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ASTM A335 P91 Pipes & Tubes

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Alloy Steel A335 P91 Pipe Manufacturer & Supplier

ASTM A335 P91 Pipes & Tubes

Sachin Steel is a leading manufacturer, exporter, and supplier of premium quality alloy steel A335 P91 pipes, serving diverse industrial applications worldwide. These seamless pipes are engineered in compliance with both national and international standards, ensuring reliable performance even under high-temperature and corrosive service conditions. Designed for the transportation of fluids at elevated pressures, our alloy steel a335 P91 pipe is widely appreciated for their durability, dimensional accuracy, and smooth surface finish.

We specialise in offering a wide range of alloy steel A335 P91 pipe in various sizes, thicknesses, lengths, schedules, and end finishes. Customers can choose from standard specifications or request custom-made solutions tailored to their project requirements. Each pipe is manufactured using superior quality alloy steel, carefully selected to deliver excellent mechanical properties and long service life.

The fabrication process is carried out under the close supervision of skilled professionals who ensure that every pipe meets stringent quality standards. By utilising modern tools and advanced technology, we guarantee flawless production with precise dimensions and excellent finishing. Our quality-focused approach enables us to consistently supply products that exceed client expectations.

With a commitment to competitive pricing and timely delivery, get in touch with our team for alloy steel A335 P91 pipe for critical industrial applications.

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P91 Alloy Steel Pipes, Alloy Steel A335 P91 Pipe Suppliers, ASME SA 335 Chrome Moly P91 Pipes, ASTM A335 Grade P91 High-Pressure Boiler Pipes, Seamless Grade P91 Alloy Steel Pipes, Cr-Mo P91 Seamless Tubes, and Leading Exporter of Cr-Mo Grade P91 Pipes in India.

Table Of Content

What is Alloy Steel A335 P91 Pipe?

Alloy Steel A335 P91 Seamless Pipes are widely recognised for their exceptional strength, durability, and ability to withstand high temperatures as well as corrosive environments. Manufactured using premium-quality alloy steel, these pipes are designed in accordance with national and international standards, ensuring reliability in critical applications. They are commonly used for the transportation of fluids and gases in industries where elevated pressure and thermal resistance are essential.

Available in a wide range of sizes, wall thicknesses, lengths, schedules, and end finishes, ASTM A335 P91 pipes can be supplied in both standard and customised specifications to meet diverse project requirements. The fabrication process is carried out under the strict supervision of skilled experts, using advanced technology and modern equipment. This ensures precise dimensions, smooth surface finishes, and long service life. Their superior mechanical properties make them a preferred choice for power plants, refineries, and petrochemical industries.

Different Types of ASTM A335 P91 Pipes

seamless-pipes

ASTM A335 P91 Seamless Pipe

seamless-tubes

A335 P91 Boiler Pipe

erw

SA 335 Gr P91 Round Pipe

Rectangular Pipe

ASTM A335 P91 Steel Chrome Pipe

Welded Tube

SA335 P91 Chrome Moly Pipe

Square Pipe

ASTM P91 High Pressure Boiler Pipe

Request Quote on Types of ASTM A335 P91 Pipe
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SA335 GR P91 Seamless Pipe, Sch40 P91 Alloy Steel Pipe supplier, ASTM SA335 Gr P91 Pipe, SA335 Grade P91 Chrome Moly Alloy Pipe Supplier, UNS K91560 Chrome Pipe supplier in India, NBR 5603 P91 High Pressure Pipe, Supplier of ASTM A335 GR P91 Welded Pipe.

Specifications for ASTM A335 P91 Alloy Steel Seamless Pipe

Specification ASTM A335 / ASME SA335
Dimension Standard ANSI B36.10
Outside Diameter 19.05mm – 114.3mm
Wall Thickness 2.0mm – 14mm
Type Seamless
Form Round, Square, Rectangular, Oval, Hydraulic, etc.
Length Max 16000mm
Delivery Condition Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Inspection / Test Reports Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Reports, Non Destructive Test Reports
Packing Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customer’s Requests
Specials Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Alloy Steel A335 P91 Pipe

  C Si Mn P S AL Cr Cu Mo N Nb Ni V
1.4903 Min% 0.08   0.30       8.0   0.85 0,030 0,060   0.18
Max % 0.12 0.50 0.60 0,020 0.005 0,040 9.50 0.30 1.05 0,070 0,100 0.30 0.25

ASTM A335 P91 Pipe Equivalent Material

ASTM ASME Equivalent material JIS G 3458 UNS BS DIN ISO ABS NK LRS
A335 P91 SA335 P91 T91, K90901, X10CrMoVNb9-1, 1.4903 K91560

ASTM A335 P91 Pipe Size Chart

O.D.(mm) x Thk(mm) O.D.(mm) x Thk(mm) O.D.(mm) x Thk(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

Alloy Steel A335 P91 Pipe Mechanical Properties

Property Value
Tensile Strength 85,000 psi (585 MPa) minimum
Yield Strength (0.2% offset) 60,000 psi (415 MPa) minimum
Elongation in 2 inches (50 mm) 20% minimum
Hardness 250 HBW / 25 HRC (maximum)

Price List of Alloy Steel A335 P91 Pipe

Sachin Steel offers ASTM A335 P91 Alloy Steel Pipes at competitive prices in Seamless, Welded, ERW, and EFW types. We maintain ready stock in standard sizes and also provide customised options. For the latest price list or stock availability, click on “Request a Quote” and share your requirements.

ASTM A335/ASME SA335 P91 High Pressure Steel Outside Diameter & Tolerance

ASTM A450
Hot rolled
Outside Diameter, mm
Tolerance, mm
OD≤101.6
+0.4/-0.8
101.6＜OD≤190.5
+0.4/-1.2
190.5＜OD≤228.6
+0.4/-1.6
Cold Drawn
Outside Diameter, mm
Tolerance, mm
OD＜25.4
±0.10
25.4≤OD≤38.1
±0.15
38.1＜OD＜50.8
±0.20
50.8≤OD＜63.5
±0.25
63.5≤OD＜76.2
±0.30
76.2≤OD≤101.6
±0.38
101.6＜OD≤190.5
+0.38/-0.64
190.5＜OD≤228.6
+0.38/-1.14
ASTM A530 & ASTM A335
NPS
Outside Diameter, inch
Tolerance, mm
1/8≤OD≤1-1/2
±0.40
1-1/2＜OD≤4
±0.79
4＜OD≤8
+1.59/-0.79
8＜OD≤12
+2.38/-0.79
OD>12
±1%

ASTM A335 P91 Pipe Weight

Size NPS Pipe O.D. Wall Thickness Pipe I.D. Weight per Foot Standard to XXHY Schedule
Pipe #		 Section Modulus Gallon Capacity Per Linear Foot
1/2 0.84 0.109 0.622 0.85 STD 40 .0407 .0158
    0.147 0.546 1.09 XHY 80 .0478 .0122
    0.188 0.464 1.31   160 .0528 .0088
    0.294 0.252 1.72 XXHY   .0577 .0026
3/4 1.05 0.113 0.824 1.13 STD 40 .0705 .0277
    0.154 0.742 1.48 XHY 80 .0853 .0225
    0.219 0.612 1.95   160 .1006 .0153
    0.308 0.434 2.44 XXHY   .1103 .0077
1 1.315 0.133 1.049 1.68 STD 40 .1328 .0449
    0.179 0.957 2.17 XHY 80 .1606 .0374
    0.250 0.815 2.85   160 .1904 .0271
    0.358 0.599 3.66 XXHY   .2136 .0146
1 1/4 1.66 0.140 1.380 2.27 STD 40 .2346 .0777
    0.191 1.278 3.00 XHY 80 .2913 .0666
    0.250 1.160 3.77   160 .3421 .0549
    0.382 0.896 5.22     .4110 .0328
1 1/2 1.90 0.145 1.610 2.72 STD 40 .3262 .1058
    0.200 1.500 3.63 XHY 80 .4118 .0918
    0.281 1.338 4.86   160 .5079 .0730
    0.400 1.100 6.41     .5977 .0494
2 2.375 0.109 2.157 2.64   10 .4205 .1898
    0.154 2.067 3.66 STD 40 .5606 .1743
    0.218 1.939 5.03 XHY 80 .7309 .1534
    0.250 1.875 5.68     .8045 .1434
    0.281 1.813 6.29     .8666 .1344
    0.344 1.687 7.47   160 .9806 .1161
    0.436 1.503 9.04 XXHY   1.1043 .0922
2 1/2 2.875 0.120 2.635 3.53   10 .6870 .2833
    0.203 2.469 5.80 STD. 40 1.0640 .2487
    0.216 2.443 6.14     1.1169 .2435
    0.250 2.375 7.02     1.2468 .2301
    0.276 2.323 7.67 XHY 80 1.3386 .2202
    0.375 2.125 10.02   160 1.6371 .1842
    0.552 1.771 13.71 XXXHY   1.9971 .1280
3 3.50 0.120 3.260 4.34     1.0411 .4336
    0.156 3.188 5.58     1.3122 .4147
    0.172 3.156 6.12     1.4265 .4064
    0.188 3.124 6.66     1.5342 .3984
    0.216 3.068 7.58 STD. 40 1.7241 .3840
    0.250 3.000 8.69     1.9372 .3672
    0.281 2.938 9.67     2.1207 .3521
    0.300 2.900 10.26 XHY 80 2.2253 .3431
    0.438 2.624 14.34   160 2.8774 .2811
    0.600 2.300 18.6 XXHY   3.4243 .2158
3 1/2 4.0 0.120 3.760 4.98   10 1.3776 .5768
    0.226 3.548 9.12 STD. 140 2.3939 .5136
    0.250 3.500 10.02     2.6001 .4998
    0.281 3.438 11.17     2.8562 .4821
    0.318 3.364 12.52 XHY 80 3.1400 .4617
    0.636 2..728 22.87 XXHY   4.8795 .3085
4 4.5 0.120 4.260 5.62   10 1.7612 .7404
    0.156 4.188 7.24     2.2354 .7156
    0.188 4.124 8.67     2.6296 .6942
    0.203 4.094 9.32     2.8173 .6838
    0.219 4.062 10.02     3.0184 .6725
    0.237 4.026 10.80 STD. 40 3.2145 .6613
    0.250 4.000 11.36     3.3611 .6528
    0.281 3.938 12.67   60 3.7021 .6326
    0.312 3.876 13.97     4.0273 .6126
    0.337 3.826 15.00 XHY 80 4.2713 .5972
    0.438 3.624 19.02   120 5.1790 .5361
    0.531 3.438 22.53   160 5.8997 .4822
    0.674 3.152 27.57 XXHY   6.7927 .4054
5 5.563 0.188 5.187 10.80     4.1161 1.0979
    0.219 5.125 12.51     4.7279 1.0716
    0.258 5.047 14.63 STD. 40 5.4500 1.0391
    0.281 5.001 15.87     5.8644 1.0204
    0.312 4.939 17.51     6.4074 .99647
    0.344 4.875 19.19     6.9358 .9696
    0.375 4.813 20.80 XHY 80 7.4300 .9449
    0.500 4.563 27.06   120 9.2534 .8495
    0.625 4.313 32.99   160 10.7976 .7590
    0.750 4.063 38.59 XXHY   12.0954 .6734
6 6.625 0.109 6.407 7.59   5 3.5769 1.6748
    0.134 6.357 9.30   10 4.3475 1.6488
    0.156 6.313 10.79     5.0107 1.6260
    0.188 6.249 12.94     5.9351 1.5937
    0.203 6.219 13.94     6.3804 1.5780
    0.219 6.187 15.00     6.8261 1.5620
    0.250 6.125 17.04     7.6905 1.5306
    0.280 6.065 18.99 STD. 40 8.4958 1.5008
    0.312 6.001 21.06     9.3416 1.4688
    0.344 5.937 23.10     10.111 1.4391
    0.375 5.875 25.05     10.893 1.4082
    0.432 5.761 28.60 XHY 80 12.224 1.3541
    0.500 5.625 32.74     13.711 1.2909
    0.562 5.501 36.43   120 14.9806 1.2346
    0.625 5.375 40.09     16.1821 1.1787
    0.719 5.187 45.39   160 17.8243 1.0977
    0.864 4.897 53.21 XXHY   20.025 .9784
    1.000 4.625 60.13     21.7719 .8727
    1.125 4.375 66.14     23.1237 .7809

Physical Properties of ASTM A335 P91 Pipe

Temperature T
° C / ° F 
(° C / F)
Specific heat J / kgK
(Btu / lb ° F)		Thermal conductivity 
W / mK 
(Btu · in / ft 2 · h · ° F)		Electrical resistance
μΩ · cm 
(Ω circ / ft)		Young’s modulus
kN / mm 2
(10 3 ksi)		Expansion coefficient from 20 ° C to T 
10 -6 / K 
(10 -6 / ° F)
20/68460 (-)26 (-) 218 (-) 
200/392   207 (-)11.3 (-)
400/752   190 (-)12.0 (-)
500/932 30 (-)  12.3 (-)
600/1112    12.6 (-)
650/1202   162 (-)12.7 (-)

Industrial Applications of Alloy Steel A335 P91 Pipe

    • Petrochemical Industry
    • Chemical Industry
    • Oil and Gas Industry
    • Pulp & Paper Indusry
    • Power Plant Industry
    • Food Processing Industry
    • Pharmaceuticals Industry
    • Energy Industry
    • Aerospace Industry
Application Industries

Frequently Asked Questions About ASTM A335 Pipe

P91 pipes are widely used in power plants (boilers, superheaters), petrochemical, oil & gas, refineries, and high-temperature process industries.

P91 seamless pipes are offered from sizes like ½″ to 24″ (DN25 to DN600), wall thicknesses in various schedules (SCH 40, SCH 80, XS, etc.), and end finishes like plain ends (PE) or beveled ends (BE).

ASTM A335 P91 is a high-chromium, molybdenum alloy steel material designed for high-temperature and high-pressure service. It is commonly used to manufacture seamless pipes that provide excellent creep resistance, tensile strength, and oxidation resistance, making it ideal for power plants, boilers, and petrochemical industries.

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