Marzouk Steel, headquartered in Tunis, Tunisia, is a trusted manufacturer and supplier of high-quality steel products, serving industries that demand performance, reliability, and durability. Among its specialized offerings are Alloy Steel P23 Pipes, designed for high-pressure and high-temperature applications. Manufactured with advanced technology and stringent quality control, these pipes provide consistent strength, long-term reliability, and superior thermal performance. Marzouk Steel ensures that every P23 pipe meets international standards, giving engineers and fabricators confidence for critical systems in power plants, petrochemical facilities, and industrial processing units where safety, efficiency, and longevity are essential.
Alloy Steel P23 Pipes are chromium-molybdenum-nickel alloy steel pipes engineered for exceptional high-temperature strength, creep resistance, and corrosion resistance. Their chemical composition typically includes carbon, chromium, molybdenum, and nickel, which enhance toughness, thermal stability, and mechanical performance. P23 pipes exhibit high tensile and yield strength, excellent fatigue resistance, and durability under continuous high-pressure and high-temperature conditions. They respond effectively to heat treatment, allowing optimization of hardness, strength, and creep resistance, making them ideal for demanding industrial and power generation applications.
| Alloy Steel ASTM A335 P23 Size | : | 1/8NB TO 24NB IN |
| ASTM A335 P23 Alloy Steel Standards | : | ASTM A 335, ASME SA 335, ANSI B36.10 |
| Alloy Steel ASTM A335 P23 Type | : | Seamless |
| ASTM A335 P23 Alloy Steel Pipe Specialized in | : | Large Diameter Size |
| Alloy Steel P23 Pipes Outer Dimensions | : | 19.05mm – 114.3mm |
| ASTM A335 P23 Alloy Steel Pipe Wall Thickness | : | 2.0mm – 14 mm |
| Alloy Steel P23 Pipe Length | : | max 16000mm |
| Alloy Steel P23 Pipes Schedule | : | Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thk. |
| Alloy Steel P23 Pipes Form | : | Round, Square, Rectangular, Hydraulic Etc. |
| ASTM A335 P23 Alloy Steel Pipes Length | : | Single Random, Double Random & Cut Length. |
| Alloy Steel P23 Pipes End | : | Plain End, Beveled End, Treaded |
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % | V, % | Nb, % | B,% | N, % | Al, % | W, % |
| 0.04-0.10 | 0.1-0.6 | 0.03 max | 0.01 max | 0.5 max | 1.9-2.6 | 0.05-0.30 | 0.20-0.30 | 0.02-0.08 | 0.0005-0.006 | 0.03 max | 0.03 max | 1.45-1.75 |
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 510 min | 400 min | 20 min |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Marzouk Steel is a major manufacturer and a supplier of premium Alloy Steel P23 pipe in Tunis, the Tunisia. With specialization in steel solutions, we offer a variety of products including carbon steel, alloy steel, light steel and galvanized steel. Our wide bearing has pipes, pipes, flanges, pipe fittings, forged fittings, sheets and plates. We are famous for our reliable distribution and extraordinary customer service, and are committed to offering high quality steel materials that ensure durability and better performance in different industrial applications. We are committed to skill, and we are your reliable partners for all steel requirements.
| O.D.(mm) x Thickness(mm) | O.D(mm) x Thickness(mm) | O.D(mm) 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 |
| 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 |
| Â | Â | 0.147 | 0.546 | 1.09 | XHY | 80 | .0478 | .0122 |
| Â | Â | 0.188 | 0.464 | 1.31 | Â | 160 | .0528 | .0088 |
| Â | Â | 0.294 | 0.252 | 1.72 | XXHY | Â | .0577 | .0026 |
| 3/4 | 1.05 | 0.113 | 0.824 | 1.13 | STD | 40 | .0705 | .0277 |
| Â | Â | 0.154 | 0.742 | 1.48 | XHY | 80 | .0853 | .0225 |
| Â | Â | 0.219 | 0.612 | 1.95 | Â | 160 | .1006 | .0153 |
| Â | Â | 0.308 | 0.434 | 2.44 | XXHY | Â | .1103 | .0077 |
| 1 | 1.315 | 0.133 | 1.049 | 1.68 | STD | 40 | .1328 | .0449 |
| Â | Â | 0.179 | 0.957 | 2.17 | XHY | 80 | .1606 | .0374 |
| Â | Â | 0.250 | 0.815 | 2.85 | Â | 160 | .1904 | .0271 |
| Â | Â | 0.358 | 0.599 | 3.66 | XXHY | Â | .2136 | .0146 |
| 1 1/4 | 1.66 | 0.140 | 1.380 | 2.27 | STD | 40 | .2346 | .0777 |
| Â | Â | 0.191 | 1.278 | 3.00 | XHY | 80 | .2913 | .0666 |
| Â | Â | 0.250 | 1.160 | 3.77 | Â | 160 | .3421 | .0549 |
| Â | Â | 0.382 | 0.896 | 5.22 | Â | Â | .4110 | .0328 |
| 1 1/2 | 1.90 | 0.145 | 1.610 | 2.72 | STD | 40 | .3262 | .1058 |
| Â | Â | 0.200 | 1.500 | 3.63 | XHY | 80 | .4118 | .0918 |
| Â | Â | 0.281 | 1.338 | 4.86 | Â | 160 | .5079 | .0730 |
| Â | Â | 0.400 | 1.100 | 6.41 | Â | Â | .5977 | .0494 |
| 2 | 2.375 | 0.109 | 2.157 | 2.64 | Â | 10 | .4205 | .1898 |
| Â | Â | 0.154 | 2.067 | 3.66 | STD | 40 | .5606 | .1743 |
| Â | Â | 0.218 | 1.939 | 5.03 | XHY | 80 | .7309 | .1534 |
| Â | Â | 0.250 | 1.875 | 5.68 | Â | Â | .8045 | .1434 |
| Â | Â | 0.281 | 1.813 | 6.29 | Â | Â | .8666 | .1344 |
| Â | Â | 0.344 | 1.687 | 7.47 | Â | 160 | .9806 | .1161 |
| Â | Â | 0.436 | 1.503 | 9.04 | XXHY | Â | 1.1043 | .0922 |
| 2 1/2 | 2.875 | 0.120 | 2.635 | 3.53 | Â | 10 | .6870 | .2833 |
| Â | Â | 0.203 | 2.469 | 5.80 | STD. | 40 | 1.0640 | .2487 |
| Â | Â | 0.216 | 2.443 | 6.14 | Â | Â | 1.1169 | .2435 |
| Â | Â | 0.250 | 2.375 | 7.02 | Â | Â | 1.2468 | .2301 |
| Â | Â | 0.276 | 2.323 | 7.67 | XHY | 80 | 1.3386 | .2202 |
| Â | Â | 0.375 | 2.125 | 10.02 | Â | 160 | 1.6371 | .1842 |
| Â | Â | 0.552 | 1.771 | 13.71 | XXXHY | Â | 1.9971 | .1280 |
| 3 | 3.50 | 0.120 | 3.260 | 4.34 | Â | Â | 1.0411 | .4336 |
| Â | Â | 0.156 | 3.188 | 5.58 | Â | Â | 1.3122 | .4147 |
| Â | Â | 0.172 | 3.156 | 6.12 | Â | Â | 1.4265 | .4064 |
| Â | Â | 0.188 | 3.124 | 6.66 | Â | Â | 1.5342 | .3984 |
| Â | Â | 0.216 | 3.068 | 7.58 | STD. | 40 | 1.7241 | .3840 |
| Â | Â | 0.250 | 3.000 | 8.69 | Â | Â | 1.9372 | .3672 |
| Â | Â | 0.281 | 2.938 | 9.67 | Â | Â | 2.1207 | .3521 |
| Â | Â | 0.300 | 2.900 | 10.26 | XHY | 80 | 2.2253 | .3431 |
| Â | Â | 0.438 | 2.624 | 14.34 | Â | 160 | 2.8774 | .2811 |
| Â | Â | 0.600 | 2.300 | 18.6 | XXHY | Â | 3.4243 | .2158 |
| 3 1/2 | 4.0 | 0.120 | 3.760 | 4.98 | Â | 10 | 1.3776 | .5768 |
| Â | Â | 0.226 | 3.548 | 9.12 | STD. | 140 | 2.3939 | .5136 |
| Â | Â | 0.250 | 3.500 | 10.02 | Â | Â | 2.6001 | .4998 |
| Â | Â | 0.281 | 3.438 | 11.17 | Â | Â | 2.8562 | .4821 |
| Â | Â | 0.318 | 3.364 | 12.52 | XHY | 80 | 3.1400 | .4617 |
| Â | Â | 0.636 | 2..728 | 22.87 | XXHY | Â | 4.8795 | .3085 |
| 4 | 4.5 | 0.120 | 4.260 | 5.62 | Â | 10 | 1.7612 | .7404 |
| Â | Â | 0.156 | 4.188 | 7.24 | Â | Â | 2.2354 | .7156 |
| Â | Â | 0.188 | 4.124 | 8.67 | Â | Â | 2.6296 | .6942 |
| Â | Â | 0.203 | 4.094 | 9.32 | Â | Â | 2.8173 | .6838 |
| Â | Â | 0.219 | 4.062 | 10.02 | Â | Â | 3.0184 | .6725 |
| Â | Â | 0.237 | 4.026 | 10.80 | STD. | 40 | 3.2145 | .6613 |
| Â | Â | 0.250 | 4.000 | 11.36 | Â | Â | 3.3611 | .6528 |
| Â | Â | 0.281 | 3.938 | 12.67 | Â | 60 | 3.7021 | .6326 |
| Â | Â | 0.312 | 3.876 | 13.97 | Â | Â | 4.0273 | .6126 |
| Â | Â | 0.337 | 3.826 | 15.00 | XHY | 80 | 4.2713 | .5972 |
| Â | Â | 0.438 | 3.624 | 19.02 | Â | 120 | 5.1790 | .5361 |
| Â | Â | 0.531 | 3.438 | 22.53 | Â | 160 | 5.8997 | .4822 |
| Â | Â | 0.674 | 3.152 | 27.57 | XXHY | Â | 6.7927 | .4054 |
| 5 | 5.563 | 0.188 | 5.187 | 10.80 | Â | Â | 4.1161 | 1.0979 |
| Â | Â | 0.219 | 5.125 | 12.51 | Â | Â | 4.7279 | 1.0716 |
| Â | Â | 0.258 | 5.047 | 14.63 | STD. | 40 | 5.4500 | 1.0391 |
| Â | Â | 0.281 | 5.001 | 15.87 | Â | Â | 5.8644 | 1.0204 |
| Â | Â | 0.312 | 4.939 | 17.51 | Â | Â | 6.4074 | .99647 |
| Â | Â | 0.344 | 4.875 | 19.19 | Â | Â | 6.9358 | .9696 |
| Â | Â | 0.375 | 4.813 | 20.80 | XHY | 80 | 7.4300 | .9449 |
| Â | Â | 0.500 | 4.563 | 27.06 | Â | 120 | 9.2534 | .8495 |
| Â | Â | 0.625 | 4.313 | 32.99 | Â | 160 | 10.7976 | .7590 |
| Â | Â | 0.750 | 4.063 | 38.59 | XXHY | Â | 12.0954 | .6734 |
| 6 | 6.625 | 0.109 | 6.407 | 7.59 | Â | 5 | 3.5769 | 1.6748 |
| Â | Â | 0.134 | 6.357 | 9.30 | Â | 10 | 4.3475 | 1.6488 |
| Â | Â | 0.156 | 6.313 | 10.79 | Â | Â | 5.0107 | 1.6260 |
| Â | Â | 0.188 | 6.249 | 12.94 | Â | Â | 5.9351 | 1.5937 |
| Â | Â | 0.203 | 6.219 | 13.94 | Â | Â | 6.3804 | 1.5780 |
| Â | Â | 0.219 | 6.187 | 15.00 | Â | Â | 6.8261 | 1.5620 |
| Â | Â | 0.250 | 6.125 | 17.04 | Â | Â | 7.6905 | 1.5306 |
| Â | Â | 0.280 | 6.065 | 18.99 | STD. | 40 | 8.4958 | 1.5008 |
| Â | Â | 0.312 | 6.001 | 21.06 | Â | Â | 9.3416 | 1.4688 |
| Â | Â | 0.344 | 5.937 | 23.10 | Â | Â | 10.111 | 1.4391 |
| Â | Â | 0.375 | 5.875 | 25.05 | Â | Â | 10.893 | 1.4082 |
| Â | Â | 0.432 | 5.761 | 28.60 | XHY | 80 | 12.224 | 1.3541 |
| Â | Â | 0.500 | 5.625 | 32.74 | Â | Â | 13.711 | 1.2909 |
| Â | Â | 0.562 | 5.501 | 36.43 | Â | 120 | 14.9806 | 1.2346 |
| Â | Â | 0.625 | 5.375 | 40.09 | Â | Â | 16.1821 | 1.1787 |
| Â | Â | 0.719 | 5.187 | 45.39 | Â | 160 | 17.8243 | 1.0977 |
| Â | Â | 0.864 | 4.897 | 53.21 | XXHY | Â | 20.025 | .9784 |
| Â | Â | 1.000 | 4.625 | 60.13 | Â | Â | 21.7719 | .8727 |
| Â | Â | 1.125 | 4.375 | 66.14 | Â | Â | 23.1237 | .7809 |
Alloy Steel P23 Pipes are widely used in industries requiring high strength, temperature resistance, and long-term reliability. They are commonly applied in ultra-supercritical boilers, heat exchangers, high-pressure pipelines, and power generation equipment. The pipes are designed to withstand extreme temperatures, high pressures, and corrosive conditions while maintaining structural integrity and performance. Engineers and fabricators rely on P23 pipes for critical applications in power plants, petrochemical industries, and high-performance industrial systems. Their combination of toughness, thermal stability, and creep resistance ensures efficient, safe, and long-lasting operation in demanding environments.
Marzouk Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Tunis, Tunisia.
Copyright 2025 Marzouk Steel. All rights reserved
