Monel Round Bar

Monel Round Bar Manufacturer, Supplier & Stockist

Monel alloys are known to be very durable, especially in harsh marine environments. Monel round bars have a high level of copper, which increases their resistance to corrosion where there is a solution of brine or sodium chloride. Since most metals normally contain an average of 3.5 percent of salt content by weight in oceans and seas, the problem of corrosion is of great concern to the standard metals. Salt contains chlorine, which is an aggressive corrosion element that can destroy passive corrosion layers and hasten rust development.

But the nickel-copper mixture of Monel produces one of the most robust alloys, which has an incredible performance when subjected to marine conditions. Unifit Fastener Monel square and hex bars are designed in such a manner that they are able to resist these corrosive problems. These alloys have low levels of corrosion, even in high-velocity water (e.g., 10 m/s), and are significantly better than the standard stainless steel alloys, such as 304.

The hygroscopic property of salt causes moisture to be retained on the metal surfaces, and this acts even more to enhance corrosion. However, Monel flat bars are immune to the harmful effects of salty sprays, and because of this, they can be used in offshore and coastal applications in the long term. Also, Monel 400 round bar and monel k500 round bar are superior in the prevention of biofouling and in MIC (microbially induced corrosion), which is why they are safe in pipelines, pumps, valves, and other essential parts of the marine devices.

In projects that need dependable, corrosion-free fasteners and other structural elements, the Unifit Fastener has solutions in Monel alloy, which will perform miraculously in the most extreme conditions at sea.

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Monel Round Bar Material Grades

Specification of ASTM B164 Monel Round Bar

Specification Details
Standards EN, ASME, AISI, BS, JIS, DIN, ASTM
Round Bar Size Thickness: 2 – 100 mm
Tolerance K11, H8, H12, K12, H13, H10, H9, K9, K10, H11, or customized
Forms Available Round, Rod, T-Bars, Channel Bars, Precision Ground Bars, Flat Bars, Square, Blocks, Rings, Hollow, Triangle, Threaded, Hex (A/F), Rectangle, Half Round Bars, Profiles, Billet, Ingot, Forging, I/H Bars
Flat Bar Size Thickness: 3 – 800 mm; Width: 10 – 500 mm
Angle Bar Size 3 × 20 × 20 mm to 12 × 100 × 100 mm
Section Bar Thickness 3 – 12 mm
Channel Bar Size Thickness: 5 – 6 mm; Section: 80 × 40 mm to 150 × 75 mm
Hollow Bar Size OD: 32 – 250 mm; ID: 16 – 200 mm
Rectangle Bar Size 34 × 30 mm to 295 × 1066 mm
Billet Size Diameter: 0.5 – 495 mm
Surface Finish Hot Rolled Pickled, Bright, Sand Blasted, Cold Drawn, Hairline, Polished
Finish Options Cold (Bright) Drawn, Hot Rolled, Slit Rolled Edge, Peeled, Centreless Ground, Hot Rolled Annealed, Rough Turned, Polished, Grinding & Black
Manufacturing Techniques Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar/Rod
Condition Annealed, Tempered, Hardened
Processing Capability Cutting up to 650 mm

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Types of Monel Round Bar

Equivalent Material of ASTM B164 Monel Round Bar

Grade Standard Werkstoff Nr. UNS JIS BS GOST AFNOR EN
Monel 400 ASTM B164 2.4360 N04400 NW 4400 NA 13 МНЖМц 28-2,5-1,5 NU-30M NiCu30Fe
Monel K500 ASTM B164 2.4375 N05500

Chemical Properties of Monel Round Bars

Designation C% Co% Cr% Mo% Ni% V% W% Al% Cu% Nb/Cb/Ta% Ti% Fe% Others
Monel 400 0.12 65.0 32.0 1.5 Mn 1.0
Monel 401 0.10 43.0 53.0 0.75 Si 0.25; Mn 2.25
Monel 404 0.15 52.0–57.0 0.05 balance 0.50 Mn 0.10; Si 0.10; S 0.024
Monel 502 0.10 63.0–67.0 2.5–3.5 balance 0.50 2.0 Mn 1.5; Si 0.5; S 0.010
Monel K500 0.13 64.0 2.8 30.0 0.6 1.0 Mn 0.8
Monel R405 0.15 66.0 31.0

Monel Round Bar Weight Chart

Size (inches/mm) Weight (kg/m) Weight (kg/ft)
1/8" / 3 mm 0.062 0.019
5/32" / 5 mm 0.095 0.029
3/16" / 6 mm 0.141 0.043
7/32" / 7 mm 0.190 0.058
1/4" / 8 mm 0.249 0.076
5/16" / 10 mm 0.387 0.118
3/8" / 11 mm 0.557 0.170
7/16" / 12 mm 0.761 0.232
1/2" / 13 mm 0.994 0.303
9/16" / 14 mm 1.256 0.383
5/8" / 15 mm 1.551 0.473
11/16" / 17 mm 1.880 0.573
3/4" / 18 mm 2.237 0.682
20 mm 2.470 0.753
22 mm 2.979 0.908
24 mm 3.543 1.080
25 mm 3.871 1.180
26 mm 4.170 1.271
27 mm 4.490 1.368
30 mm 5.548 1.691
32 mm 6.314 1.894
35 mm 7.553 2.390
36 mm 7.999 2.438
38 mm 8.903 2.792
40 mm 9.872 3.009
45 mm 12.555 3.807
48 mm 14.205 4.330
50 mm 15.414 4.698
60 mm 22.205 6.768
1" / 25.4 mm 3.00 0.914
2" / 50 mm 15.906 4.848
3" / 75 mm 35.762 10.900
4" / 100 mm 63.340 19.306
5" / 125 mm 99.940 30.461
6" / 150 mm 143.900 43.860
7" / 175 mm 196.000 59.432
8" / 200 mm 254.550 77.586
10" / 250 mm 397.140 121.048

Monel Alloy Hex Bar Sizes

Hex Bar Size (inches) Weight per Ft (lbs) Weight per 12′ (lbs)
3/16″ 0.104 1.248
1/4″ 0.180 2.160
5/16″ 0.290 3.480
3/8″ 0.625 4.920
7/16″ 0.560 6.720
1/2″ 0.740 8.880
9/16″ 0.930 11.160
5/8″ 1.150 13.800
11/16″ 1.390 16.680
3/4″ 1.660 19.920
13/16″ 1.950 23.400
7/8″ 2.300 27.600
15/16″ 2.625 31.200
1″ 2.900 34.800
1-1/16″ 3.300 39.600
1-1/8″ 3.700 44.400
1-1/4″ 4.625 55.200
1-5/16″ 5.100 61.200
1-3/8″ 5.625 67.200
1-7/16″ 6.100 73.200
1-1/2″ 6.625 79.200
1-5/8″ 7.800 93.600
1-3/4″ 9.030 108.360
1-7/8″ 10.400 124.800
2″ 11.800 141.600
2-1/4″ 14.920 179.040
2-3/8″ 16.920 203.040
2-1/2″ 18.420 221.040
3″ 26.530 318.360

Stock List of Monel Round Bar

Diameter (in) Diameter (mm) Size (in fractional) Density (lbs/in³) Weight (lbs/ft) Weight (kg/m)
0.25 6.35 1/4 0.319 0.187 0.2783
0.281 7.1374 9/32 0.319 0.237 0.3527
0.343 8.7122 11/32 0.319 0.354 0.5268
0.375 9.525 3/8 0.319 0.421 0.6265
0.406 10.3124 13/32 0.319 0.495 0.7367
0.437 11.0998 7/16 0.319 0.574 0.8542
0.468 11.8872 15/32 0.319 0.649 0.9658
0.5 12.7 1/2 0.319 0.749 1.1147
0.531 13.4874 17/32 0.319 0.846 1.2590
0.562 14.2748 9/16 0.319 0.948 1.4108
0.593 15.0622 19/32 0.319 1.06 1.5775
0.625 15.875 5/8 0.319 1.17 1.7412
0.656 16.6624 21/32 0.319 1.29 1.9198
0.687 17.4498 11/16 0.319 1.42 2.1132
0.718 18.2372 23/32 0.319 1.55 2.3067
0.75 19.05 3/4 0.319 1.69 2.5151
0.781 19.8374 25/32 0.319 1.83 2.7234
0.812 20.6248 13/16 0.319 1.98 2.9466
0.843 21.4122 27/32 0.319 2.13 3.1699
0.875 22.225 7/8 0.319 2.29 3.4080
0.906 23.0124 29/32 0.319 2.46 3.6610
0.937 23.7998 15/16 0.319 2.63 3.9140
0.968 24.5872 31/32 0.319 2.81 4.1818
1 25.4 1 0.319 3.00 4.4646

Monel Welding Rod Tolerances

Section / Shape Size (mm) Permitted Variation (mm)
Flat (Thickness) < 18 +0 to -0.110
>18 ≤ 30 +0 to -0.130
>30 ≤ 50 +0 to -0.250
>50 ≤ 80 +0 to -0.350
Flat (Width) < 18 +0 to -0.110
>18 ≤ 30 +0 to -0.130
>30 ≤ 50 +0 to -0.160
>50 ≤ 80 +0 to -0.190
>80 ≤ 100 +0 to -0.220
>100 ≤ 130 +0 to -0.350
>130 ≤ 160 +0 to -1.00
>160 ≤ 320 ±1.00
Square & Hexagon ≥6 ≤ 18 +0 to -0.090
>18 ≤ 30 +0 to -0.110
>30 ≤ 50 +0 to -0.130
>50 ≤ 80 +0 to -0.160
>80 ≤ 105 +0 to -0.250
Round ≥6 ≤ 18 +0 to -0.070
>18 ≤ 30 +0 to -0.085
>30 ≤ 50 +0 to -0.100
>50 ≤ 80 +0 to -0.120
>80 ≤ 100 +0 to -0.140

ASME SA160 Monel Round Bar Size Chart

US Bar Bar Size (US) Metric (mm) Bar Size (Metric) Japanese (mm) Bar Size (JP) Canadian / ASTM (mm) Bar Size (CAN/ASTM)
0.250 #2 5 5 6 6 100 10M
0.375 #3 5.5 5.5 10 10 200 15M
0.500 #4 6 6 13 13 300 20M
0.625 #5 7 7 16 16 500 25M
0.750 #6 8 8 19 19 700 30M
0.875 #7 9 9 22 22 1000 35M
1.000 #8 10 10 25 25 1500 45M
1.125 #9 11 11 29 29 2500 55M
1.250 #10 12 12 32 32
1.375 #11 14 14 35 35
1.500 #12 16 16 38 38
1.625 #13 18 18 41 41
1.750 #14 20 20 44 44
1.875 #15 22 22 48 48
2.000 #16 25 25 51 51
2.250 #18 28 28 57 57
32 32
36 36
40 40
44 44
50 50

ASTM B164 Monel Rod Price List

Description Price (INR per unit) Price (USD) Price (EURO)
Nickel Copper Round Bar, Grade Niclal 400 (Monel 400), Dia 12.2 × 3500 mm 1,069 14.50 11.96
Nickel Alloy Round Bar, Grade Monel 400 UNS N04400 869 11.79 9.72
Monel 400 Round Bar (Goods for Re-export, No Ex-Bonding Allowed) 37,404 507.48 418.44
Monel 400 Round Bar (Goods for Re-export, No Ex-Bonding Allowed) 106,270 1,441.82 1,188.84
Nickel Copper Round Bar, Monel 400, Dia 14.28 × 3000 mm H12 1,254 17.01 14.03
Nickel Copper Round Bar, Grade Niclal 400 (Monel 400), Dia 12.2 × 3500 mm 1,190 16.15 13.31
Nickel Alloy Round Bar, Grade Monel [Ni 65%, Cu 32%] 447 6.06 5.00
Round Bar Niclal 400, Dia 12.2 × 3500 mm H12 (Monel 400 ASTM B-164) 1,212 16.44 13.56

Monel Round Bar Stock List

UNS N04400 Monel 400 Rectangular Bars UNS 4400 Monel Polished Bars Stock
Monel 400 Square Bars Bright Monel 400 Grade Bright Bars Cold Drawn
ASTM B164 Alloy 400 Square Bars Annealed Monel 400 UNS N04400 Bright Bars Flat
Monel 2.4360 Threaded Bars M16 Monel 400 Threaded Rods
Alloy 400 Monel 2.4360 Rectangular Bars Cold Drawn Werkstoff 2.4360 Monel Polished Square Bars
Monel 2.4360 Rectangular Bars Polished Monel ASTM B164 Polished Round Bars
2.4360 Monel 400 Threaded Bars M12 Monel 400 ASTM B164 Threaded Bars Stock
Monel UNS N04400 Square Bars UNS N04400 Monel 400 Polished Flat Bars
2.4360 Monel 400 Rectangular Bars Bright Monel Grade 400 Bright Bars Hollow

Applications of Monel Round Bars (ASTM B164) – Unifit Fastener

Monel round bars are renowned for their exceptional corrosion resistance, high strength, and durability in harsh environments. Common applications include:

  • Marine Industry – Ideal for shipbuilding, offshore platforms, seawater piping, valves, and pumps due to high resistance to saltwater corrosion.
  • Chemical Processing – Used in reactors, heat exchangers, tanks, and pipelines for aggressive chemicals.
  • Aerospace – Components exposed to high-stress and corrosive atmospheres.
  • Oil & Gas Industry – Suitable for drilling equipment, valves, and fittings in offshore and onshore operations.
  • Power Plants & Instrumentation – For control rods, shafts, fasteners, and sensors in extreme conditions.
  • High-Temperature Applications – Monel maintains mechanical integrity in elevated temperatures and thermal cycling.

People Ask About Nuts Manufacturer

What is ASTM B164 Monel Round Bar?

ASTM B164 is the standard specification for nickel-copper alloy (Monel) bars. Monel 400 and K500 are the most common grades, offering excellent corrosion resistance and high strength.

What are the common sizes of Monel round bars?

Monel bars are available in diameters from 3 mm (1/8") up to 300 mm (12") and in lengths up to 12 feet or customized as per requirement.

What is Monel used for?

Monel is a nickel-copper alloy used for its excellent corrosion resistance and high strength. It is commonly used in marine, offshore, chemical, oil & gas, and aerospace applications, including pumps, valves, fasteners, heat exchangers, and seawater equipment.

What is an EN8 round bar?

An EN8 round bar is a medium carbon steel known for good strength and machinability. It is widely used in shafts, bolts, studs, gears, and general engineering components and can be heat treated for improved performance.