Hardness testing to ISO 6508-1
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Vision Alloys is a trusted supplier, stockist, and exporter of Monel 400 stud bolts, serving industries that require superior corrosion resistance and mechanical strength. These fasteners are extensively used in oil and gas processing, marine engineering, desalination plants, pulp and paper manufacturing, and chemical processing facilities. They are engineered to withstand seawater exposure, brine solutions, acidic media, and elevated temperatures without losing integrity. Due to their outstanding resistance to corrosion in both fresh and saltwater, they are the preferred choice for offshore structures, pump shafts, heat exchangers, and condenser systems.
The 400 monel studs range includes double-ended studs, fully threaded rods, tie rods, and partially threaded stud bolts, available in sizes M2 to M33 and lengths from 3 mm to 200 mm. Threading options include metric coarse, metric fine, UNC, and UNF, allowing compatibility with diverse assemblies. Every fastener is produced to comply with international standards, including ASTM F467, ASME SF467, UNS N04400, DIN EN 2.4360, and ISO 898-1 where applicable. These standards ensure the stud bolts meet strict tolerances for tensile strength, dimensional accuracy, and surface finish, making them suitable for high-spec industrial installations worldwide.
Monel 400 is a solid-solution nickel-copper alloy with a nominal composition of 63% nickel and 28–34% copper, along with small amounts of iron (≤ 2.5%), manganese (≤ 2%), carbon (≤ 0.3%), silicon (≤ 0.5%), and sulfur (≤ 0.024%). This alloy is virtually immune to chloride stress corrosion cracking and resists pitting in seawater at flow rates exceeding 3.6 m/s. It performs exceptionally well in hydrofluoric acid, hydrochloric acid under controlled conditions, alkaline solutions, and neutral salts. These qualities make Monel 400 stud bolts ideal for applications where exposure to harsh and reducing environments is unavoidable.
In addition to corrosion resistance, Monel alloy 400 stud bolts offer impressive mechanical properties. They provide a tensile strength between 517 and 620 MPa (75–90 ksi), a yield strength between 172 and 345 MPa (25–50 ksi), and elongation ranging from 40% to 48%. The alloy retains its toughness and ductility even at sub-zero temperatures, making it suitable for cryogenic applications. It also maintains structural stability up to about 480°C, allowing it to be used in heat exchangers, boilers, and superheaters. These properties ensure that Monel 400 stud bolts provide secure fastening under both thermal expansion and mechanical load variations.
| Specifications | ASTM F467 / ASME SF467 |
| Diameter | 1/4"-3" Matric:M27 to M72 in length 2000mm |
| Dimensions | DIN 975/976, ASME B18.2.1, B18.31.3, B16.5 |
| DIN Standard | B.S. DIN 931, DIN 933, DIN 912, DIN 934, DIN 6923, DIN 603, DIN 7981, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913 |
| UTS | NPT, UNS, UNF, UNC, UNEF, NPTF |
| ISO | ISO 4033, ISO 4032, ISO 7380, ISO 4017, JIS standards |
| Threads | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Type | Cold Forged, Hot Forged, Bar Stock Machined, Bar Stock Milling |
Customers can order Monel 400 stud bolts in standard sizes or request custom-made variants to match specific engineering drawings and application requirements. Customization options include different threading profiles, special lengths, and protective coatings such as PTFE, Xylan, or passivation for enhanced performance.
Each fastener undergoes rigorous testing, including PMI (Positive Material Identification), tensile testing, hardness measurement, and dimensional inspection to confirm compliance with ASTM, ASME, and DIN specifications. Vision Alloys maintains substantial ready stock and ensures timely global delivery, offering high-quality Monel 400 stud bolts at competitive prices for critical industrial applications.
To preserve the high standards of our selection of industrial stud bolts, we have always adhered to a systematic quality management process.
Our staff of experts is vibrant and talented, and they have always been our largest supporters and contributors to our success. Our vision is to create a world of stud bolts.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Monel 400 | 2.4360 | N04400 | NW 4400 | NA 13 | МНЖМц 28-2,5-1,5 | NU-30M | NiCu30Fe |
| Grade | C | Mn | Si | S | Cu | Fe | Ni |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.024 max | 28.00 – 34.00 | 2.50 max | 63.00 min |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Monel 400 | 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80,000 , MPa – 550 | Psi – 35,000 , MPa – 240 | 40 % |
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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