Premium Monel 400/K500 Fasteners by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, and supplier of premium quality Monel 400 and Monel K500 Fasteners. Produced from high-performance nickel-copper alloys using advanced manufacturing techniques, our Monel fasteners deliver outstanding corrosion resistance, high strength, and long service life in demanding industrial environments. We supply Monel fasteners in various sizes, standards, and specifications to meet global project requirements.
Monel 400/K500 fasteners are highly valued for their exceptional resistance to seawater, acids, alkalis, and high-temperature conditions. Monel 400 offers excellent toughness and corrosion resistance, while Monel K500 provides enhanced strength and hardness through precipitation hardening. These properties make Monel alloy fasteners ideal for critical applications where reliability, durability, and performance are essential.
With precise threading, superior surface finish, and strict quality control, our Monel 400 & K500 fasteners ensure consistent performance under high pressure, thermal cycling, and harsh chemical exposure. They are widely used in marine engineering, offshore oil & gas, chemical processing, heat exchangers, pumps, valves, and aerospace industries. For corrosion-resistant fastening solutions, Monel fasteners are a proven and cost-effective choice.
Our Range of Monel Alloy 400 / K500 Industrial Fasteners
- Monel 400 & K500 Hex, Heavy Hex and Lock Nuts
- UNS N04400 / N05500 High-Nickel Alloy Nuts
- DIN 2.4360 & 2.4375 Precision Machined Nuts
- Excellent resistance to seawater, acids & alkalis
- ASTM B164 Monel 400 & K500 Bolting
- Hex, Heavy Hex & Machine Bolt Configurations
- DIN 2.4360 / 2.4375 Nickel-Copper Alloy Bolts
- Used in marine, offshore & chemical industries
- ASTM B164 Monel 400 / K500 Screws
- Socket Head Cap, Button Head & Set Screws
- DIN 2.4360 / 2.4375 Precision Threaded Screws
- High resistance to corrosion and galling
- Monel 400 & K500 Plain, Spring & Dock Washers
- Split, Ogee & Custom Washer Designs
- Prevents galvanic corrosion in marine joints
- Ideal for offshore and seawater applications
- ASTM B164 Monel 400 / K500 Stud Bolts
- Single Ended, Double Ended & Fully Threaded Studs
- DIN 2.4360 / 2.4375 Nickel-Copper Alloy Studs
- Used in flanges, valves & pressure equipment
- Monel 400 & K500 Fully Threaded Rods
- ASTM B164 / UNS N04400 & N05500 Compliance
- Excellent performance in marine & chemical service
- Used in offshore structures and heat exchangers
400 / K500 MONEL ASTM B164 FASTENERS EQUIVALENT GRADES
| Standard | UNS | WNR. | EN | JIS | GOST | AFNOR | BS |
|---|---|---|---|---|---|---|---|
| Monel 400 | N04400 | 2.4360 | NiCu30Fe | NW 4400 | MНЖМц 28-2.5-1.5 | NU-30M | NA 13 |
| Monel K500 | N05500 | 2.4375 | — | — | — | — | — |
SPECIFICATION OF MONEL FASTENERS
| Standard | ASTM B164 / ASME SB164 |
|---|---|
| Dimension Standards | DIN, ISO, ASTM, JIS, BS, GB, IS & International |
| Size Range | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Length | 3 mm to 200 mm |
| Types | Nuts, Bolts, Screws, Studs, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Hex Nuts, Lock Nuts, Washers, Spring Washers, Threaded Rods, U-Bolts, Anchor Bolts, Eye Bolts, Foundation Bolts, Structural Fasteners |
CHEMICAL COMPOSITION OF MONEL 400 / K500 FASTENERS
| Grade | Ni | Fe | C | Mn | Si | Cu | Al | Ti | S |
|---|---|---|---|---|---|---|---|---|---|
| Monel 400 | 63.0 – 70.0 | 2.5 max | 0.30 max | 2.0 max | 0.50 max | Balance | — | — | 0.024 max |
| Monel K500 | 63.0 min | 0.5 – 2.0 | 0.25 max | 1.5 max | 0.5 max | 27.0 – 33.0 | 2.3 – 3.15 | 0.35 – 0.85 | 0.010 max |
MECHANICAL PROPERTIES OF ASME SB164 MONEL FASTENERS
| Grade | Tensile Strength (ksi) | 0.2% Yield Strength (ksi) | Elongation (%) | Hardness (HRB) |
|---|---|---|---|---|
| Monel 400 | 75 – 90 | 25 – 50 | 35 – 60 | 60 – 80 |
| Monel K500 | 160 (1100 MPa) | 115 (790 MPa) | 20 | — |
PHYSICAL PROPERTIES OF MONEL 400 FASTENERS
| Density (Room Temp) | 0.318 lb/in³ |
|---|---|
| Elastic Modulus @ 70°F | 26.0 × 10⁶ psi |
| Specific Heat @ 70°F | 0.102 Btu/lb·°F |
| Melting Point | 2370°F – 2460°F |
| Thermal Conductivity @ 70°F | 151 Btu·in/hr·ft²·°F |
| Electrical Resistivity @ 70°F | 0.511 µΩ·m |
PHYSICAL PROPERTIES OF MONEL K500 FASTENERS
| Density | 8.43 g/cm³ |
|---|---|
| Magnetic Permeability (20°C) | < 1.005 |
| Curie Temperature | -90°C |
| Young’s Modulus | 179 × 10³ N/mm² |
| Specific Heat @ 20°C | 418 J/kg·K |
| Electrical Resistivity @ 20°C | 0.62 µΩ·m |
| Thermal Expansion (20–100°C) | 13.4 × 10⁻⁶ /K |
💡 Practical Difference in Use
Use Monel 400 / Monel K500 Fasteners when: superior corrosion resistance and high strength are required in harsh marine, chemical, and offshore environments. → Example: offshore platforms, chemical processing plants, seawater handling systems, and high-pressure pump components.
Applications of Monel 400 / K500 Fasteners
Monel 400 and Monel K500 fasteners (UNS N04400 / N05500) offer outstanding resistance to seawater, acids, alkalis, and high-temperature conditions. Monel 400 provides excellent corrosion resistance and toughness, while Monel K500 delivers higher strength and hardness through precipitation hardening. These fasteners are ideal for critical applications requiring durability and long-term reliability.
- Seawater & Marine Systems: Pumps, valves, shafts, and piping.
- Chemical Processing: Reactors, heat exchangers, and storage units.
- Offshore Oil & Gas: Platform equipment and subsea components.
When to Choose Monel 400 / K500 Fasteners?
Monel alloy fasteners are selected for applications requiring exceptional corrosion resistance, high mechanical strength, and performance in extreme environments.
Choose Monel 400 / K500 Fasteners when:
- Severe marine or chemical exposure exists
- High strength and toughness are required
- Resistance to acids and alkalis is critical
- High-pressure or high-temperature systems are involved
- Long-term reliability in harsh environments is essential
Industries That Use Monel 400 / K500 Fasteners
Monel 400 and K500 fasteners are widely used in industries requiring corrosion-resistant and high-strength fastening solutions.
Built for extreme offshore conditions.
Uses
Subsea equipment, valves, and pumps.
Why Monel 400/K500?
Excellent resistance to seawater and sour gas environments.
Reliable in aggressive chemical media.
Uses
Heat exchangers, reactors, and storage tanks.
Why Monel 400/K500?
Superior resistance to acids, alkalis, and corrosion.
Designed for long-term marine service.
Uses
Propeller shafts, seawater systems.
Why Monel 400/K500?
Outstanding durability in seawater environments.
Usage Guide for Monel 400 / K500 Fasteners
Monel 400 and Monel K500 nuts provide exceptional corrosion resistance and high strength for harsh marine and chemical environments.
Choose Monel 400 / K500 Nuts when
- Used in aggressive marine or chemical environments
- High mechanical strength is required (K500)
- Exposure to acids, alkalis, or seawater exists
- Long service life in critical applications is expected
Monel alloy bolts deliver reliable fastening in offshore, marine, and chemical processing systems.
Choose Monel 400 / K500 Bolts when
- Used in offshore oil & gas and seawater systems
- High-pressure or high-temperature service is involved
- Superior corrosion resistance is required
- Heavy-duty industrial fastening is needed
Monel 400/K500 screws ensure secure fastening in highly corrosive and marine atmospheres.
Choose Monel 400 / K500 Screws when
- Used in shipbuilding and offshore equipment
- Continuous seawater or salt spray exposure exists
- High strength and durability are needed
- Critical corrosion-resistant fastening is required
Monel washers distribute load effectively while resisting corrosion and galvanic reactions.
Choose Monel 400 / K500 Washers when
- Used in offshore flanges and marine joints
- Protection against galvanic corrosion is needed
- Exposure to chemicals or seawater is constant
- Joint reliability in extreme environments is critical
Monel 400 and K500 stud bolts are ideal for high-pressure and high-corrosion environments.
Choose Monel 400 / K500 Stud Bolts when
- Used in offshore platforms and refineries
- High strength and toughness are required
- Severe chemical exposure exists
- Long-term performance is essential
Monel threaded rods offer versatile, corrosion-resistant fastening for demanding industries.
Choose Monel 400 / K500 Threaded Rods when
- Custom-length, high-strength fastening is required
- Used in marine, chemical, or offshore structures
- Resistance to acids and seawater is necessary
- Premium, long-life fasteners are preferred
Our Industrial Fasteners are manufactured using precision forging and machining processes to ensure excellent dimensional accuracy, strength, and long-term performance. Each fastener undergoes strict quality inspections, including visual and dimensional checks, tensile testing, hardness testing, and thread gauging to verify compliance with specified tolerances.
Comprehensive chemical composition analysis and mechanical property testing are carried out to confirm material integrity and standard conformity. Where required, additional NDT methods such as ultrasonic testing, magnetic particle inspection (MPI), or dye penetrant testing (DPT) are performed to detect surface or internal defects. Controlled forging, heat treatment, and threading processes eliminate issues such as cracks, laps, and thread imperfections.
All fasteners are manufactured and tested in accordance with international standards including ASTM, ASME, ISO, DIN, BS, and IS specifications. Engineered for reliable performance in high-pressure, high-temperature, and corrosive environments, our fasteners are widely used across oil & gas, petrochemical, power generation, construction, and heavy engineering industries.
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