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Basic Info.
Product Description
A213 T91 Alloy Pipe. A-213 T91: "A" is the mark of ASTM steel material. "213" refers to the specification reference number, "T91" refers to the steel grade classification, "T" refers to small diameter pipe, equivalent to China's 10Cr9Mo1VNbN pipe.
ASME A213 Gr T91 Boiler Tube is made up of a boiler grade alloy that is used in petroleum, petrochemical, heat exchanger, condenser and boiler applications. Steel India Company is a leading manufacturer and supplier of the Alloy Steel T91 Seamless Tubing in many different forms and sizes. The material is a T91, K91560 grade with carbon, manganese, phosphorus, sulfur, silicon, molybdenum, vanadium, nitrogen, nickel, aluminum, niobium and 8% chromium in the composition.
The ASTM A213 T91 chrome moly tube is very much corrosion resistant and heat resistant so that it can operate under high temperatures with corrosion resistance. The pipes are seamless in production and are hot rolled or cold drawn. The sizes range from 6.35mm to 101.6mm outer diameter with wall thicknesses ranging from 1mm to 200mm. The length of the SA 213 T91 Boiler Tube ranges from 1m to 12m with single random, double random and cut to length sizes. The applications require different pressure capacities and the pressure capacities of the Alloy Steel T91 Welded Tubes range from standard, sch40 and sch80 schedules. There are different forms of the pipes such as the round, square, rectangular and hydraulic types. The pipes also have different pipe ends such as the threaded, beveled and plain end types. The ASME SA213 Grade T91 Seamless Tube high strength with minimum yield strength of 415MPa and minimum tensile strength of 585MPa.
ASTM A213 T91 Seamless Ferritic Alloy-Steel Boiler Tubes
A-213 T91: "A" is the mark of ASTM steel material. "213" refers to the specification reference number, "T91" refers to the steel grade classification, "T" refers to small diameter pipe, equivalent to China's 10Cr9Mo1VNbN small diameter pipe.)
A-213 t91 is ASTM A-213 / A-213m standard steel grade: in 1970s, based on 9Cr-1Mo steel, a new type of ferritic shape steel was formed by adding a small amount of Nb and V microalloying elements and controlling the content of n elements in 9Cr-1Mo steel by several laboratories and burnxiao engineering company in the United States. The steel has good comprehensive mechanical properties, stable structure and properties before and after aging, good welding and technological properties, high endurance strength and oxidation resistance. In 1995, the steel was transplanted into GB5310 standard in China, and the grade was 10Cr9Mo1VNb.
Standard:ASTM A213/ASME SA213
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
| Grade | UNS Number | Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range ºF [ºC] | Cooling Media | Subcritical Annealing or Tempering Temperature, min or range ºF [ºC] | ASTM Grain S |
| Ferritic Alloy Steels | ||||||
| T91 | K90901 | normalize and temper | 1900-1975 [1040-1080] | … | 1350-1470 [730-800] | … |
2.ASTM Grain Size No. listed, or coarser, unless otherwise indicated.
Chemical Composition of ASTM A213 T91 Seamless Boiler Tubes
| Chemical Composition(%) | |||||||||||
| C | Mn | P | S | Si | Cr | Mo | V | N | Ni | Al | Nb |
| 0.07-0.14 | 0.3-0.6 | ≤0.02 | ≤0.01 | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.03-0.07 | ≤0.4 | ≤0.04 | 0.06-0.10 |
Mechanical Properties of ASTM A213 T91 Seamless Boiler Tubes
| Low Alloy Steels | ||||||
| Grade | UNS Designation | Tensile Strength, min, ksi [MPa] | Yield Strength, min, ksi [MPa] | Elongation in 2 in. or 50 mm, min, % | Hardness | |
| Brinell/Vickers | Rockwell | |||||
| T91 | K90901 | 85 [585] | 60 [415] | 20 | 190 to 250 HBW/ 196 to 265 HV | 90 HRB to 25 |
(1)Tension test--One tension test shall be made on a specimen from one tube for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes.
(2)Hardness Requirements-- Brinell, Vickers, or Rockwell hardness tests shall be made on specimens from two tubes from each lot.
(3)Flattening Test--One flattening test shall be made on specimens from each end of one finished tube.
(4)Flaring Test--One flaring test shall be made on specimens from each end of one finished tube.
Surface Condition
Ferritic alloy cold-finished steel tubes are free of scale and suitable for inspection.
Ferritic alloy hot-finished steel tubes are free of loose scale and suitable for inspection.
Used for superheater reheater heat exchanger and other boiler equipment.
Q:How do you control quality?
A:Mill test certification is supplied with shipment,third party inspection is avaliable.
Q:What are the advantages of your company?
A:We have many professionals,technical personnel,more competitive prices and best after-sales service than other stainless steel companies
Q:How many coutries you already exported?
A:Exported to more than 50 countries mainly from Arab, Kuwait, Egypt, Turkey, Jordan, Brazil, India, Indonesia, Korea, etc
Q:Can you provide sample?
A:Small sample in store and can provide the sample for free.Customized samples will take about 5-7days
Q:Why should you buy from us not from other suppliers?
A:Diversified products, direct supply from manufacturer.
Q:What is your terms of payment ?
A:we accept T/T ,L/C ,D/A,D/P, Western union, paypal ,The payment method can be negotiated by both parties according to the actual situation.
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