Monel 400 Fasteners
Monel 400 Fasteners are made from UNS N04400, a nickel-copper alloy containing not less than 63% nickel and 28 to 34% copper. The alloy has good strength, toughness, and corrosion resistance over a wide range of temperatures. It has good resistance to seawater, hydrofluoric acid, sulphuric acid, and alkaline conditions. Monel 400 retains its mechanical properties at sub-zero temperatures and is suitable for cryogenic service. These fasteners are widely used in marine engineering, chemical processing, oil and gas, and power generation, where chloride attack and acidic media are ongoing concerns.
Approx Price Range
The price per kg of Monel 400 fasteners and the factors that affect its pricing are explained below.
Price Per kg
Monel 400 fasteners price is about ₹1,000 to ₹1,500/kg. For small and mixed orders, pricing is usually by the piece. Ask your supplier for both options before committing.
Factors Affecting Price
Nickel and copper spot prices, order volume, fastener type, certification requirements, surface finish, and lead time all affect the final cost of UNS N04400 fasteners.
Types of UNS N04400 Fasteners
Monel 400 fasteners are available in a full range of types and forms. Each type suits a particular joint design, load condition, or installation method.
- Bolts
- Nuts
- Studs
- Screws
- Washers
Alloy 400 Fasteners Specifications
The table below covers the key specification parameters for Monel 400 fasteners as per international standards.
|
Parameter |
Details |
|
Standard |
ASTM F467 / ASME SF467 |
|
Bolt / Screw Size Range |
M3 – M56 / 3/16" – 2" (CNC machined up to M100 / 4") |
|
Nut Size Range |
M3 – M56 / 3/16" – 2" / custom |
|
Washer Size Range |
M3 – M56 / #4 – 3" |
|
Machine Screw Size Range |
M1.6 – M12 |
|
Length Range |
3 mm – 200 mm (up to 1500 mm for CNC machined) |
|
Manufacturing Process |
Cold forging (M2–M24), Hot forging (M24–M100), CNC machining |
|
Finish |
Plain, Zinc, Black oxide, Nickel plated, PTFE, Geomet, Dacromet |
Chemical Properties of Monel 400 Fasteners
The composition below shows the high nickel and copper content that gives UNS N04400 its corrosion resistance in seawater, acids, and alkalis.
|
Element |
Composition (%) |
|
Nickel (Ni) |
63.0 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 |
|
Sulphur (S) |
0.024 max |
Mechanical Properties of ASTM F467 UNS N04400 Fasteners
The mechanical values below apply to Monel 400 bar stock used to manufacture fasteners, as per ASTM F467 and ASME SF467.
|
Property |
Value |
|
Tensile Strength |
550 MPa (80,000 psi) min |
|
Yield Strength (0.2% offset) |
240 MPa (35,000 psi) min |
|
Elongation |
35% min |
|
Hardness |
Max 100 HRB |
Physical Properties of Nickel Alloy 400 Fasteners
The physical properties below assist engineers in assessing thermal behaviour and suitability for high-temperature or cryogenic service.
|
Property |
Value |
|
Density |
8.80 g/cm³ |
|
Melting Range |
1300 – 1350°C (2370 – 2460°F) |
|
Specific Heat |
427 J/kg·°C |
|
Thermal Conductivity |
21.8 W/m·K (at 100°C) |
|
Electrical Resistivity |
0.547 µΩ·m |
|
Modulus of Elasticity |
179 GPa |
Dimension Chart of DIN 2.4360 Fasteners
The table below lists standard size ranges for the most commonly supplied Monel 400 fastener types, based on DIN and ASME standards.
|
Fastener Type |
Size Range (Metric) |
Size Range (Inch) |
Length Range |
|
Hex Bolt |
M3 – M56 |
3/16" – 2" |
3 mm – 200 mm |
|
Heavy Hex Bolt |
M10 – M100 |
3/8" – 4" |
25 mm – 1100 mm |
|
Stud Bolt (ASME B16.5) |
M10 – M100 |
3/8" – 4" |
As per the flange class |
|
Fully Threaded Stud |
M3 – M56 |
3/16" – 2" |
3 mm – 1500 mm |
|
Hex Nut |
M3 – M56 |
3/16" – 2" |
Standard / Heavy |
|
Coupling Nut |
M6 – M36 |
1/4" – 1-1/2" |
As required |
|
Socket Head Cap Screw |
M1.6 – M36 |
— |
5 mm – 200 mm |
|
Machine Screw |
M1.6 – M12 |
— |
3 mm – 100 mm |
|
Flat Washer |
M3 – M56 |
#4 – 3" |
— |
Size Chart of Monel 400 Fasteners
The size chart below gives standard fastener dimensions for Alloy 400 per ASME B18.2.1.
|
Bolt Size |
Body Dia. Max (in) |
Width Across Flats |
Head Height (in) |
Thread Length ≤ 6" (in) |
|
1/4" |
0.2500 |
7/16 |
5/32 |
0.750 |
|
5/16" |
0.3125 |
1/2 |
13/64 |
0.875 |
|
3/8" |
0.3750 |
9/16 |
15/64 |
1.000 |
|
7/16" |
0.4375 |
5/8 |
9/32 |
1.125 |
|
1/2" |
0.5000 |
3/4 |
5/16 |
1.250 |
|
9/16" |
0.5625 |
13/16 |
23/64 |
1.375 |
|
5/8" |
0.6250 |
15/16 |
25/64 |
1.500 |
|
3/4" |
0.7500 |
1-1/8 |
15/32 |
1.750 |
|
7/8" |
0.8750 |
1-5/16 |
35/64 |
2.000 |
|
1" |
1.0000 |
1-1/2 |
39/64 |
2.250 |
|
1-1/4" |
1.2500 |
1-7/8 |
25/32 |
2.750 |
|
1-1/2" |
1.5000 |
2-1/4 |
1-5/16 |
3.250 |
|
1-3/4" |
1.7500 |
2-5/8 |
1-3/32 |
3.750 |
|
2" |
2.0000 |
3 |
1-7/32 |
4.250 |
Metric sizes available from M3 to M56. CNC-machined sizes up to M100 / 4" on request.
Torque Chart of Monel 400 Fasteners
The torque values below apply to Monel 400 fasteners under controlled assembly conditions. Confirm values with your engineering team based on joint design and service conditions.
|
Bolt Size |
Lubricated Torque (Nm) |
Dry Torque (Nm) |
|
M8 |
15 – 18 |
20 – 24 |
|
M10 |
28 – 33 |
38 – 44 |
|
M12 |
50 – 58 |
68 – 78 |
|
M16 |
120 – 138 |
165 – 185 |
|
M20 |
240 – 268 |
325 – 360 |
|
M24 |
415 – 455 |
560 – 610 |
|
M30 |
830 – 900 |
1120 – 1210 |
|
M36 |
1440 – 1560 |
1940 – 2100 |
Key Features of Monel 400 Fasteners
Monel 400 fasteners provide a reliable combination of strength and corrosion resistance in a wide range of service conditions.
- Seawater corrosion resistance
- Resistance to hydrofluoric acid
- Good resistance to sulphuric and hydrochloric acids
- High strength at sub-zero temperatures
- Resistance to chloride stress corrosion cracking
- Higher strength than austenitic stainless steel grades
- Good weldability
- Wide size range
Applications of ASTM F467 Monel 400 Fasteners
The combination of corrosion resistance and mechanical strength makes Alloy 400 fasteners a reliable selection in many tough industries.
- Marine Engineering
- Chemical Processing
- Oil and Gas
- Power Generation
- Pharmaceutical Manufacturing
- Pulp and Paper
- Cryogenic Applications
How to Choose the Right Monel 400 Fasteners Supplier?
Consider the following things when looking for the right Monel 400 fasteners supplier.
Supplier Selection Criteria
Check the availability of stock. A reliable supplier will be carrying Alloy 400 fasteners in stock as ready inventory in various types and sizes. Hex bolts, stud bolts, nuts, and washers are readily available. As a general fastener distributor, check the supplier’s experience with nickel alloys, as they may not stock the correct grades or certifications for critical service applications.
Technical Considerations
Request material test certificates confirming chemical and mechanical properties per ASTM F467 or ASME SF467. Check stud bolt size per ASME B16.5 for flanged connections. Request documentation for NACE MR0175 for sour gas or H2S service. Check for compatibility of thread forms with mating parts, particularly if you’re mixing inch and metric hardware in the same assembly.
Quality and Certification Check
EN 10204 / 3.1 MTCs with heat number traceability to the mill are a baseline requirement. Look for PMI test reports, third-party inspection certificates, and IGC test records for corrosion critical service. ISO 9001 certification is a minimum requirement. If the project is offshore, nuclear, or marine, please check if there is additional documentation for the project before confirming the order.
Procurement Tips for Bulk Orders
Monel 400 prices follow LME nickel and copper rates. Locking in rates at order placement protects against price changes on long projects. Blanket purchase orders work well for ongoing procurement. Request material samples before full batch approval. Get written delivery commitments rather than estimates. For urgent requirements, check whether the supplier holds finished fastener stock rather than relying on mill supply lead times.
Monel 400 Fasteners are made from UNS N04400, a nickel-copper alloy containing not less than 63% nickel and 28 to 34% copper. The alloy has good strength, toughness, and corrosion resistance over a wide range of temperatures. It has good resistance to seawater, hydrofluoric acid, sulphuric acid, and alkaline conditions. Monel 400 retains its mechanical properties at sub-zero temperatures and is suitable for cryogenic service. These fasteners are widely used in marine engineering, chemical processing, oil and gas, and power generation, where chloride attack and acidic media are ongoing concerns.
Approx Price Range
The price per kg of Monel 400 fasteners and the factors that affect its pricing are explained below.
Price Per kg
Monel 400 fasteners price is about ₹1,000 to ₹1,500/kg. For small and mixed orders, pricing is usually by the piece. Ask your supplier for both options before committing.
Factors Affecting Price
Nickel and copper spot prices, order volume, fastener type, certification requirements, surface finish, and lead time all affect the final cost of UNS N04400 fasteners.
Types of UNS N04400 Fasteners
Monel 400 fasteners are available in a full range of types and forms. Each type suits a particular joint design, load condition, or installation method.
- Bolts
- Nuts
- Studs
- Screws
- Washers
Alloy 400 Fasteners Specifications
The table below covers the key specification parameters for Monel 400 fasteners as per international standards.
|
Parameter |
Details |
|
Standard |
ASTM F467 / ASME SF467 |
|
Bolt / Screw Size Range |
M3 – M56 / 3/16" – 2" (CNC machined up to M100 / 4") |
|
Nut Size Range |
M3 – M56 / 3/16" – 2" / custom |
|
Washer Size Range |
M3 – M56 / #4 – 3" |
|
Machine Screw Size Range |
M1.6 – M12 |
|
Length Range |
3 mm – 200 mm (up to 1500 mm for CNC machined) |
|
Manufacturing Process |
Cold forging (M2–M24), Hot forging (M24–M100), CNC machining |
|
Finish |
Plain, Zinc, Black oxide, Nickel plated, PTFE, Geomet, Dacromet |
Chemical Properties of Monel 400 Fasteners
The composition below shows the high nickel and copper content that gives UNS N04400 its corrosion resistance in seawater, acids, and alkalis.
|
Element |
Composition (%) |
|
Nickel (Ni) |
63.0 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 |
|
Sulphur (S) |
0.024 max |
Mechanical Properties of ASTM F467 UNS N04400 Fasteners
The mechanical values below apply to Monel 400 bar stock used to manufacture fasteners, as per ASTM F467 and ASME SF467.
|
Property |
Value |
|
Tensile Strength |
550 MPa (80,000 psi) min |
|
Yield Strength (0.2% offset) |
240 MPa (35,000 psi) min |
|
Elongation |
35% min |
|
Hardness |
Max 100 HRB |
Physical Properties of Nickel Alloy 400 Fasteners
The physical properties below assist engineers in assessing thermal behaviour and suitability for high-temperature or cryogenic service.
|
Property |
Value |
|
Density |
8.80 g/cm³ |
|
Melting Range |
1300 – 1350°C (2370 – 2460°F) |
|
Specific Heat |
427 J/kg·°C |
|
Thermal Conductivity |
21.8 W/m·K (at 100°C) |
|
Electrical Resistivity |
0.547 µΩ·m |
|
Modulus of Elasticity |
179 GPa |
Dimension Chart of DIN 2.4360 Fasteners
The table below lists standard size ranges for the most commonly supplied Monel 400 fastener types, based on DIN and ASME standards.
|
Fastener Type |
Size Range (Metric) |
Size Range (Inch) |
Length Range |
|
Hex Bolt |
M3 – M56 |
3/16" – 2" |
3 mm – 200 mm |
|
Heavy Hex Bolt |
M10 – M100 |
3/8" – 4" |
25 mm – 1100 mm |
|
Stud Bolt (ASME B16.5) |
M10 – M100 |
3/8" – 4" |
As per the flange class |
|
Fully Threaded Stud |
M3 – M56 |
3/16" – 2" |
3 mm – 1500 mm |
|
Hex Nut |
M3 – M56 |
3/16" – 2" |
Standard / Heavy |
|
Coupling Nut |
M6 – M36 |
1/4" – 1-1/2" |
As required |
|
Socket Head Cap Screw |
M1.6 – M36 |
— |
5 mm – 200 mm |
|
Machine Screw |
M1.6 – M12 |
— |
3 mm – 100 mm |
|
Flat Washer |
M3 – M56 |
#4 – 3" |
— |
Size Chart of Monel 400 Fasteners
The size chart below gives standard fastener dimensions for Alloy 400 per ASME B18.2.1.
|
Bolt Size |
Body Dia. Max (in) |
Width Across Flats |
Head Height (in) |
Thread Length ≤ 6" (in) |
|
1/4" |
0.2500 |
7/16 |
5/32 |
0.750 |
|
5/16" |
0.3125 |
1/2 |
13/64 |
0.875 |
|
3/8" |
0.3750 |
9/16 |
15/64 |
1.000 |
|
7/16" |
0.4375 |
5/8 |
9/32 |
1.125 |
|
1/2" |
0.5000 |
3/4 |
5/16 |
1.250 |
|
9/16" |
0.5625 |
13/16 |
23/64 |
1.375 |
|
5/8" |
0.6250 |
15/16 |
25/64 |
1.500 |
|
3/4" |
0.7500 |
1-1/8 |
15/32 |
1.750 |
|
7/8" |
0.8750 |
1-5/16 |
35/64 |
2.000 |
|
1" |
1.0000 |
1-1/2 |
39/64 |
2.250 |
|
1-1/4" |
1.2500 |
1-7/8 |
25/32 |
2.750 |
|
1-1/2" |
1.5000 |
2-1/4 |
1-5/16 |
3.250 |
|
1-3/4" |
1.7500 |
2-5/8 |
1-3/32 |
3.750 |
|
2" |
2.0000 |
3 |
1-7/32 |
4.250 |
Metric sizes available from M3 to M56. CNC-machined sizes up to M100 / 4" on request.
Torque Chart of Monel 400 Fasteners
The torque values below apply to Monel 400 fasteners under controlled assembly conditions. Confirm values with your engineering team based on joint design and service conditions.
|
Bolt Size |
Lubricated Torque (Nm) |
Dry Torque (Nm) |
|
M8 |
15 – 18 |
20 – 24 |
|
M10 |
28 – 33 |
38 – 44 |
|
M12 |
50 – 58 |
68 – 78 |
|
M16 |
120 – 138 |
165 – 185 |
|
M20 |
240 – 268 |
325 – 360 |
|
M24 |
415 – 455 |
560 – 610 |
|
M30 |
830 – 900 |
1120 – 1210 |
|
M36 |
1440 – 1560 |
1940 – 2100 |
Key Features of Monel 400 Fasteners
Monel 400 fasteners provide a reliable combination of strength and corrosion resistance in a wide range of service conditions.
- Seawater corrosion resistance
- Resistance to hydrofluoric acid
- Good resistance to sulphuric and hydrochloric acids
- High strength at sub-zero temperatures
- Resistance to chloride stress corrosion cracking
- Higher strength than austenitic stainless steel grades
- Good weldability
- Wide size range
Applications of ASTM F467 Monel 400 Fasteners
The combination of corrosion resistance and mechanical strength makes Alloy 400 fasteners a reliable selection in many tough industries.
- Marine Engineering
- Chemical Processing
- Oil and Gas
- Power Generation
- Pharmaceutical Manufacturing
- Pulp and Paper
- Cryogenic Applications
How to Choose the Right Monel 400 Fasteners Supplier?
Consider the following things when looking for the right Monel 400 fasteners supplier.
Supplier Selection Criteria
Check the availability of stock. A reliable supplier will be carrying Alloy 400 fasteners in stock as ready inventory in various types and sizes. Hex bolts, stud bolts, nuts, and washers are readily available. As a general fastener distributor, check the supplier’s experience with nickel alloys, as they may not stock the correct grades or certifications for critical service applications.
Technical Considerations
Request material test certificates confirming chemical and mechanical properties per ASTM F467 or ASME SF467. Check stud bolt size per ASME B16.5 for flanged connections. Request documentation for NACE MR0175 for sour gas or H2S service. Check for compatibility of thread forms with mating parts, particularly if you’re mixing inch and metric hardware in the same assembly.
Quality and Certification Check
EN 10204 / 3.1 MTCs with heat number traceability to the mill are a baseline requirement. Look for PMI test reports, third-party inspection certificates, and IGC test records for corrosion critical service. ISO 9001 certification is a minimum requirement. If the project is offshore, nuclear, or marine, please check if there is additional documentation for the project before confirming the order.
Procurement Tips for Bulk Orders
Monel 400 prices follow LME nickel and copper rates. Locking in rates at order placement protects against price changes on long projects. Blanket purchase orders work well for ongoing procurement. Request material samples before full batch approval. Get written delivery commitments rather than estimates. For urgent requirements, check whether the supplier holds finished fastener stock rather than relying on mill supply lead times.
Monel 400 Fasteners Suppliers
Monel 400 Fasteners FAQ's
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