Monel 400 Fasteners – Alloy 400 / UNS N04400 Fasteners Supplier & Exporter
Table of Content
- Introduction to Monel 400 Fasteners
- ASTM F467, ASME SF 467 & ASTM B164 Specifications
- Chemical Properties of Monel 400 Fasteners
- Mechanical Properties of Alloy UNS N04400 Fasteners
- 400 Monel Alloy Fasteners Equivalent Grades
- Available Types of Monel 400 Fasteners
- Size Range & Dimensions
- Manufacturing Standards & Thread Types
- Monel 400 Fasteners Applications & Industries Served
- Testing of Monel 400 Fasteners
- Frequently Asked Questions
Kalpataru piping solutions is a reliable manufacturer, exporter, and world supplier of Monel 400 fasteners in India, which provides high-quality and corrosion resistant fasteners. The Monel 400 hex bolts, UNS N04400 fasteners, and DIN 2.4360 studs are made of premium-grade UNS N04400 / WNR 2.4360 alloy, which provides excellent corrosion performance in corrosive media like seawater, acids, alkalis and other harsh environments because of the nature of Monel 400. Being one of the largest manufacturers of Monel 400 fasteners in Mumbai, we are distributors of marine quality Monel fasteners, and Monel bolts that are resistant to corrosion across the globe.
We have complete line of ASTM F467 Monel 400 fasteners, Monel 400 nuts, bolts, screws, washers, studs and custom machined fasteners, all manufactured to high international standards such as ASTM B164, ASTM F467, ASTM F468 and ASME SF467. These elements offer great dimensional precision, high tensile strength, and high mechanical stability at high fabricability. Stocks on hand that can be delivered instantly at our plant in Mumbai. You will be able to investigate our entire collection of Monel products such as the pipes, tubes, flanges and many others. To look at other related fasteners, visit our Fasteners category.
Introduction to Monel 400 Fasteners
Monel 400 Fasteners are manufactured using a high quality nickel-copper alloy (UNS N04400 / WNR 2.4360) with the ability to provide exceptional corrosion resistance, good mechanical properties, good fabricability and service life of 25-35 years in severe environments. The alloy is particularly designed to resist extreme chemical exposures which makes it suitable in applications that have high demands such as marine, chemical processing, petrochemical, offshore, oil and gas, and generation of power in power plants. Monel 400 has a mechanical integrity between -30°F to 1000°F (-34°C to 538°C) and sub-zero and high temperature service. They come in a large variety of sizes, M3 to M56, 3/16 inch to 2 inch, they may also be ordered in custom lengths between 3 mm to 200 mm to suit the requirements of a particular project. HS Code: 73181500 when filling in the customs and export documentations.
Monel 400 Material Compounds and Mechanical Properties.
Monel 400 material, a nickel-copper alloy (with an average of 63% and 28%, respectively), offers a compromise of strength and corrosion behavior. Minor levels of iron, manganese and silicon are also present in the alloy and they lend mechanical strength. The composition gives a melting point of approximately 1350°C and a material density of approximately 8.8 g/cm 3, which is high as compared to most of the conventional austenitic stainless steels. These screws provide tensile strength of approximately 550 Mpa and yield strength of approximately 240 Mpa and thus they can be used in higher stress and demanding applications.
Monel 400 vs. Monel K500 – Material Comparison
Understand the key material differences between Monel 400 and Monel K500 for corrosion-resistant fastener selection.
| Property | Monel 400 | Monel K500 |
| Base Alloy | Nickel-Copper (UNS N04400) | Nickel-Copper with Titanium & Aluminum (UNS N05500) |
| Strength | Good | Higher (due to precipitation hardening) |
| Corrosion Resistance | Excellent | Excellent (slightly improved in some conditions) |
| Applications | Chemical, marine, acid service | Marine, aerospace, oil & gas |
| Heat Treatment | Not required | Requires specific heat treatment |
ASTM F467, ASME SF 467 & ASTM B164 Specifications
Monel 400 fasteners are manufactured to conform to ASTM F467, ASTM B164, and ASTM F468 requirements, which provide quality performance in high-performance critical applications.Their size and tolerance are also controlled by internationally accepted standards like DIN, ASTM and BS that ensure consistency, dependability and interchangeability of different industrial systems.
Detailed Specification of Monel Alloy 400 Fasteners
| Specifications | ASTM F467, ASME SF467, ASTM B164, ASTM F468, ASTM B865-04 |
| Standards | ASTM, ASME, DIN, ISO, BS, JIS, IS, GB, UNI |
| Size Range | Metric: M2, M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45, M48, M52, M56 to M160 | Imperial: 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″, 1-1/2″, 1-5/8″, 1-3/4″, 2″, 2-1/4″, 2-1/2″, 3″, 4″ | Custom Sizes Available |
| Length | 3 mm to 200 mm (Standard) | Up to 1500 mm (Custom CNC Machined) |
| Fastener Types | Bolts, Nuts, Screws, Washers, Studs, Threaded Rods, Pins, Rivets, U-Bolts, Eye Bolts |
| DIN Standards | DIN 931, DIN 933, DIN 934, DIN 125, DIN 127, DIN 912, DIN 913, DIN 975, DIN 976, DIN 985, DIN 6923, DIN 7984, DIN 9021 |
| ISO Standards | ISO 4014, ISO 4017, ISO 4032, ISO 4033, ISO 4035, ISO 4762, ISO 7089, ISO 7040, ISO 7092 |
| BS Standards | BS 1768, BS 1769, BS 2470, BS 3692, BS 4168, BS 4320, BS 4464 |
| ANSI/ASME Standards | ASME B18.2.1, B18.2.2, B18.3, B18.5, B18.6.3, ANSI B18.2.4.1M, ANSI B18.2.4.2M |
| Thread Types | UNC (Unified Coarse), UNF (Unified Fine), BSW (British Standard Whitworth), BSF (British Standard Fine), METRIC, 8UN, NPT, NPTF |
| Thread Pitch | Coarse Thread, Fine Thread (as per standard or custom requirement) |
| Manufacturing Process | Hot Forging (M24-M100), Cold Forging (M2-M24), CNC Machining (Custom sizes up to 4″ diameter) |
| Scope of Manufacture | Hot Forged: up to M36 / 1-1/2″ Dia, up to 1100mm length | CNC Machined: up to M100 / 4″ Dia, up to 1500mm length |
| Head Drive Types | Hex, Phillips, Slotted, Phillips/Slot Combo, Six-Lobe (Torx), Socket (Allen) |
| Bolt Head Shapes | Hex, Square, Round, Pan, Flat, Truss, Button, Oval, Countersunk |
| Bolt Neck Types | Square, Triangular, Hex, Knurled, Plain |
| Stud End Types | Sheared, Chamfered, Flat, Rounded, Saw Cut, Double End, Tap End |
| HS Code | 73181500 |
| Form Available | Round, Square, Hex, Threaded as per Gauge |
Chemical Properties of Monel 400 Fasteners
| Element | Content (%) |
| Nickel (Ni) | 63.00 min |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | 2.5 max |
| Manganese (Mn) | 2.0 max |
| Carbon (C) | 0.3 max |
| Silicon (Si) | 0.5 max |
| Sulfur (S) | 0.024 max |
Mechanical Properties of Alloy UNS N04400 Fasteners
| Property | Metric Value | Imperial Value |
| Tensile Strength (Annealed) | 517-620 MPa | 75-90 ksi |
| Yield Strength (0.2% Offset) | 172-345 MPa | 25-50 ksi |
| Elongation | 35-48% (in 2″) | 35-48% |
| Hardness | 110-150 HB (Brinell) | 60-85 HRB (Rockwell B) |
| Density | 8.80 g/cm³ | 0.318 lb/in³ |
| Melting Point | 1300-1350°C | 2370-2460°F |
| Modulus of Elasticity | 179 GPa | 26000 ksi |
| Poisson’s Ratio | 0.32 | 0.32 |
| Impact Strength (Charpy) | 150-220 ft·lb | 200-300 J |
| Impact Strength (Izod) | 75-120 ft·lb | 100-160 J |
| Temperature Range | -34°C to 538°C | -30°F to 1000°F |
| Service Life (Typical) | 25-35 years | – |
400 Monel Alloy Fasteners Equivalent Grades
| Standard | Grade Designation |
| UNS (USA) | N04400 |
| Werkstoff Nr. (Germany) | 2.4360 |
| BS (UK) | NA 13 |
| AFNOR (France) | NU-30M |
| JIS (Japan) | NW 4400 |
| GOST (Russia) | МНЖМц 28-2,5-1,5 |
| EN (Europe) | NiCu30Fe |
Available Types of Monel 400 Fasteners
Monel 400 Bolts
- Hex Bolts
- Heavy Hex Bolts
- Square Bolts
- Eye Bolts & U Bolts
- Flange Bolts
- Carriage Bolts
- Lag Bolts
- Stud Bolts
Monel 400 Nuts
- Hex Nuts
- Heavy Hex Nuts
- Square Nuts
- Coupling Nuts
- Lock Nuts / Nyloc Nuts
- Wing Nuts
- Cap Nuts / Acorn Nuts
- T-Nuts & Panel Nuts
Monel 400 Screws
- Socket Head Cap Screws
- Hex Cap Screws
- Socket Set Screws
- Machine Screws
- Self-Tapping Screws
- Self-Drilling Screws
- Wood Screws
- Shoulder Screws
Monel 400 Washers & Studs
- Flat Washers (Plain)
- Spring / Lock Washers
- Fender Washers
- Double End Studs
- Fully Threaded Rods
- Tie Bars
- Tap End Studs
Size Range & Dimensions
- Metric Sizes: M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45, M48, M52, M56.
- Imperial Sizes: 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″, 1-3/8″, 1-1/2″, 1-5/8″, 1-3/4″, 1-7/8″, 2″.
- Customization: Non-standard sizes and lengths manufactured as per drawing/sample.
Manufacturing Standards & Thread Types
| Standard Category | Specifications |
| DIN Standards | DIN 931, DIN 933, DIN 934, DIN 912, DIN 975, DIN 976, DIN 125, DIN 127, DIN 580, DIN 603, DIN 985, DIN 6923, DIN 7984, DIN 9021 |
| ISO Standards | ISO 4014, ISO 4017, ISO 4032, ISO 4033, ISO 7089, ISO 4762, ISO 7040, ISO 7092, ISO 7093, ISO 4029, ISO 5448 |
| ASME/ANSI Standards | ASME B18.2.1, B18.2.2, B18.3, B18.5, B18.6.3, ASME B16.5 (Stud Bolt Lengths), ANSI B18.2.4.1M, ANSI B18.2.4.2M |
| BS Standards | BS 1768, BS 1769, BS 2470, BS 3692, BS 4168, BS 4320, BS 4464, BS 1802 |
| Thread Types | UNC (Unified Coarse), UNF (Unified Fine), BSW (British Standard Whitworth), BSF (British Standard Fine), METRIC, 8UN, NPT, NPTF |
Thread Type Comparison
| Thread Type | Name | Threads per Inch (TPI) | Application |
| UNC | Unified Coarse | Fewer TPI | General purpose, easier assembly |
| UNF | Unified Fine | More TPI | Higher strength, better for thin walls |
| 8UN | 8-Thread Series | Fixed at 8 TPI | Large diameter bolts, high strength |
| BSW | British Standard Whitworth | Varies | British standard applications |
| METRIC | Metric Thread | By pitch (mm) | ISO standard, worldwide use |
Monel 400 Fasteners Applications & Industries Served
Our Monel 400 fasteners are special purpose made in harsh and corrosive environment in various industries:
- Marine Industry: marine piping systems, marine hardware, marine shipbuilding, propeller shafting, pump shafting, offshore platform, marine equipment, salt water tanks and marine fastening applications because of very high salt water and marine air resistance.
- Chemical Processing: Equipment used in producing acids (sulfuric acid, hydrofluoric acid, phosphoric acid), equipment used in the handling of alkali, equipment used in the alkylation of hydrofluoric acid, equipment used in the production of chlorine, caustic soda equipment, and chemical reactors and process vessels in contact with aggressive chemicals.
- Oil & Gas: Offshore platforms, under-sea equipment, wellhead parts, valve assemblies, pump parts, crude petroleum stills, gas scrubbing towers, refinery equipment & petrochemical processing units that are subject to sour gas and H₂S conditions.
- Power Generation: Boiler feed water heaters, de-aerating heaters, condensers, steam turbine components, heat exchanger and power plant piping systems.
- Desalination Plants: Brine heaters, flash evaporators, multi-stage flash (MSF) units, reverse osmosis (RO) systems, desalination equipment that works with high salinity water & seawater intake systems.
- Pulp and Paper: Digesters, bleaching plant, chemical recovery plant & pulping process plant.
- Food Processing: Dairy equipments, food processing equipment, brewing equipment and pharmaceutical manufacturing equipment that need non-contaminating fasteners.
- Aerospace: Aircraft fuel systems, hydraulic systems & structural components in need of high strength and resistance to corrosion.
Chemical Resistance of Monel 400 Fasteners
Monel 400 exhibits excellent resistance to the following chemicals and environments:
- Seawater and brackish water (all concentrations and temperatures)
- Sulfuric acid (up to 80% concentration at ambient temperatures)
- Hydrofluoric acid (all concentrations – superior to most alloys)
- Phosphoric acid
- Alkaline solutions (sodium hydroxide, potassium hydroxide)
- Organic acids (acetic acid, fatty acids)
- Neutral and alkaline salt solutions
- Hydrogen chloride gas
- Crude petroleum and naphtha
Testing of Monel 400 Fasteners
In Kalpataru Piping Solutions, all lots of Monel 400 fasteners are tested thoroughly on quality to guarantee quality performance and international standards. We also have a testing process that consists of destructive and non-destructive tests.
Quality & Material Testing Protocols
Non-Destructive Testing (NDT)
- Ultrasonic Testing (UT)
- Liquid Penetrant Testing (Dye Penetrant)
- Positive Material Identification (PMI)
- Visual and Dimensional Inspection
Destructive Testing
- Tensile Strength Testing
- Yield Strength and Elongation Testing
- Hardness Testing (Rockwell/Brinell)
- Impact Testing (Charpy V-Notch)
- Chemical Analysis (Wet Lab)
Test Certificates Provided
We provide complete documentation with every order, including:
- Manufacturer’s Test Certificate (EN 10204 3.1)
- Mill Test Certificate (MTC)
- Third Party Inspection Reports (TPI)
- NABL Approved Lab Reports
Surface Finishes & Coatings Available
- Mill Finish (Standard)
- Polished / Mirror Finish
- PTFE / Teflon Coating
- Phosphate Coating
- Cadmium Plating
- Hot Dip Galvanizing (HDG)
- Electroless Nickel Plating
Weight Charts (Approximate)
Monel 400 Hex Bolts Weight Chart (kg per 100 pcs)
| Length (mm) | M5 | M6 | M8 | M10 | M12 | M16 | M20 | M22 |
| 16 | 0.448 | 0.743 | 1.590 | 3.211 | – | – | – | – |
| 20 | 0.598 | 0.812 | 1.711 | 3.411 | 4.892 | – | – | – |
| 25 | 0.660 | 0.897 | 1.871 | 3.660 | 5.252 | – | – | – |
| 30 | 0.737 | 1.010 | 2.070 | 3.912 | 5.574 | 10.707 | 18.657 | – |
| 40 | 0.881 | 1.230 | 2.470 | 4.533 | 6.410 | 12.107 | 20.747 | – |
| 50 | 1.030 | 1.450 | 2.870 | 5.155 | 7.299 | 13.624 | 22.727 | 28.409 |
| 60 | – | 1.670 | 3.270 | 5.774 | 8.183 | 15.244 | 25.126 | 32.051 |
| 75 | – | 2.000 | 3.873 | 6.702 | 9.506 | 17.606 | 29.070 | 39.063 |
| 80 | – | 2.111 | 4.072 | 7.013 | 10.000 | 18.248 | 30.303 | 40.000 |
| 100 | – | – | 4.873 | 8.251 | 11.820 | 21.459 | 35.714 | 46.296 |
| 120 | – | – | – | 9.506 | 13.624 | 24.631 | 40.984 | 50.000 |
| 150 | – | – | – | 11.312 | 16.340 | 29.412 | 48.544 | 58.824 |
| 200 | – | – | – | 14.327 | 20.833 | 37.594 | 60.976 | 73.529 |
Monel 400 Hex Nuts Weight Chart (lbs per 100 pcs)
| Size | Finished Hex | Heavy Hex | Jam Nuts | Heavy Hex Jam |
| 1/2″ | 3.75 | 6.54 | 2.62 | 4.00 |
| 5/8″ | 7.33 | 11.9 | 4.93 | 6.96 |
| 3/4″ | 11.9 | 19.3 | 7.70 | 11.0 |
| 7/8″ | 19.0 | 29.7 | 12.0 | 16.7 |
| 1″ | 28.3 | 42.5 | 17.6 | 23.5 |
| 1-1/8″ | 40.3 | 59.2 | 24.7 | 32.4 |
| 1-1/4″ | 54.3 | 78.6 | 36.1 | 45.8 |
| 1-1/2″ | 94.3 | 131 | 60.9 | 74.8 |
| 2″ | 224 | 299 | 140 | 165 |
Monel 400 Washers Weight Chart (kg per 100 pcs)
| Size | Plain Washer | Spring Washer (Flat) | Spring Washer (Square) | Heavy Washer |
| M5 | 0.04 | 0.03 | – | 0.04 |
| M6 | 0.11 | 0.04 | – | 0.11 |
| M8 | 0.20 | 0.16 | 0.11 | 0.21 |
| M10 | 0.39 | 0.25 | 0.20 | 1.60 |
| M12 | 0.58 | 0.38 | 0.23 | 1.90 |
| M16 | 1.06 | 0.89 | 0.59 | 2.90 |
| M20 | 1.64 | 1.52 | 1.23 | 4.40 |
| M24 | 3.11 | 2.62 | 1.81 | 6.30 |
Torque Specifications
Monel 400 Bolts Torque Chart (Approximate)
| Diameter | Torque (Dry) ft-lb | Torque (Lubricated) ft-lb |
| 1/4″ | 4.2 – 4.7 | 3.1 – 3.5 |
| 3/8″ | 15.1 – 17.1 | 11.3 – 12.8 |
| 1/2″ | 36.9 | 27.6 |
| 5/8″ | 73.4 – 83.2 | 55.1 – 62.4 |
| 3/4″ | 131 – 145 | 98 – 109 |
| 1″ | 315 – 353 | 236 – 265 |
Dimensional Charts & Specifications
Monel 400 Hex Head Bolts Dimensions (ANSI B18.2.1)
| Nominal Size | Body Diameter (D) | Width Across Flats (F) | Width Across Corners (G) | Head Height (H) |
| 1/4″ | 0.250 | 7/16″ | 0.505″ | 5/32″ |
| 5/16″ | 0.3125 | 1/2″ | 0.577″ | 13/64″ |
| 3/8″ | 0.375 | 9/16″ | 0.650″ | 15/64″ |
| 1/2″ | 0.500 | 3/4″ | 0.866″ | 5/16″ |
| 5/8″ | 0.625 | 15/16″ | 1.083″ | 25/64″ |
| 3/4″ | 0.750 | 1-1/8″ | 1.299″ | 15/32″ |
| 1″ | 1.000 | 1-1/2″ | 1.732″ | 39/64″ |
| 1-1/4″ | 1.250 | 1-7/8″ | 2.165″ | 25/32″ |
| 1-1/2″ | 1.500 | 2-1/4″ | 2.598″ | 1-5/16″ |
Monel 400 Socket Head Cap Screws Dimensions (ASME B18.3)
| Size | Head Diameter (A) | Head Height (H) | Socket Size (J) |
| 1/4″ | 0.375″ | 0.250″ | 3/16″ |
| 5/16″ | 0.469″ | 0.312″ | 1/4″ |
| 3/8″ | 0.562″ | 0.375″ | 5/16″ |
| 1/2″ | 0.750″ | 0.500″ | 3/8″ |
| 5/8″ | 0.938″ | 0.625″ | 1/2″ |
| 3/4″ | 1.125″ | 0.750″ | 5/8″ |
Monel 400 Stud Bolts – ASME B16.5 Flange Dimensions (Class 150)
| Pipe Size (NPS) | Number of Bolts | Bolt Diameter | Stud Length (RF) |
| 1/2″ | 4 | 1/2″ | 2-1/4″ |
| 1″ | 4 | 1/2″ | 2-1/2″ |
| 2″ | 4 | 5/8″ | 3-1/4″ |
| 3″ | 4 | 5/8″ | 3-1/2″ |
| 4″ | 8 | 5/8″ | 3-1/2″ |
| 6″ | 8 | 3/4″ | 4″ |
| 8″ | 8 | 3/4″ | 4-1/4″ |
| 10″ | 12 | 7/8″ | 4-1/2″ |
| 12″ | 12 | 7/8″ | 4-3/4″ |
Packaging & Shipping
We ensure that all Monel 400 fasteners are packaged securely to prevent damage during transit. Options include:
- Standard export-worthy wooden cases.
- Fumigated wooden pallets for heavy shipments.
- Strong carton boxes for smaller quantities.
- Individual plastic wrapping with identification tags for critical components.
- Custom packaging as per customer requirements.
Global Supply & Export Capabilities
Kalpataru Piping Solutions has a strong global logistics network, ensuring timely delivery to projects worldwide.
Key Export Destinations
- Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain
- Europe: UK, Germany, France, Italy, Spain, Netherlands
- Americas: USA, Canada, Mexico, Brazil
- Asia Pacific: Singapore, Malaysia, Indonesia, Australia, Japan
- Africa: South Africa, Nigeria, Egypt, Kenya
Estimated Delivery Timelines
- Domestic (India): 3-5 Days
- Middle East: 7-10 Days
- Asia Pacific: 10-15 Days
- Europe: 15-20 Days
- USA & Africa: 20-30 Days
Monel 400 Fasteners Supplier in India – Why Choose Kalpataru Piping Solutions?
Kalpataru Piping Solutions is the leading supplier of Monel 400 fasteners in India and has more than 15 years of experience in the industry, and has been certified with ISO 9001:2015 and PED, and they are world leaders in quality. Headquartered in Mumbai, we have a large ex-stock of standard sizes (M6-M56) to be shipped immediately within the 24-48 hours period, and in-house CNC production of customer specification to be delivered in 2-4 weeks. We are the preferred vendor of projects in marine, chemical processing, oil and gas, as well as petrochemical sectors due to our competitive pricing with bulk discounts, zero MOQ policy (delivering one piece to tonnage volumes), and our broad value-added services, such as custom head marking, thread locking, PTFE/phosphate coating, kitting, and complete test documentation (MTC, EN 10204 3.1, PMI reports). Having a highly qualified technical assistance to help in material selection coupled with a strong global logistics network with 50 plus countries, we are capable of providing reliable and traceable corrosion free Monel 400 fastening solutions that can be satisfied to the most challenging application needs.
Indicative Price Range (FOB Mumbai)
| Product Type | Size Range | Approx. Price (USD per piece) |
| Monel 400 Hex Bolts | M6 to M12 | $5.50 – $7.50 |
| Monel 400 Hex Bolts | M16 to M24 | $12.00 – $25.00 |
| Monel 400 Hex Nuts | M6 to M12 | $1.35 – $2.50 |
| Monel 400 Socket Cap Screws | M6 to M12 | $3.25 – $4.50 |
| Monel 400 Stud Bolts | M10 to M20 | $8.00 – $18.00 |
| Monel 400 Washers | M6 to M20 | $0.50 – $2.00 |
Note: Prices are indicative and subject to change based on raw material costs, quantity, and specifications. Contact our sales team for current pricing and bulk discounts.
Heat Treatment & Machining
Heat Treatment of Monel 400
Monel 400 is typically supplied in the annealed condition. Stress relieving can be performed at 1000°F – 1200°F for about one hour, followed by air cooling. Full annealing is done between 1300°F and 1800°F. This alloy cannot be hardened by heat treatment; hardening is achieved only through cold working.
Machining Parameters for Monel 400 Fasteners
| Operation | Tool Material | Cutting Speed | Feed Rate |
| Turning | Carbide (Coated) | 80 – 120 SFM | 0.005 – 0.015 IPR |
| Drilling | Carbide / HSS Cobalt | 30 – 50 SFM | 0.003 – 0.008 IPR |
| Milling | Carbide | 100 – 150 SFM | 0.005 – 0.010 IPT |
| Threading | Carbide / HSS | 40 – 60 SFM | Per pitch |
Machining Challenges with Monel 400
- Work Hardening: Monel 400 work hardens quickly during machining, and needs sharp tools and controlled feed rates.
- Tool Wear: Abrasive nature: This leads to increased tool life, carbide tools or coated tools are suggested.
- Poor Thermal Conductivity: The heat accumulates at the cutting edge; sufficient coolant and reduced speeds are required.
- Stringy Chips: Does form long stringy chips that may cause interference in machining; chip breakers suggested.
- Galling Tendency: May gall or capture on tooling; cutting fluids of sulfur assist.
Monel 400 vs. Stainless Steel – Performance Comparison
| Property | Monel 400 | SS 304 | SS 316 |
| Seawater Resistance | Excellent | Poor (pitting) | Fair (pitting) |
| Hydrofluoric Acid Resistance | Excellent (all concentrations) | Poor | Poor |
| Sulfuric Acid (dilute) | Excellent | Good | Good |
| Chloride Stress Corrosion | Immune | Susceptible | Resistant |
| Strength at Elevated Temp | Good (up to 538°C) | Good (up to 870°C) | Good (up to 870°C) |
| Cost (Relative) | Higher | Lower | Moderate |
| Service Life (Marine) | 25-35 years | 5-10 years | 10-15 years |
Frequently Asked Questions
What is Monel 400?
Are Monel 400 fasteners magnetic?
How does Monel 400 compare to stainless steel?
Do you provide material test certificates?
What is the lead time for custom Monel 400 fasteners?
Is Monel 400 ferrous or non-ferrous?
Why is Monel 400 suitable for marine applications?
What chemicals can Monel 400 fasteners resist?
Can Monel 400 be hardened by heat treatment?
What is the expected service life of Monel 400 fasteners?
Do you supply Monel 400 fasteners with test certificates?
What are the machining challenges with Monel 400?
Technical Resources
- Monel 400 Material Data Sheet (MSDS)
- Fastener Dimensional Standards (DIN/ISO/ASTM)
- Weight Calculation Formulas
- Corrosion Resistance Guide
