ASTM A335 P9 Pipe is a chromium molybdenum alloy steel pipe. It is suitable for high temperature services. Hi-tech Metal & Tubes is a manufacturer, stockiest and distributor of these pipes in various ranges.

ASTM A335 P9 Pipe
SA335 P9 Material A335 Gr P9

As one of the leading SA335 P9 Pipes suppliers we manufacture these products for use in oil and gas industries, water lines and other fluid transmission applications. The SA335 Grade P9 Material contains chromium and molybdenum in its composition. This combination makes the pipes be oxidation resistant, high temperature resistant and highly corrosion resistant. There are different making types of these pipes. The electric resistant weld A335 P9 Welded Pipes is the strongest and could be easily welded upon. We manufacture the seamless pipes which are dimensionally precise. The hardness of the ASTM A335 P9 Alloy Steel Pipes is also improved by the addition of the chromium and molybdenum components in the composition. In addition to these depending on the variations, there might be copper, aluminum, boron, vanadium or some other elements in smaller quantities. These make up for the differences in mechanical properties of the different ASTM A335 Grade P9 pipes varieties. Our P9 Seamless Pipes is of high quality and aesthetic appeal and therefore could be used with outdoor applications. We take custom orders for P9 Steel Pipes as well and we welcome your inquiries.


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ASTM A335 P9 Alloy Steels Seamless Pipe surface treatment can be done by phosphating, varnishing, shot impacting, oil-dip, and passivation. Testing and assessment of Alloy Steels A335 P9 is done by flattening test, surface and measurement test, mechanical properties test, hardness test, chemical composition inspection, bending test


SA335 Grade P9 Specification

ASTM A335 P9 Pipes Standard ASTM A335 P9, SA335 P9
SA335 Grade P9 Thickness 3 To 12 Mm
A335 Gr P9 Size 1/2 Inch NB to 36 Inch NB
A335 Gr P9 Pipes Tolerance Cold drawn pipe: +/-0.1 MM
Cold rolled pipe: +/-0.05 MM
P9 Steel Pipes Schedules Schedule 40, 80, 160, XS, XXS
Alloy Steel A335 P9 Type Seamless / ERW / Welded / Fabricated

A335 P9 Pipes Size In MM

Size NPS Pipe O.D. Wall Thickness Pipe I.D. Weight per Foot
1/2 0.84 0.109 0.622 0.85
0.147 0.546 1.09
0.188 0.464 1.31
0.294 0.252 1.72
3/4 1.05 0.113 0.824 1.13
0.154 0.742 1.48
0.219 0.612 1.95
0.308 0.434 2.44
1 1.315 0.133 1.049 1.68
0.179 0.957 2.17
0.250 0.815 2.85
0.358 0.599 3.66
1 1/4 1.66 0.140 1.380 2.27
0.191 1.278 3.00
0.250 1.160 3.77
0.382 0.896 5.22
1 1/2 1.90 0.145 1.610 2.72
0.200 1.500 3.63
0.281 1.338 4.86
0.400 1.100 6.41
2 2.375 0.109 2.157 2.64
0.154 2.067 3.66
0.218 1.939 5.03
0.250 1.875 5.68
0.281 1.813 6.29
0.344 1.687 7.47
0.436 1.503 9.04
2 1/2 2.875 0.120 2.635 3.53
0.203 2.469 5.80
0.216 2.443 6.14
0.250 2.375 7.02
0.276 2.323 7.67
0.375 2.125 10.02
0.552 1.771 13.71
3 3.50 0.120 3.260 4.34
0.156 3.188 5.58
0.172 3.156 6.12
0.188 3.124 6.66
0.216 3.068 7.58
0.250 3.000 8.69
0.281 2.938 9.67
0.300 2.900 10.26
0.438 2.624 14.34
0.600 2.300 18.6
3 1/2 4.0 0.120 3.760 4.98
0.226 3.548 9.12
0.250 3.500 10.02
0.281 3.438 11.17
0.318 3.364 12.52
0.636 2..728 22.87
4 4.5 0.120 4.260 5.62
0.156 4.188 7.24
0.188 4.124 8.67
0.203 4.094 9.32
0.219 4.062 10.02
0.237 4.026 10.80
0.250 4.000 11.36
0.281 3.938 12.67
0.312 3.876 13.97
0.337 3.826 15.00
0.438 3.624 19.02
0.531 3.438 22.53
0.674 3.152 27.57
5 5.563 0.188 5.187 10.80
0.219 5.125 12.51
0.258 5.047 14.63
0.281 5.001 15.87
0.312 4.939 17.51
0.344 4.875 19.19
0.375 4.813 20.80
0.500 4.563 27.06
0.625 4.313 32.99
0.750 4.063 38.59
6 6.625 0.109 6.407 7.59
0.134 6.357 9.30
0.156 6.313 10.79
0.188 6.249 12.94
0.203 6.219 13.94
0.219 6.187 15.00
0.250 6.125 17.04
0.280 6.065 18.99
0.312 6.001 21.06
0.344 5.937 23.10
0.375 5.875 25.05
0.432 5.761 28.60
0.500 5.625 32.74
0.562 5.501 36.43
0.625 5.375 40.09
0.719 5.187 45.39
0.864 4.897 53.21
1.000 4.625 60.13
1.125 4.375 66.14

A335 P9 Welded Pipes Equivalent Material

ASTM ASME JIS G 3458 UNS BS DIN ISO ABS NK LRS
A335 P9 SA335 P9 STPA 26 S50400 3604 P1 629-470 2604 II TS38

ASTM A335 P9 AS Pipes Chemical Analysis

Alloy Steel P9 C Cr Mn Mo P S Si
0.05 – 0.15 0.90 – 1.10 0.30 – 0.60 0.90 – 1.10 0.025 max 0.025 max 0.25 – 1.00

AS A335 P9 Mechanical Characteristics

Tensile Strength, MPa Yield Strength, MPa Elongation
415 min 205 min 30 min