AISI 4140 Pipes are tough, high-strength alloy steel pipes crafted from chromium-molybdenum steel, celebrated for their impressive toughness, wear resistance, and fatigue strength. These pipes are produced using cutting-edge seamless or welded methods, ensuring they have a consistent wall thickness, precise dimensions, and a top-notch surface finish. AISI 4140 Pipes meet international standards, making them perfect for critical applications in industries like oil and gas, petrochemical, automotive, and heavy machinery, where durability, reliability, and high performance under stress are a must.
The chemical makeup of AISI 4140 Pipes includes carbon, chromium, molybdenum, manganese, and silicon. This blend boosts their tensile and yield strength, toughness, hardenability, and resistance to wear and corrosion. Mechanically, these pipes deliver high tensile strength, outstanding impact resistance, fatigue resistance, and dimensional stability. Heat treatment processes like quenching and tempering further enhance their hardness, toughness, and structural integrity, ensuring they perform consistently well under high-pressure and high-stress situations.
| Standard | AISI 4140, ASTM A519 (with IBR Test Certificate) |
| Size | 1/2” NB to 36” NB |
| Thickness | 3-12mm |
| Schedules | SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules |
| Tolerance | Cold drawn pipe: +/-0.1mm
Cold rolled pipe: +/-0.05mm |
| Craft | Cold rolled and Cold drawn |
| Type | Seamless / ERW / Welded / Fabricated |
| available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
| Length | Standard Double & In Cut length also. |
| End | Plain End, Beveled End, Treaded |
| Specialized in | Large Diameter AISI 4140 Pipe |
| Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
| Application | Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
| Element | Content (%) |
|---|---|
| Iron, Fe | 96.785 – 97.77 |
| Chromium, Cr | 0.80 – 1.10 |
| Manganese, Mn | 0.75 – 1.0 |
| Carbon, C | 0.380 – 0.430 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength |
655 MPa |
95000 psi |
| Yield strength |
415 MPa |
60200 psi |
| Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson’s ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 50 mm) |
25.70% |
25.70% |
| Hardness, Brinell |
197 |
197 |
| Hardness, Knoop (converted from Brinell hardness) |
219 |
219 |
| Hardness, Rockwell B (converted from Brinell hardness) |
92 |
92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) |
13 |
13 |
| Hardness, Vickers (converted from Brinell hardness) |
207 |
207 |
| Machinability (based on AISI 1212 as 100 machinability) |
65 |
65 |
| Properties | Metric | Imperial |
|---|---|---|
|
Density |
7.85 g/cm3 |
0.284 lb/in³ |
|
Melting point |
1416°C |
2580°F |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chetak Steel is a major manufacturer and a supplier of premium AISI 4140 Pipes in Hyderabad, the India. 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.
| Standard/ Grade | UNS | Temper | Specification |
|---|---|---|---|
| AISI 4140 Alloy Steel | UNS G41400 | A, N, T | AMS6381 |
| 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 |
| 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 | |||
| &nbsnbsp; | 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 |
AISI 4140 Pipes are commonly used in the manufacturing of hydraulic systems, automotive and aerospace components, structural piping, and high-pressure fluid transport systems. Their unique combination of strength, durability, and resistance to wear and fatigue makes them a go-to choice for industries that need high-performance, long-lasting piping solutions capable of handling extreme operating conditions.
Chetak 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 Hyderabad, India.
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