Table of Contents
Introduction
Monel 400 Round Bar, a durable nickel-copper alloy, is renowned for its excellent corrosion resistance and strength. Widely used in marine, chemical, oil, and power industries, it withstands extreme conditions and chloride stress corrosion, making it ideal for components like valves, pumps, and heat exchangers. This article explores the key applications of Monel 400 Round Bars across various demanding sectors.
What is Monel 400 Round Bar?
Monel 400 Round Bar is a solid metal bar crafted from Monel 400, an alloy containing around 63% nickel and 30% copper. This composition provides high durability and resistance to harsh conditions. Monel 400 bars are manufactured through hot or cold rolling, forging, and precision machining, ensuring optimal surface finish and adherence to industry tolerances. These processes make them ideal for oil and gas, chemical processing, and marine applications, where performance and strength in extreme conditions are essential.
What Are the Specifications of Monel 400 Round Bar?
Regarding the chemical composition, corrosion resistance, mechanical strength, and heat treatment of Monel 400 round bar, please click on ‘What is Monel 400 Alloy (UNS N04400)?‘.
Common Types of Monel 400 Round Bar
- ASTM B164 Monel 400 Annealed Round Bar
- ASTM B164 AMS 4675 Black Round Bar
- 4360 Monel 400 Polished Round Bar
- Nickel Alloy 400 Bright Round Bar
- 400 Alloy Round Bar Hot Rolled
- DIN 2.4360 Round Bar Cold Drawn
- Monel UNS N04400 Round Bar
- 1/2 inch Diameter Monel 400 Bright Bar
- 5/32 inch Diameter Monel 400 Bright Bar
- 3/4 inch Diameter Monel 400 Bright Bar
Monel 400 Round Bar Size Chart
| Metric Size | US Bar Size (Diameter) | ASTM/Canadian Size (Diameter) | Japanese Size (Diameter) |
| 5 mm | #2 (0.250 inch) | 10M (100 mm²) | 6 mm |
| 5.5 mm | #3 (0.375 inch) | 15M (200 mm²) | 10 mm |
| 6 mm | #4 (0.500 inch) | 20M (300 mm²) | 13 mm |
| 7 mm | #5 (0.625 inch) | 25M (500 mm²) | 16 mm |
| 8 mm | #6 (0.750 inch) | 30M (700 mm²) | 19 mm |
| 9 mm | #7 (0.875 inch) | 35M (1000 mm²) | 22 mm |
| 10 mm | #8 (1.000 inch) | 45M (1500 mm²) | 25 mm |
| 11 mm | #9 (1.125 inch) | 55M (2500 mm²) | 29 mm |
| 12 mm | #10 (1.250 inch) | – | 32 mm |
| 14 mm | #11 (1.375 inch) | – | 35 mm |
| 16 mm | #12 (1.500 inch) | – | 38 mm |
| 18 mm | #13 (1.625 inch) | – | 41 mm |
| 20 mm | #14 (1.750 inch) | – | 44 mm |
| 22 mm | #15 (1.875 inch) | – | 48 mm |
| 25 mm | #16 (2.000 inch) | – | 51 mm |
| 28 mm | #18 (2.250 inch) | – | 57 mm |
Monel 400 Round Bar Weight Chart
Click Here for Steel Round Bar Weight Calculator
| Size | Kgs / Foot | Kgs / Mtr | Size | Kgs / Foot | Kgs / Mtr | Size | Kgs / Foot | Kgs / Mtr |
| 3mm | 0.017 | 0.055 | 20mm | 0.753 | 2.470 | 3″ | 10.900 | 35.762 |
| 1/8″ | 0.019 | 0.062 | 22mm | 0.908 | 2.979 | 3-1/4″ | 12.800 | 41.996 |
| 5/32″ | 0.029 | 0.095 | 7/8″ | 0.926 | 3.038 | 3-1/2″ | 14.850 | 48.772 |
| 4mm | 0.030 | 0.098 | 24mm | 1.080 | 3.543 | 3-3/4″ | 17.001 | 55.780 |
| 3/16″ | 0.043 | 0.141 | 25mm | 1.180 | 3.871 | 4″ | 19.306 | 63.340 |
| 5mm | 0.047 | 0.154 | 1″ | 1.210 | 3.970 | 4-1/4″ | 21.908 | 72.249 |
| 7/32″ | 0.058 | 0.190 | 26mm | 1.271 | 4.170 | 4-1/2″ | 24.448 | 80.340 |
| 6mm | 0.068 | 0.223 | 27mm | 1.368 | 4.490 | 4-3/4″ | 27.366 | 90.249 |
| 1/4″ | 0.076 | 0.249 | 1-1/8″ | 1.534 | 5.033 | 5″ | 30.461 | 99.940 |
| 7mm | 0.091 | 0.298 | 30mm | 1.691 | 5.548 | 5-1/2″ | 36.690 | 121.000 |
| 5/16″ | 0.118 | 0.387 | 1-1/4″ | 1.924 | 6.349 | 6″ | 43.860 | 143.900 |
| 8mm | 0.120 | 0.398 | 32mm | 1.894 | 6.314 | 6-1/2″ | 51.093 | 167.630 |
| 9mm | 0.152 | 0.498 | 1-3/8″ | 2.303 | 7.550 | 7″ | 59.432 | 196.000 |
| 3/8″ | 0.170 | 0.557 | 35mm | 2.390 | 7.553 | 7-1/2″ | 68.226 | 225.000 |
| 10mm | 0.189 | 0.620 | 36mm | 2.438 | 7.999 | 8″ | 77.586 | 254.55 |
| 11mm | 0.228 | 0.748 | 38mm | 2.792 | 8.903 | 10″ | 121.048 | 397.140 |
| 7/16″ | 0.232 | 0.761 | 1-1/2″ | 2.715 | 8.951 | |||
| 12mm | 0.271 | 0.889 | 40mm | 3.009 | 9.872 | |||
| 1/2″ | 0.303 | 0.994 | 1-5/8″ | 3.200 | 10.449 | |||
| 13mm | 0.318 | 1.043 | 1-3/4″ | 3.712 | 12.179 | |||
| 14mm | 0.368 | 1.207 | 45mm | 3.807 | 12.555 | |||
| 9/16″ | 0.383 | 1.256 | 1-7/8″ | 4.260 | 13.977 | |||
| 15mm | 0.424 | 1.391 | 48mm | 4.330 | 14.205 | |||
| 5/8″ | 0.473 | 1.551 | 50mm | 4.698 | 15.414 | |||
| 16mm | 0.481 | 1.578 | 2″ | 4.848 | 15.906 | |||
| 17mm | 0.543 | 1.791 | 2-1/8″ | 5.475 | 17.963 | |||
| 11/16″ | 0.573 | 1.880 | 2-1/4″ | 6.135 | 20.128 | |||
| 18mm | 0.610 | 2.001 | 60mm | 6.768 | 22.205 | |||
| 3/4″ | 0.682 | 2.237 | 2-3/8″ | 6.838 | 22.435 | |||
| 2-1/2″ | 7.576 | 24.856 | ||||||
| 2-5/8″ | 8.354 | 27.409 | ||||||
| 2-3/4″ | 9.169 | 30.083 |
Monel 400 Round Bar ISO Tolerances
| Tolerance Grade | Diameter Range | Tolerance (Metric) | Tolerance (Imperial) |
| h9 | Up to 10 mm | +0 / -0.052 mm | +0 / -0.002 in |
| 10 – 18 mm | +0 / -0.062 mm | +0 / -0.0024 in | |
| 18 – 30 mm | +0 / -0.074 mm | +0 / -0.0029 in | |
| h11 | Up to 10 mm | +0 / -0.09 mm | +0 / -0.0035 in |
| 10 – 18 mm | +0 / -0.11 mm | +0 / -0.0043 in | |
| 18 – 30 mm | +0 / -0.13 mm | +0 / -0.0051 in | |
| H7/h6 | 10 – 50 mm | +0.021 / -0.010 mm | +0.0008 / -0.0004 in |
| H7/k6 | 10 – 50 mm | +0.018 / +0.009 mm | +0.0007 / +0.0003 in |
| H7/s6 | 10 – 50 mm | +0.015 / +0.002 mm | +0.0006 / +0.0001 in |
Monel 400 Round Bar Surface Finish
| Surface Finish Type | Description | Roughness Average (Ra) |
| Hot Rolled | Standard mill finish with a rough texture | Ra 3.2 – 6.3 µm |
| Cold Drawn | Smooth finish due to cold drawing process | Ra 1.6 – 3.2 µm |
| Polished | Refined, polished surface for high visibility | Ra 0.8 – 1.6 µm |
| Bright Finish | Very smooth, mirror-like finish | Ra < 0.8 µm |
| Black Finish | Dark, unfinished surface, oxide layer from heating | Varies |
| Machined Finish | Achieved by fine machining | Ra 0.4 – 1.6 µm |
What Are the Benefits of Monel 400 Round Bar?
- Outstanding corrosion and alkaline resistance
- Excellent weldability
- High strength over a broad temperature range
- Good ductility
- High-temperature resistance
- Solid thermal conductivity
- Formability
What Are Monel 400 Round Bar Used For?
- Marine hardware
- Shipbuilding
- Marine fixtures
- Offshore oil drilling equipment
- Pumps
- Valves
- Process piping
- Specialty chemicals processing
- Corrosion-resistant tanks and vessels
- Power plants
- Heat exchangers
- Gas processing
- Petroleum Production and Refining Equipment
Conclusion
Monel 400 Round Bar is a reliable choice across industries needing high corrosion resistance, strength, and durability. Its versatile applications in marine, chemical processing, oil and gas, and power generation prove its value in extreme environments. Withstanding high temperatures and chloride stress corrosion, this alloy is ideal for critical components like heat exchangers, valves, and pumps. Contact us today to explore how Monel 400 Round Bar can meet your demanding project needs.
FAQs
What are the key properties of Monel 400 Round Bar?
Monel 400 Round Bar offers exceptional corrosion resistance, high mechanical strength, good ductility, and the ability to withstand a wide range of temperatures. It is also resistant to chloride-induced stress corrosion cracking.
What standards apply to Monel 400 Round Bar?
Monel 400 Round Bar conforms to various standards, including ASTM B164, ASME SB164, and QQ-N-281, ensuring consistent quality and performance.
What is the temperature range for Monel 400 Round Bar applications?
Monel 400 Round Bar maintains its mechanical properties across a broad temperature range, from sub-zero temperatures up to approximately 1,000°F (538°C).
Read More:
What Are Stainless Steel Round Bars Used For?