Gautam Tubes is bulk producer and supplier of industrial-demanding ASTM A213 T91 Alloy Steel Seamless Tube. These tubes are designed under the compliance of nationally approved standards, thus it match requirements of critical and demanding engineering applications. Seamless tubes have many prominent features that are ideal for various industrial sectors.
We fabricate alloy steel seamless tubes with various machining allowances and tolerance limits so it can be used in multiple engineering sectors. Our manufacturing facility runs under the norms of national and international approved standards.
In our inventory, we stock these seamless tubes in a variety of standards, designations and custom dimensions to fulfill various requirements of our customers. With the availability of trending machinery, we are able to fabricate products that meet industrial demanding applications.
T91 is a ferritic and martensitic grade. It has 9 % chromium and 1 % molybdenum content micro alloyed with niobium and vanadium content. Moreover, it has controlled nitrogen content as per ASTM A213 under desired national standards.
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This grade has outstanding performance, higher temperature strength and creep properties up to 580 deg C to -600 deg C. The chromium content present on it offers good corrosion and oxidation resistance than a standard grade. Importantly, it reduces the weight of piping assembly resulting in superior performance compared to other standard grades as well as allows for greater resistance to thermal failures. In elevated temperature application, it has higher heat transfer and low coefficients of thermal expansion.ASTM A213 T91 Alloy Steel Seamless Tube provides higher creep to rupture strength that is attained without by metal treatment process.
These tubes shall be either cold or hot finished products as per the end application requirements. Mainly, these tubes are cold finished. The heat treatment operations are done individually. Also, it is heated and hot formed. The ferritic grade should be reheated. The dimensions and accuracy are furnished in the heat-treated state. Immediately after the hot forming operation, it is cooled by air. It is not cooled down than the minimum solution temperature. ASTM A213 T91 Alloy Steel Seamless Tube is quenched by water or other means of cooling agent.
Standard Specification and Size Range of ASTM A213 Gr T91 Alloy Steel Tube
ASTM A213 / A213M T91 Tube Specifications : ASTM A213 / ASME SA213
SA213 T91 Tube Dimensions : ASTM, ASME and API
A213 Alloy Steel T91 Seamless Tube Size : 6.35mm o.d to 101.60mm o.d
A213 T91 Tube Thickness : 3-12mm
Alloy Steel T91 Tube Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS, UPTO 4″ WALL THICK
A213 T91 Tube Type : Seamless
ASTM A213 Alloy Steel T91 Tube Form : Round Tube, Square Tube, Rectangular Tube, Hydraulic Etc.
ASTM A213 Alloy Steel T91 Tube Length : max 1~12m, Single Random, Double Random & Cut Length
Outer Dimensions : 6-2500mm; WT:1-200mm
Specialized in : ASME SA213 T91 Boiler Tube, ASTM A213 T91 Superheater Tube, A213 T91 Heat Exchanger Tube
ASTM A213 T91 Tube
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Chemical Composition of ASTM A213 T91 Seamless Steel Tubes
|Grade||C, %||Mn, %||P, %||S, %||Si, %||Cr, %||Mo, %|
|T91||0.08-0.12||0.30-0.60||0.020 max||0.010 max||0.20-0.50||8.00-9.50||0.85-1.05|
Mechanical Properties of ASME SA213 Gr T91 Alloy Steel Tube
|ASTM A213 Grade||Tensile Strength, MPa||Yield Strength, (Mpa)||Elongation, %|
|T91||585 min||415 min||20 min|
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Oil and Gas
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