
CertificationISO 9001, API 5L, CE
Categories: ,


Product Description

ASTM A213 T91 seamless tube are high-strength, ferritic alloy steel tubes designed for high-temperature service in boiler, superheater, and heat-exchanger applications. These tubes are renowned for their exceptional resistance to oxidation and corrosion, combined with high creep strength and durability at elevated temperatures. The T91 grade’s unique chemical composition ensures enhanced performance and longevity in demanding environments.

Chemical Composition ASTM A213 T91 Seamless Tube

ElementComposition (%)
Carbon (C)0.08 - 0.12
Manganese (Mn)0.30 - 0.60
Phosphorus (P)0.020 max
Sulfur (S)0.010 max
Silicon (Si)0.20 - 0.50
Chromium (Cr)8.00 - 9.50
Molybdenum (Mo)0.85 - 1.05
Vanadium (V)0.18 - 0.25
Nitrogen (N)0.030 - 0.070
Niobium (Nb)0.06 - 0.10
Aluminum (Al)0.02 max

Mechanical Properties ASTM A213 T91 Seamless Tube

Tensile Strength, min (MPa)585
Yield Strength, min (MPa)415
Elongation, min (%)20
Hardness, max (HBW)250


ASTM A213 T91 seamless tubes are engineered to meet the stringent requirements of high-temperature applications. The alloy’s precise chemical composition ensures high creep strength, oxidation resistance, and long-term durability. These tubes are particularly suitable for power plants, petrochemical facilities, and other industrial settings where reliable performance under extreme conditions is crucial. With their superior mechanical properties and resistance to thermal stress, ASTM A213 T91 seamless tubes provide an optimal solution for enhancing the efficiency and longevity of critical systems, offering significant operational and maintenance cost benefits.


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