ASTM A335 P91 pipe suppliers produce these pipes of UNS K91560 standard for different high temperature, high pressure applications. The P91 low alloy steel pipe is one of the high strength, high pressure pipes. The material is stabilized with vanadium, columbium and nitrogen to improve the creep strength. The ASTM A335 Gr P91 ERW Pipes have 585MPa minimum tensile strength and 415MPa minimum yield strength. The highs strength of the material allows it to make pipes with reduced wall thickness by up to 50% compared to other pressure pipe grades in the ASTM A335 specification.
ASTM A335 P91 Alloy Steel Seamless Pipe
P91 Alloy Steel Pipe
The ASTM A335 Grade P91 Pipe has carbon, manganese, phosphorus, sulfur, silicon, 8% chromium, molybdenum, vanadium, nitrogen, nickel, aluminum, columbium, titanium and zirconium. Although the stabilizing agents are added in less than 1% of the total composition, they provide the ASME SA335 P91 material with the added mechanical properties such as the high strength, corrosion resistance and creep resistance. The ASTM A335 P91 Welded Pipe can be welded without the threat of localized corrosion. This is one of the most used grades for elevated temperature with oxidation reduction.
The Tubo A335 P91 products are used in high temperature and high pressure applications such as boilers, oil services, gas processing equipment, power generation plants, heater and reheat lines and so on. The UNS K11522 Seamless Pipe is virtually non-deteriorating, creep resistant like no other pressure pipes and has reduced wall thickness.
Alloy Steel Pipe in Grade
|
ASTM A335 P1/ P2/ P5/ P5b/ P5c/ P9/ P11/ P12/ P15/ P21/ P22/ P23/ P24/ P36/ P91/ P92/ P122/ P911
(with IBR Test Certificate) |
In Length of
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Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths
|
Value Added Service
|
Draw & Expansion as per required Size & Length Heat Treatment, Bending, Annealed, Machining Etc. |
Test Certificate
|
Manufacturer Test Certificate IBR Test Certificate Laboratory Test Certificate from Govt. Approved Lab. & Under Third Party Inspection |
Form | Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes |
End | Plain End, Beveled End, Threaded |
Type | Seamless / ERW / Welded / Fabricated / CDW |
End Protection | Plastic Caps |
Outside Coating | Black Painting, Anti-Corrosion Oil, Galvanised Finish, Finish as per customer Requirements |
Inspection, Test Certificate/ 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 Report, Non Destructive Test Reports, India Boiler Regulations (IBR) Test Certificate |
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 |
Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
585 min | 415 min | 20 min | 250 max |
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation Min (vertical bar specimen )% ① | Elongation Min (round bar specimens )% | Squash | |
---|---|---|---|---|---|---|---|
ASTM A335/A335M-03 "high temperature ferritic alloy steel seamless" | P1, P2 | ≥ 205 | ≥ 380 | 30 | 22 | H | |
P12 | ≥ 220 | ≥ 415 | 30 | 22 | H | ||
P23 | ≥ 400 | ≥ 510 | 20 | 20 | H | ||
P91 | ≥ 415 | ≥ 585 | 20 | 20 | H | ||
Other | ≥ 205 | ≥ 415 | 30 | 22 | H | ||
Note: ① using the vertical bar specimens, the wall thickness of less than 8mm, each reduction 0.8mm, P23, P91 should subtract the base elongation of 1.0%, 1.5%, minus all other grades. | |||||||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation% | Squash | ||
ASTM A500-2001 "Structural carbon steel cold-formed and shaped circular cross-section welded steel pipe and seamless steel pipe." | Grade A | ≥ 228 | ≥ 310 | ≥ 25 | H | ||
Grade B | ≥ 290 | ≥ 400 | ≥ 23 | H | |||
Grade C | ≥ 317 | ≥ 427 | ≥ 21 | H | |||
Grade D | ≥ 250 | ≥ 400 | ≥ 23 | H | |||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation% | Squash | Flaring | |
ASTM A556M-96 "water heater with carbon steel cold drawn seamless steel tubes." | A2 | ≥ 180 | ≥ 320 | ≥ 35 | H | H | |
B2 | ≥ 260 | ≥ 410 | ≥ 30 | H | H | ||
C2 | ≥ 280 | ≥ 480 | ≥ 30 | H | H | ||
Standard | Steel grade | Yield strength | Tensile strength | Elongation (%) ① | |||
JIS G 3473-1988 "Carbon steel cylinder" | STC370 | ≥ 215 | ≥ 370 | ≥ 30 | Note: ① thickness <8mm pipe, elongation is reduced by the minimum thickness at 1mm, to subtract the elongation of 1.5%. | ||
STC440 | ≥ 305 | ≥ 440 | ≥ 10 | ||||
STC510A | ≥ 380 | ≥ 510 | ≥ 10 | ||||
STC510B | ≥ 380 | ≥ 510 | ≥ 15 | ||||
STC540 | ≥ 390 | ≥ 540 | ≥ 20 | ||||
STC590A | ≥ 490 | ≥ 590 | ≥ 10 | ||||
STC590B | ≥ 490 | ≥ 590 | ≥ 15 | ||||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation %① | Squash | ||
JIS G 3467-1988 "furnace with steel." | STF410 | ≥ 245 | ≥ 410 | ≥ 24 | 0.08 | Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. | |
STFA12 | ≥ 205 | ≥ 380 | ≥ 24 | ||||
STFA22 | ≥ 205 | ≥ 410 | ≥ 24 | ||||
STFA23 | ≥ 205 | ≥ 410 | ≥ 24 | ||||
STFA24 | ≥ 205 | ≥ 410 | ≥ 24 | ||||
STFA25 | ≥ 205 | ≥ 410 | ≥ 24 | ||||
STFA26 | ≥ 205 | ≥ 410 | ≥ 24 | ||||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation %① | Squash | ||
JIS G 3462-1988 "boilers, heat exchangers used in steel pipe." | STBA12 | ≥ 205 | ≥ 380 | ≥ 30 | 0.08 | ||
Other | ≥ 205 | ≥ 410 | ≥ 30 | ||||
Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. | |||||||
Standard | Steel grade | Wall thickness mm | Yield strength M Pa | Tensile M Pa | Elongation% ① | Flattening / Flaring | |
JIS G 3461-1988 "boilers, heat exchangers used in carbon steel." | STB340 | ≥ 8 | ≥ 175 | ≥ 340 | ≥ 35 | H | |
STB410 | ≥ 8 | ≥ 255 | ≥ 410 | ≥ 25 | H | ||
STB510 | ≥ 8 | ≥ 295 | ≥ 510 | ≥ 25 | H | ||
Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. | |||||||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation (vertical bar specimen ) %① | Elongation ( round bar specimens )% | Squash | Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. |
JIS G 3456-1988 "high carbon steel pipes." | STPT370 | ≥ 215 | ≥ 370 | ≥ 30 | ≥ 28 | 0.08 | |
STPT410 | ≥ 245 | ≥ 410 | ≥ 2 5 | ≥ 24 | 0.07 | ||
STPT480 | ≥ 275 | ≥ 480 | ≥ 2 5 | ≥ 22 | |||
Standard | Steel grade | Yield strength | Tensile strength | Elongation ( tube sections and longitudinal strips sample) % ① | Elongation (round bar specimens )% | Squashed or bent | |
JIS G 3455-1988 "high carbon steel pipes." | STS370 | ≥ 215 | ≥ 370 | ≥ 30 | ≥ 28 | H | |
STS410 | ≥ 245 | ≥ 410 | ≥ 25 | ≥ 24 | H | ||
STS480 | ≥ 275 | ≥ 480 | ≥ 25 | ≥ 22 | H | ||
Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. | |||||||
Standard | Steel grade | Yield strengthM P a | Tensile M Pa | Elongation ( vertical bar specimen )% ① | Elongation ( round bar specimens )% | Squash | |
JIS G 3454-1988 "pressure pipes carbon steel pipe." | STPG370 | ≥ 215 | ≥ 370 | ≥ 30 | ≥ 28 | 0.08 | |
STPG410 | ≥ 245 | ≥ 410 | ≥ 2 5 | ≥ 24 | 0.07 | ||
Note: ① using vertical bar specimens, the wall thickness of less than 8mm, each reduced 1mm, from the basic minimum elongation shall be subtracted 1.5%. |
ASTM A450
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Hot rolled
|
Outside Diameter, mm
|
Tolerance, mm
|
OD≤101.6
|
+0.4/-0.8
|
||
101.6<OD≤190.5
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+0.4/-1.2
|
||
190.5<OD≤228.6
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+0.4/-1.6
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||
Cold Drawn
|
Outside Diameter, mm
|
Tolerance, mm
|
|
OD<25.4
|
±0.10
|
||
25.4≤OD≤38.1
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±0.15
|
||
38.1<OD<50.8
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±0.20
|
||
50.8≤OD<63.5
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±0.25
|
||
63.5≤OD<76.2
|
±0.30
|
||
76.2≤OD≤101.6
|
±0.38
|
||
101.6<OD≤190.5
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+0.38/-0.64
|
||
190.5<OD≤228.6
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+0.38/-1.14
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||
ASTM A530 & ASTM A335
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NPS
|
Outside Diameter, inch
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Tolerance, mm
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1/8≤OD≤1-1/2
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±0.40
|
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1-1/2<OD≤4
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±0.79
|
||
4<OD≤8
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+1.59/-0.79
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8<OD≤12
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+2.38/-0.79
|
||
OD>12
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±1%
|
ASTM A450
|
Hot rolled
|
Outside Diameter, mm
|
Tolerance, %
|
OD≤101.6, WT≤2.4 |
+40/-0
|
||
OD≤101.6, 2.4<WT≤3.8
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+35/-0
|
||
OD≤101.6, 3.8<WT≤4.6
|
+33/-0
|
||
OD≤101.6, WT>4.6
|
+28/-0
|
||
OD>101.6, 2.4<WT≤3.8
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+35/-0
|
||
OD>101.6, 3.8<WT≤4.6
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+33/-0
|
||
OD>101.6, WT>4.6
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+28/-0
|
||
Cold Drawn
|
Outside Diameter, mm
|
Tolerance, %
|
|
OD≤38.1
|
+20/-0
|
||
OD>38.1
|
+22/-0
|
||
ASTM A530
|
NPS
|
Outside Diameter, inch
|
Tolerance, %
|
1/8≤OD≤2-1/2
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+20.0/-12.5
|
||
3≤OD≤18, WT/OD≤5%
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+22.5/-12.5
|
||
3≤OD≤18, WT/OD>5%
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+15.0/-12.5
|
||
OD≥20, WT/OD≤5%
|
+22.5/-12.5
|
||
OD≥20, WT/OD>5%
|
+15.0/-12.5
|
Size | MSL Make | JSL Make | ISMT make |
---|---|---|---|
1" | 3,897.06 | 3,904.41 | 3,889.71 |
1/2" | 4,264.71 | 4,272.06 | 4,257.35 |
1.25" | 3,852.94 | 3,860.29 | 3,845.59 |
3/4" | 4,044.12 | 4,051.47 | 4,036.76 |
1.5" | 3,750.00 | 3,757.35 | 3,742.65 |
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BAO STEEL- BAO Hydraulic Line Pipes
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JINDAL SAW LTD -JSL Hydraulic Line Pipes
YANGZHOU LONTRIN STEEL TUBE -Lontrin Hydraulic Line Pipes
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SUMITOMO METALS SMTM Hydraulic Line Pipes
TENARIS -TNRS Hydraulic Line Pipes
UNITED SEAMLESS LIMITED -USL Hydraulic Line Pipes
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 |
Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
ASTM A335 P91 Pipe | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
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 | ASME |
---|---|
ASTM A335 Grade P91 Pipe 9% Chrome; 1% Moly + trace elements | SA335 P91 A335 9% Chrome; 1% Moly + trace elements |
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 |