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ASTM A335 P91 Pipe

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SA335 gr.P91 Seamless Pipe & Sch40 P91 Alloy Steel Pipe supplier

SA335 P91 Alloy Steel Pipe is made up of carbon, manganese, phosphorus, sulfur, silicon, 8% chromium, molybdenum, vanadium, nitrogen, nickel, aluminum, columbium, titanium and zirconium in the composition. The high chromium content and the other alloy elements in the composition make the ASTM A335 P91 Pipe is stronger and corrosion resistant. The pipe has 585MPa minimum tensile strength and 425 MPa minimum yield strength. The material has good corrosion resistance, temperature resistance and pressure capacities. The pipe could be made as ERW, EFW or welded or fabricated. The seamless pipes are more dimensionally accurate that the A335 P91 Welded Pipe and are used in precision applications.

ASTM A335 P91 Pipe
ASTM A335 P91 Pipe
SA335 gr.P91 Seamless Pipe
SA335 gr.P91 Seamless Pipe
Sch40 P91 Alloy Steel Pipe
Sch40 P91 Alloy Steel Pipe

View latest Alloy Steel P91 Square Pipe & ASTM SA335 Gr P91 Pipe price list ex Kolkata

There are different pipe ends such as the beveled, plain and treaded end types. The pipes also come in square, rectangular and hydraulic types in addition to the round pipes. The pipes can be cold rolled and cold drawn. There are different coating materials available for the ASTM A335 P91 Alloy Steel Pipe and the dimensions vary. The pipes could range from ½ inches to 36 inches in nominal bore size, the wall thickness could range up to 250mm with schedules ranging up to XXS and heavier and the lengths can be single random, double random or custom cut to length sizes. The applications of the Sch40 P91 Alloy Steel Pipe are mostly in the power generation, gas processing, oil services, petrochemical plants, boilers and in the heater and reheater applications.

Table of Contents


Material Specification of ASTM A335 P91 Pipe

Specifications A335 / SA335
Schedule Chart Sch 5, Sch 10, Sch 40, Sch 80, Sch 80S, Sch 160, XXS, XS
Standard DIN, ASTM, AISI, EN, JIS, GB, ASME
Size range 5.0 milimeter - 1219.2 milimeter
Thickness 0.3milimeter – 50 milimeter
Outer Diameter Sizes up to 12” NB, 6.00 milimeter Other Daimeter up to 250 milimeter Other Daimeter
Type Seamless / Fabricated / Welded / ERW / EFW / DOM / CDW / CEW Pipes
Export to Thailand, Indonesia, Brazil, Singapore, Korea, Egypt, Ireland, Iran, Spain, Oman, Dubai, Saudi Arabia, USA, Ukraine, Canada, India, Peru, etc
Form Hollow, Coiled, Hydraulic, Square, Round, Rectangular, “U” Shape, Straight Pipes etc.
Sizes (Welded) 5.0 milimeter - 1219.2 milimeter
End Plain End, Beveled End, Treaded.
Finish Annealed & Pickled,Polished, Bright & Annealed, etc
Length Double Random, Single Random, Cut length

Prices of SA335 gr.P91 Seamless Pipe

Price list of SA335 gr.P91 Seamless Pipe SA335 gr.P91 Seamless Pipe Price in India (INR) SA335 gr.P91 Seamless Pipe Price in USD SA335 gr.P91 Seamless Pipe Price in UAE Dirham

ALLOY STEEL PIPES ASTM/ASME SA335 GR.P91 OD660.4MMX25.4MM

 INR 233 3.17 USD 11.66 UAE Dirham

For more ASTM A335 P91 Pipe price click here

Alloy Steel Grade P91 Seamless Pipe Size Chart In Mm

NB Size OD 40S 5S 10S S10 S20 S40 S60 XS/80S S80 S100 S120 S140 S160 XXS
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
1/8 10.29 1.2 1.73 2.41
1/4 13.72 1.7 2.24 3.02
3/8 17.15 1.7 2.31 3.2
15 1/2 21.34 2.8 1.7 2.1 2.77 3.73 3.73 4.78 7.47
20 3/4 26.67 2.9 1.7 2.1 2.87 3.91 3.91 5.56 7.82
25 1 33.4 3.4 1.7 2.8 3.38 4.55 4.55 6.35 9.09
32 1 1/4 42.16 3.6 1.7 2.8 3.56 4.85 4.85 6.35 9.7
40 1 1/2 48.26 3.7 1.7 2.8 3.68 5.08 5.08 7.14 10.2
50 2 60.33 3.9 1.7 2.8 3.91 5.54 5.54 9.74 11.1
65 2 1/2 73.03 5.2 2.1 3.1 5.16 7.01 7.01 9.53 14
80 3 88.9 5.5 2.1 3.1 5.49 7.62 7.62 11.1 15.2
90 3 1/2 101.6 5.7 2.1 3.1 5.74 8.08 8.08
100 4 114.3 6 2.1 3.1 6.02 8.56 8.56 11.1 13.5 17.1
125 5 141.3 6.6 2.8 3.4 6.55 9.53 9.53 12.7 15.9 19.1
150 6 168.3 7.1 2.8 3.4 7.11 10.97 11 14.3 18.3 22
200 8 219.1 8.2 2.8 3.8 6.4 8.18 10.3 12.7 12.7 15.1 19.3 20.6 23 22.2
250 10 273.1 9.3 3.4 4.2 6.4 9.27 12.7 12.7 15.1 19.3 21.4 25.4 28.6 25.4
300 12 323.9 9.5 4 4.6 6.4 10.3 14.3 12.7 17.5 21.4 25.4 28.6 33.3 25.4
350 14 355.6 9.5 4 4.8 6.4 7.9 11.1 15.1 12.7 19.1 23.8 27.8 31.8 35.7
400 16 406.4 9.5 4.2 4.8 6.4 7.9 12.7 16.7 12.7 21.4 26.2 31 36.5 40.5
450 18 457.2 9.5 4.2 4.8 6.4 7.9 14.3 19.1 12.7 23.8 29.4 34.9 39.7 45.2
500 20 508 9.5 4.8 5.5 6.4 9.5 15.1 20.6 12.7 26.2 32.5 38.1 44.5 50
550 22 558.8 9.5 4.8 5.5 6.4 9.5 22.2 12.7 28.6 34.9 41.3 47.6 54
600 24 609.6 9.5 5.5 6.4 6.4 9.5 17.5 24.6 12.7 31 38.9 46 52.4 59.5
650 26 660.4 9.5 7.9 13 12.7
700 28 711.2 9.5 7.9 13 12.7
750 30 762 9.5 6.4 7.9 7.9 13 12.7
800 32 812.8 9.5 7.9 13 17.5 12.7
850 34 863.6 9.5 7.9 13 17.5 12.7
900 36 914.4 9.5 7.9 13 19.1 12.7

Finding genuine Alloy Steel Grade P91 Seamless Pipe suppliers? KNPC and Saudi Aramco approved supplier of P91 Low Alloy Steel Pipe in India

SA335 P91 Pipes Elongation Requirements

Calculated Minimum Elongation Values
Elongation in 2 in. or 50 mm, min %
Wall Thickness P5, P9, P11, P22 P91
in. mm Longitudinal Transverse Longitudinal
5/16 (0.312) 8 30 20 20
9/32 (0.281) 7.2 28 19 19
1/4 (0.250) 6.4 27 18 18
7/32 (0.219) 5.6 26 17
3/16 (0.188) 4.8 24 16
5/32 (0.156) 4 22 15
7/8 (0.125) 3.2 21 14
3/32 (0.094) 2.4 20 13
1/18 (0.062) 1.6 18   12

P91 Alloy Steel EFW Pipe 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%

Alloy Steel P91 Welded Pipes Hardness

Hardness ≤ 250HB
Check Pressure Rating of SA335 Gr.p91 Welded Pipe & Dimensons of ASTM A335 p91 pipe

Tempering Temperature Range of SA 335 Grade P91 Pipe

Tempering Temperature Range 1350-1470 F [730 – 800 C]

ASTM A335 P91 Alloy Steel Pipe Wall Thickness

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)

Weight Chart of P91 Chrome Moly Pipe

Size NPS O.D. Wall Thickness I.D. Weight per Foot Standard to XXHY Schedule
#		 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
Refer Sizes & Thickness of SA335 p91 material & P91 Alloy Steel EFW Pipe

Size Chart of A335 P91 Chrome Pipe

NB Size OD 40S 5S 10S S10 S20 S40 S60 XS/80S S80 S100 S120 S140 S160 XXS
mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm
1/8 10.29 1.2 1.73 2.41
1/4 13.72 1.7 2.24 3.02
3/8 17.15 1.7 2.31 3.2
15 1/2 21.34 2.8 1.7 2.1 2.77 3.73 3.73 4.78 7.47
20 3/4 26.67 2.9 1.7 2.1 2.87 3.91 3.91 5.56 7.82
25 1 33.4 3.4 1.7 2.8 3.38 4.55 4.55 6.35 9.09
32 1 1/4 42.16 3.6 1.7 2.8 3.56 4.85 4.85 6.35 9.7
40 1 1/2 48.26 3.7 1.7 2.8 3.68 5.08 5.08 7.14 10.2
50 2 60.33 3.9 1.7 2.8 3.91 5.54 5.54 9.74 11.1
65 2 1/2 73.03 5.2 2.1 3.1 5.16 7.01 7.01 9.53 14
80 3 88.9 5.5 2.1 3.1 5.49 7.62 7.62 11.1 15.2
90 3 1/2 101.6 5.7 2.1 3.1 5.74 8.08 8.08
100 4 114.3 6 2.1 3.1 6.02 8.56 8.56 11.1 13.5 17.1
125 5 141.3 6.6 2.8 3.4 6.55 9.53 9.53 12.7 15.9 19.1
150 6 168.3 7.1 2.8 3.4 7.11 10.97 11 14.3 18.3 22
200 8 219.1 8.2 2.8 3.8 6.4 8.18 10.3 12.7 12.7 15.1 19.3 20.6 23 22.2
250 10 273.1 9.3 3.4 4.2 6.4 9.27 12.7 12.7 15.1 19.3 21.4 25.4 28.6 25.4
300 12 323.9 9.5 4 4.6 6.4 10.3 14.3 12.7 17.5 21.4 25.4 28.6 33.3 25.4
350 14 355.6 9.5 4 4.8 6.4 7.9 11.1 15.1 12.7 19.1 23.8 27.8 31.8 35.7
400 16 406.4 9.5 4.2 4.8 6.4 7.9 12.7 16.7 12.7 21.4 26.2 31 36.5 40.5
450 18 457.2 9.5 4.2 4.8 6.4 7.9 14.3 19.1 12.7 23.8 29.4 34.9 39.7 45.2
500 20 508 9.5 4.8 5.5 6.4 9.5 15.1 20.6 12.7 26.2 32.5 38.1 44.5 50
550 22 558.8 9.5 4.8 5.5 6.4 9.5 22.2 12.7 28.6 34.9 41.3 47.6 54
600 24 609.6 9.5 5.5 6.4 6.4 9.5 17.5 24.6 12.7 31 38.9 46 52.4 59.5
650 26 660.4 9.5 7.9 13 12.7
700 28 711.2 9.5 7.9 13 12.7
750 30 762 9.5 6.4 7.9 7.9 13 12.7
800 32 812.8 9.5 7.9 13 17.5 12.7
850 34 863.6 9.5 7.9 13 17.5 12.7
900 36 914.4 9.5 7.9 13 19.1 12.7

List of Sch40 P91 Alloy Steel Pipe Types

Alloy Steel P91 Square Pipe
Alloy Steel P91 Square Pipe
ASTM SA335 Gr P91 Pipe
ASTM SA335 Gr P91 Pipe
Alloy Steel Grade P91 Seamless Pipe
Alloy Steel Grade P91 Seamless Pipe
P91 Low Alloy Steel Pipe
P91 Low Alloy Steel Pipe
SA335 Gr.p91 Welded Pipe
SA335 Gr.p91 Welded Pipe
SA335 p91 material
SA335 p91 material
P91 Alloy Steel EFW Pipe
P91 Alloy Steel EFW Pipe
ASTM A335 P91 chrome moly pipe
ASTM A335 P91 chrome moly pipe
P91 Seamless Pipe
P91 Seamless Pipe
ASTM A335 P91 Alloy Steel Pipe
ASTM A335 P91 Alloy Steel Pipe
ASTM A335 P91 Welded Pipes, Size: 1/2 Inch, 3/4 Inch, 1 Inch
ASTM A335 P91 Welded Pipes, Size: 1/2 Inch, 3/4 Inch, 1 Inch
Round ASTM A335 P91 UNS K91560 Alloy Steel ERW Pipes
Round ASTM A335 P91 UNS K91560 Alloy Steel ERW Pipes
1/2inch Alloy Steel ASTM A335 P91 Seamless Steel Pipes
1/2inch Alloy Steel ASTM A335 P91 Seamless Steel Pipes
ASME SA335 p91 24 inch hot rolled seamless steel pipe
ASME SA335 p91 24 inch hot rolled seamless steel pipe
4 Inch Schedule 40 Alloy ASTM A335 p91 Seamless Steel Pipe
4 Inch Schedule 40 Alloy ASTM A335 p91 Seamless Steel Pipe
3
3" SCH80 ASTM a335 p91 material alloy pipe

Composition Standard of Alloy Steel P91 Square 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 Strength of ASTM SA335 Gr P91 Pipe

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

P91 Low Alloy Steel 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

View our Stockist and Distributors in below countries

ASTM A335 / A335m P91 high temperature seamless pipe Germany, Czechia, Thailand, Malaysia
SA 335 GR P91 Pipe Sch 60 Italy, Chile, Iran, Singapore
ASTM A335 P91 Welded Pipes, Size: 1/2 Inch, 3/4 Inch, 1 Inch Indonesia, Dammam -KSA, Philippines, Belgium
ASME SA335 P91 Pipe For Oil and Gas Industry Malaysia, Philippines, Canada, Singapore
Astm A335 P91 Schedule 80 Pipe South Africa, Bahrain, Singapore, Singapore
ASME SA335 Grade P91 Alloy Steel Pipe South Korea, Singapore, NY 12203 (USA), Malaysia
1.5mm Thick A335 P91 Material USA, Malaysia, Bangladesh, Finland
3 Inch SA335 P91 Pipe Japan, Europe, Romania, Malaysia
Black ASTM A335 P91 Alloy Pipes, 3 Mm Canada, UK, Poland, Ellington -United States
ASTM A335 Grade P91 Boiler Steel Pipe Spain, Egypt, Mexico, UK
2 inch Black P91 Alloy Steel Seamless Pipes Colombia, Sweden, Malaysia, China
DN300 ASTM A335 P91 seamless cracked pipes Taiwan, Malaysia, Los Alamos -Mexico, Philippines
ASME SA335 p91 sch40 seamless round pipe Malaysia, Netherlands, Russia, Dubai
ASTM a355 p91 pipes 1/2inch to 24 inch SCh 40 SCH 80 SCH 120 France, Qatar, Europe, Thailand
UNS K11522 High Pressure Pipe Australia, Philippines, UK, Nigeria
dn900 schedule 80 astm a335 p91 pipe Malaysia, Oman, Hong Kong, UAE
alloy steel p91 material seamless pipe size sch80 6 inch Saudi Arabia (KSA), South Africa, Kuwait, Brazil
ANSI B16.5 ASTM A335 Alloy Steel P91 Rectangular Pipes Europe, United Kingdom -UK, Malaysia, UAE
Large Diameter Steel Grade P91 Pipe Sleeve Turkey, United Arab Emirates (UAE), Norway, Malaysia