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Name | Monel 400 Hex bolt |
Standard | DIN931/DIN933,ISO4014/ISO4017,ASME B 18.2.1, JIS B1180 |
Size Range | M5-M64 or non-standard as requested |
Finish | Bright&Clean |
Marking | HT&FST or customization |
Material | Monel400,2.4360,UNS N04400 |
Grade | Grade 70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets, or according to customers' requirement. |
| Payment | T/T,Western Union |
Monel 400
UNS | Trademark | W.Nr |
| N04400 | Monel 400 | 2.4360 |
Monel 400 Chemical composition
Alloy | % | Ni | Cu | Fe | C | Mn | Si | S |
| Monel400 | Min. | Bal | 28 | |||||
| Max. | 34 | 2.5 | 0.3 | 2 | 0.5 | 0.024 |
Monel 400 Physical properties
Density | 8.83 g/cm3 |
| Melting point | 1300-1390°C |
Minimum mechanical properties in the room temperature
| Alloy state | Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation A5% |
| Monel400 | 480 | 170 | 35 |
The Monel 400 Hex Bolt is a high-performance fastener engineered for extreme corrosion resistance in harsh environments, combining the superior durability of nickel-copper alloy with the versatility of a standard hex head design. Manufactured to ASTM B163 and ASME SB-163 standards, this bolt excels in marine, chemical, and high-temperature applications where conventional steel fasteners fail. Monel 400 (UNS N04400) offers exceptional resistance to seawater, hydrofluoric acid, and chloride stress corrosion, making it ideal for critical connections that demand long-term reliability without maintenance. The hexagonal head allows easy tightening with standard wrenches, while the precision-machined threads ensure a secure, leak-free fit in flanges, valves, and structural components.
1. Superior Corrosion Resistance: Monel 400’s nickel-copper composition (66% Ni, 31.5% Cu) provides outstanding resistance to chloride-ion stress corrosion, pitting, and erosion in seawater, brine, and acidic media. It outperforms stainless steel in marine atmospheres, with a corrosion rate <0.05 mm/year in 3.5% NaCl solution.
2. High-Temperature Performance: Maintains mechanical integrity from cryogenic temperatures (-200°C/-328°F) up to 480°C (896°F), making it suitable for thermal cycling applications like heat exchangers, furnace components, and cryogenic storage tanks.
3. Precision Machining and Thread Standards: Available in UNC/UNF (ASME B1.1) and metric (ISO 965-1) threads with Class 2A/2B fit, ensuring compatibility with global piping and structural systems. The hex head complies with ASME B18.2.1, featuring a flatness tolerance of ±0.1mm for wrench engagement.
4. Surface Finish Options: Standard as-machined finish (Ra 12.5μm) or optional passivation (to remove machining oils) and electroless nickel plating (5-10μm thickness) for enhanced resistance in sulfuric acid environments.
5. Load-Bearing Capacity: Tensile strength of 650 MPa (94,260 PSI) and yield strength of 240 MPa (34,810 PSI) ensure reliable load distribution in structural and pressure-containing applications, with proof load testing conducted to ASTM F606 standards.
• Marine Engineering: Secures hull components, propeller shafts, and offshore platform structures exposed to saltwater and tidal fluctuations, reducing downtime from fastener replacement.
• Chemical Processing: Used in reactors, pipelines, and valves handling hydrofluoric acid, ammonia, and chloride-based solutions, where corrosion resistance is critical to process safety.
• Aerospace and Defense: Mounts engine components and airframe structures in high-moisture, high-vibration environments, such as helicopter landing gear and naval aircraft.
• Energy Sector: Connects equipment in geothermal plants, brine concentrators, and saltwater desalination systems, enduring harsh conditions that degrade standard fasteners.
Q: How does Monel 400 compare to 316 stainless steel in seawater?
A: Monel 400 has a corrosion rate 5x lower than 316 SS in stagnant seawater and is immune to chloride stress corrosion cracking, which commonly affects austenitic stainless steels.
Q: Can these bolts be used in oxygen-rich environments?
A: Yes, Monel 400 is non-sparking and compatible with liquid oxygen systems, making it suitable for aerospace and cryogenic applications.
Q: What is the recommended torque for installing Monel 400 bolts?
A: Torque values depend on thread size and application. As a guideline, use 70-80% of the bolt’s proof load torque to avoid over-stressing the alloy.
Q: Are these bolts available in custom lengths?
A: Yes, we offer custom lengths from 10mm to 300mm in 1mm increments for both metric and imperial sizes, with no minimum order quantity for standard diameters (M6 to M36 / 1/4" to 1-1/2").
Q: How should Monel 400 bolts be stored to prevent corrosion?
A: Store in dry, sealed containers with desiccant packs, avoiding contact with galvanic metals like aluminum or zinc, which may cause crevice corrosion.
Name | Monel 400 Hex bolt |
Standard | DIN931/DIN933,ISO4014/ISO4017,ASME B 18.2.1, JIS B1180 |
Size Range | M5-M64 or non-standard as requested |
Finish | Bright&Clean |
Marking | HT&FST or customization |
Material | Monel400,2.4360,UNS N04400 |
Grade | Grade 70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets, or according to customers' requirement. |
| Payment | T/T,Western Union |
Monel 400
UNS | Trademark | W.Nr |
| N04400 | Monel 400 | 2.4360 |
Monel 400 Chemical composition
Alloy | % | Ni | Cu | Fe | C | Mn | Si | S |
| Monel400 | Min. | Bal | 28 | |||||
| Max. | 34 | 2.5 | 0.3 | 2 | 0.5 | 0.024 |
Monel 400 Physical properties
Density | 8.83 g/cm3 |
| Melting point | 1300-1390°C |
Minimum mechanical properties in the room temperature
| Alloy state | Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation A5% |
| Monel400 | 480 | 170 | 35 |
The Monel 400 Hex Bolt is a high-performance fastener engineered for extreme corrosion resistance in harsh environments, combining the superior durability of nickel-copper alloy with the versatility of a standard hex head design. Manufactured to ASTM B163 and ASME SB-163 standards, this bolt excels in marine, chemical, and high-temperature applications where conventional steel fasteners fail. Monel 400 (UNS N04400) offers exceptional resistance to seawater, hydrofluoric acid, and chloride stress corrosion, making it ideal for critical connections that demand long-term reliability without maintenance. The hexagonal head allows easy tightening with standard wrenches, while the precision-machined threads ensure a secure, leak-free fit in flanges, valves, and structural components.
1. Superior Corrosion Resistance: Monel 400’s nickel-copper composition (66% Ni, 31.5% Cu) provides outstanding resistance to chloride-ion stress corrosion, pitting, and erosion in seawater, brine, and acidic media. It outperforms stainless steel in marine atmospheres, with a corrosion rate <0.05 mm/year in 3.5% NaCl solution.
2. High-Temperature Performance: Maintains mechanical integrity from cryogenic temperatures (-200°C/-328°F) up to 480°C (896°F), making it suitable for thermal cycling applications like heat exchangers, furnace components, and cryogenic storage tanks.
3. Precision Machining and Thread Standards: Available in UNC/UNF (ASME B1.1) and metric (ISO 965-1) threads with Class 2A/2B fit, ensuring compatibility with global piping and structural systems. The hex head complies with ASME B18.2.1, featuring a flatness tolerance of ±0.1mm for wrench engagement.
4. Surface Finish Options: Standard as-machined finish (Ra 12.5μm) or optional passivation (to remove machining oils) and electroless nickel plating (5-10μm thickness) for enhanced resistance in sulfuric acid environments.
5. Load-Bearing Capacity: Tensile strength of 650 MPa (94,260 PSI) and yield strength of 240 MPa (34,810 PSI) ensure reliable load distribution in structural and pressure-containing applications, with proof load testing conducted to ASTM F606 standards.
• Marine Engineering: Secures hull components, propeller shafts, and offshore platform structures exposed to saltwater and tidal fluctuations, reducing downtime from fastener replacement.
• Chemical Processing: Used in reactors, pipelines, and valves handling hydrofluoric acid, ammonia, and chloride-based solutions, where corrosion resistance is critical to process safety.
• Aerospace and Defense: Mounts engine components and airframe structures in high-moisture, high-vibration environments, such as helicopter landing gear and naval aircraft.
• Energy Sector: Connects equipment in geothermal plants, brine concentrators, and saltwater desalination systems, enduring harsh conditions that degrade standard fasteners.
Q: How does Monel 400 compare to 316 stainless steel in seawater?
A: Monel 400 has a corrosion rate 5x lower than 316 SS in stagnant seawater and is immune to chloride stress corrosion cracking, which commonly affects austenitic stainless steels.
Q: Can these bolts be used in oxygen-rich environments?
A: Yes, Monel 400 is non-sparking and compatible with liquid oxygen systems, making it suitable for aerospace and cryogenic applications.
Q: What is the recommended torque for installing Monel 400 bolts?
A: Torque values depend on thread size and application. As a guideline, use 70-80% of the bolt’s proof load torque to avoid over-stressing the alloy.
Q: Are these bolts available in custom lengths?
A: Yes, we offer custom lengths from 10mm to 300mm in 1mm increments for both metric and imperial sizes, with no minimum order quantity for standard diameters (M6 to M36 / 1/4" to 1-1/2").
Q: How should Monel 400 bolts be stored to prevent corrosion?
A: Store in dry, sealed containers with desiccant packs, avoiding contact with galvanic metals like aluminum or zinc, which may cause crevice corrosion.
