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ISO Approved Manufacturer & Exporter of ASTM A 335/ A691 GR P91 Alloy Steel Seamless & EFW Pipes.

Alloy Steel Pipe P91, ASTM A691 Alloy Steel EFW Pipe, Alloy Steel P91 Seamless Pipes, Seamless Ferritic Alloy-Steel P91 Pipe, P91 Alloy Steel Boiler Steel Pipe Distributor, ASME SA335 Grade P91 Alloy Steel Pipe Supplier in Mumbai, India.


There are two main varieties of ASTM A335 P91 Pipe. There are two types: type 1 and type 2. Type 2 is the most often seen. The material composition contains carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum, which constitutes most of the material. Neminox Steel & Engineering Co. is a major producer of ASTM A335 P91 Pipe, which is available in various sizes and configurations. Further alloying elements are present in minor amounts in the composition, including vanadium, nitrogen, nickel, aluminium, columbium, titanium, and zirconium. The pipes are manufactured in accordance with the A335 standard. However, forged or bored pipes might also fall within A369.


ASTM A335 P91 High Pressure Steel Pipe

Material P91 Pipe is utilized in a variety of applications, including power generation, gas processing equipment, boilers, heaters, and reheater lines, as well as most oil service applications. The preheating of the pipes is required prior to the welding of the pipes. The material must also be cooled to below 100 degrees Celsius after being welded before it can be used. Because of the nature of the material, the P91 Seamless Pipe has a minimum tensile strength of 585MPa and a minimum yield strength of 415MPa at the minimum. The presence of chromium and molybdenum in the P91 Steel Pipe types is primarily responsible for the pipe types' higher strength and corrosion resistance.

They are available in nominal bore diameters ranging from 1/8 inch to 24 inches. In order to accommodate for the various schedules ranging from sch20 to XXS, the outer diameter and wall thicknesses must be varied. The wall thickness of the P91 Chrome Pipe may vary from 2mm to 14mm, and the length can be up to 16000mm. The wall thickness of the P91 Chrome Pipe can range from 2mm to 14mm. Pipes are available in a variety of shapes and sizes, including round, square, rectangular, hydraulic, and other variations. Ends might be plain, bevelled, or threaded. Please do not hesitate to contact us if you need any further information about the ASTM A335 Gr P91 Pipe or for price information.

Global Supplier of High Quality Alloy Steel P91 Seamless Pipe, Alloy Steel UNS K91560 Pipes, A335 P91 Alloy Steel Seamless Pipe, ASTM A335 P91 High Pressure Steel Pipe, Alloy Steel ASTM A335 Grade P91 Seamless Pipe Manufacturer, P91 High Pressure Steel Pipe Exporter in India.

Specification Format of ASME SA335 Grade P91 Alloy Steel Pipe

Size in Inch 1/8NB TO 24NB inch
ASTM Standards ASTM A 335, and ASME SA 335
Type Seamless Pipes
Specialized in Size Large Diameter Size
Outer Dimensions Chart 19.05milimeter – 114.3milimeter
Wall Thickness Chart 2.0milimeter – 14 milimeter
Length in milimeter max 16000milimeter
Schedule Chart Schedule 20 - XXS up to 250 milimeter thk.
Pipe Form Round, Rectangular, Square, Hydraulic Etc.
Length Single, Double Random & Cut to Length.
Pipes & Tube End Plain, Beveled, Treaded.

Equivalent Of P91 AS Hexagonal Pipe

ASTM ASME A335 Gr P91 Equivalent Material JIS UNS
A335 P91 SA335 P91 T91, K90901, X10CrMoVNb9-1, 1.4903 G 3458 K91560

ASTM International BSi - British Standards institute Material
ASTM A335 Gr. P5 Pipe 3604/625 5% Cr 1/2% Mo
ASTM A335 Gr. P9 Pipe 3604/629 9% Cr 1% Mo
ASTM A335 Gr. P11 Pipe 3604/621 1 1/4% Cr 1/2% Mo
ASTM A335 Gr. P12 Pipe 3604/620 1% Cr 1/2% Mo
ASTM A335 Gr. P22 Pipe 3604/622 2 1/4% Cr 1% No

Chemical Properties of ASTM A335 Gr P91 Welded Pipe

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

Mechanical And Physical Properties of Alloy Steel P91 ERW Pipe

Tensile Strength , MPa A335 P91 Yield Strength, MPa Elongation, % A335 P91 Hardness, HB
585 min 415 min 20 min 250 max

Alloy Steel Pipes & Tubes

LSAW Pipe

HSAW Pipe

SSAW Pipe

Heat Treatment Chart of ASTM A335 P91 Pipe

P5, P9, P11, and P22
Grade Chet Heat Treatment Type Normalize Temp Range F [C] Annealing and Tempering Temp Range F [C]
P5 (b,c) Isothermal or Full Anneal
Temper and Normalize ***** 1250 [675]
Subcritical Anneal (P5c only) ***** 1325 - 1375 [715 - 745]
P9 Isothermal or Full Anneal
Temper and Normalize ***** 1250 [675]
P11 Isothermal or Full Anneal
Temper and Normalize ***** 1200 [650]
P22 Isothermal or Full Anneal
Temper and Normalize ***** 1250 [675]
P91 Temper and Normalize 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]
Temper and Quench 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]

Tesile Chart of A335 P91 Material

Seamless Pipe
P5 P9 P11 P22 P91
Tensile Strength, minimum., psi
ksi 60 60 60 60 85
MPa 415 415 415 415 585
Yield Strength, minimum., psi
ksi 30 30 30 30 60
MPa 205 205 205 205 415

Size In Inch for Alloy Steel Grade P91 Pipe

O.D. x Thickness(mm) O.D x Thickness(mm) O.D x Thickness(mm)
38.1 x 3.2 57.0 x 4.9 76.2 x 4.0
38.1 x 4.0 57.0 x 6.3 76.2 x 5.0
38.1 x 6.3 57.0 x 7.9 76.2 x 6.3
42.4 x 3.2 60.3 x 3.2 82.5 x 4.5
42.4 x 4.0 60.3 x 3.6 88.9 x 3.2
44.5 x 3.2 60.3 x 5.0 88.9 x 3.6
44.5 x 6.3 63.5 x 3.2 88.9 x 4.0
48.3 x 3.2 63.5 x 3.6 101.6 x 3.6
48.3 x 3.6 63.5 x 4.0 101.6 x 4.5
50.8 x 4.5 63.5 x 6.3 101.6 x 6.3
51.0 x 3.2 63.5 x 7.9 114.3 x 3.6
51.0 x 3.6 70.0 x 3.2 114.3 x 5.0
51.0 x 6.3 70.0 x 3.6 139.7 x 4.0
57.0 x 3.2 70.0 x 6.3 139.7 x 5.0
57.0 x 3.6 76.2 x 3.6 139.7 x 6.3

Type of A335 P91 Alloy Steel Seamless Pipe

ERW pipe
  • ERW pipe
  • Welded Pipe
  • Welded Pipe
  • Seamless Pipe
  • Seamless Pipe

  • Thickness of Alloy Steel P91 EFW Pipes

    NPS [DN] Designator Tolerance, % from Specified
    Over Under
    1/8 to 2 1/2 [6 to 65] incl., all t/D ratios 20.0% 12.5%
    Above 2 1/2 [65], t/D < or = 5% 22.5% 12.5%
    Above 2 1/2 [65], t/D > 5% 15.0% 12.5%
    (t = Specified Wall Thickness; D = Specified Outside Diameter)

    ASTM A335 Alloy Steel P91 Rectangular Pipes Price per kg

    Size MSL Make ISMT make JSL Make
    1/2" 4,265.71 4,253.35 4,27.06
    3/4" 4,04.12 4,036.76 4,051.47
    1" 3,897.06 3,889.71 3,904.41
    1.25" 3,852.94 3,845.59 3,860.29
    1.5" 3,750.00 3,742.65 3,757.35

    ASTM A335 / SA335 Alloy Steel P91 Seamless Pipes other Available Types

    Alloy Steel P91 Pipes Alloy Steel P91 Seamless Pipe
    ASTM A335 Alloy Steel P91 Pipes Chrome Moly Grade P91 Seamless Pipes
    ASTM A691 Alloy Steel EFW Pipes ASME SA335 Chrome Moly P91 Pipes
    Grade P91 Chrome Moly Seamless Pipes Alloy Steel P91 Seamless Pipes Supplier
    AS Grade P91 Seamless Pipe ASTM A691 Alloy Steel Pipes
    Alloy Steel UNS K91560 Pipes Alloy Steel Gr. P91 High Pressure Steel Pipe
    ASTM A335 Grade P91 Pipe AS P91 Seamless Pipes Stockiest
    Chrome Moly P91 Pipe Exporter ASME SA335 Alloy Steel P91 Pipe Dealer

    Neminox Steel & Engineering Co. offers the wide range of Industrial metal and steel products like pipes, tubes, sheets, plates, rods, bars, weld, flanges, forges & pipe fittings in various materials. Since two decades, we have led as a reliable exporter, supplier, trader and stockist of industrial steels in the world-wide market. We can also provide custom required as per your cut & full length, sizes, hardness and grades at the most competitive prices. Neminox Steel & Engineering Co. is ISO 9001:2015 approved manufacturer in India. We export the standard quality with swift delivery services to countries like USA, Indonesia, Thailand, Mexico, Vietnam, Philippines, Malaysia, Algeria, UK, UAE, Saudi Arabia, Africa, European and Middle East Countries. Just contact us or put your requirement in our Enquiry Form, will get back to you quickly.

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