Okoye Nickel Alloys is a reputable manufacturer and supplier of Monel 400 Stud Bolts based in Kinshasa, Congo. They’re known for producing top-notch bolts that boast impressive corrosion resistance, strength, and durability. These stud bolts are meticulously engineered to perform reliably even in the toughest industrial, marine, and chemical settings. Okoye Nickel Alloys provides Monel 400 Stud Bolts in a variety of sizes, thread types, and lengths, all crafted to adhere to international quality standards. The company caters to sectors like chemical processing, marine engineering, offshore oil and gas, desalination, and power generation, offering secure and long-lasting fastening solutions for critical applications.
Monel 400 Stud Bolts are primarily made from a nickel-copper alloy, typically containing 66% nickel and 31–34% copper, along with trace amounts of iron and manganese to boost mechanical strength and corrosion resistance. This unique composition gives them excellent resistance to seawater, alkalis, hydrofluoric acid, and other corrosive substances. With a tensile strength of around 620 MPa, a yield strength of 275 MPa, and an elongation of 35%, these bolts ensure dependable mechanical stability. The alloy retains its toughness, ductility, and dimensional integrity even at high temperatures while effectively resisting stress corrosion cracking and embrittlement.
| Material Specification | ASTM F 467 ASME SF 467, UNS 4400 Bolts |
|---|---|
| Monel 400 bolts ISO/ DIN | ISO 4035 , ISO 4032 , DIN 936 , ISO 7040 , ISO 7040 , DIN 315 , ISO 5448 , ISO 4161 , DIN 1587 , DIN 6923 , DIN 934 , DIN 917 , ISO 7035 , DIN 439 , ISO 8675 , DIN 985 , DIN 935 , DIN 17754 |
| Scope Of Manufacture |
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| Monel 400 Bolts, Studs Threads: | METRIC, BSW, BSF, UNC, UNF or as required |
| Monel 400 bolting materials Surface Coating: |
All surface finishes offered, including Galvanised, Zinc, Electroless Nickel, Sherardized,Geomet & PTFE, Dacromet |
| In Form of: | Hex, Square, Round, Threading as per Gauge Etc. |
| Head drive: | Phillips, Slotted, Phillips/Slot, Six-Lobe, etc |
| Standard | DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM and all International Standards |
| Bolts Size | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160 |
| Length | 3 mm to 200 mm |
| Source of raw materials | Tata Steel, JSPL, RINL, Usha Martin, Dhamm Steel, Mukund Steel etc. |
| Monel 400 bolting Test Certificate: | Manufacturer Test Certificate as per EN 10204 / 3.1 |
| Alloy 400 Fasteners Standard: | ANSI – American National Standards Institute
DIN: DIN 931, DIN 933, DIN 934, DIN 970 UTS – Unified Thread Standard : UNC, UNF, UNEF, UNS, NPT, NPTF ISO – International Organization for Standardization : ISO 4032, ISO 4033, JIS standards |
| finishing: | Zinc (yellow, white, blue, black), black oxide, Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Stainless steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Stainless Steel, Mechanically Applied coating and some special one like DACROMET |
| Production process | M2-M24: Cold Froging, hot forging M24-M100, machining and CNC for Customized connecting element |
| Popular Types of Alloy 400 Bolts | Monel 400 Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts etc. |
| Types of Alloy 400 Nut | Monel 400 Hex Head Nut, Eye Nut, Dome Nut, Wing Nut, T Nut, Panel Nut, Lock Nut, Coupling Nut, Square Nut, Acorn Nut etc. |
| Types of Alloy 400 Screw | Monel 400 Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Blind Rivet, Socket Head Screws, Concrete Screws, Shoulder Screws, Panel Screws, Threaded Screws, Machine Screws etc. |
| Widely used Alloy 400 Washer | Monel 400 Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer, Split Washer etc. |
| Packing: | IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request |
| Element | Content (%) |
| Nickel, Ni | 63.00 min |
| Silicon, Si | 0.5 max |
| Carbon, C | 0.3 max |
| Sulphur, S | 0.024 |
| Copper, Cu | 28-34 |
| Iron, Fe | 2.5 max |
| Manganese, Mn | 2 max |
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Properties
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Metric
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Imperial
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Tensile strength(annealed)
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517-620 MPa
|
75-90 ksi
|
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Yield strength
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172-345 MPa
|
25-50 ksi
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Modulus of elasticity
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179 GPa
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26000 ksi
|
|
Poisson’s ratio
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0.32
|
0.32
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At Okoye Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Monel 400 Stud Bolts in Kinshasa, Congo, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Congo, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Monel 400 Stud Bolts are widely utilized in situations that demand corrosion-resistant, durable, and high-strength fastening solutions. They’re perfect for marine and offshore construction, chemical and petrochemical processing, seawater piping systems, desalination plants, heat exchangers, and power generation equipment. These stud bolts create secure, maintenance-free connections in environments that are exposed to seawater, brine, and other aggressive media. Thanks to their outstanding mechanical properties, corrosion resistance, and longevity, Monel 400 Stud Bolts guarantee reliable performance in challenging industrial and marine applications.