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Monel 400 Double End Stud
QS Fastener: Monel 400 Double End Stud
Name: Fujian Monel 400 Double End Stud
Material: Monel 400
Standard: ASME B18.2.1
Size: 5/16 to 4 inch
Length: 30 to 1000 mm
Class: 12.9
Feature: Resistant to hydrofluoric acid
Material: Monel 400
Standard: ASME B18.2.1
Size: 5/16 to 4 inch
Length: 30 to 1000 mm
Class: 12.9
Feature: Resistant to hydrofluoric acid
Quantity
Monel 400 Double End Stud, size range from 5/16 inch to 4 inches, length range from 30 to 1000 mm, strictly manufactured in accordance with ASME B18.2.1 standard, with a strength grade of 12.9. The Monel 400 material endows this Monel 400 Double End Stud with excellent resistance to hydrofluoric acid, exhibiting extremely stable performance in fluorine-containing media, seawater, and high-temperature environments, making it an ideal fastener for chemical equipment, marine engineering, and heat exchangers. As a representative of high-strength double-end studs, the Monel 400 Double End Stud demonstrates outstanding connection reliability under extreme operating conditions.
Monel 400 is a classic nickel-copper alloy with nickel as the matrix and copper as the main alloying element. As a benchmark material in the field of corrosion-resistant alloys, it delivers irreplaceable value under extreme corrosive conditions by virtue of its unique compositional design and stable single-phase austenitic structure. The Monel 400 Double End Stud manufactured from Monel 400 is capable of long-term service in highly corrosive environments, maintaining stable mechanical and corrosion-resistant properties.
Chemical Composition and Mechanical Properties
Monel 400 has a nickel content of not less than 63% and a copper content between 28% and 34%. This nickel-copper binary ratio is the core basis for its excellent performance. In addition, the iron content is controlled below 2.5%, manganese not exceeding 2.0%, and impurities such as carbon, silicon, and sulfur are strictly limited. Its mechanical properties vary with processing conditions: in the annealed state, the typical tensile strength is about 550 MPa, and the yield strength is about 240 MPa; the hardness ranges from 65 to 85 HRB, density is approximately 8.80 g/cm³, and the melting point ranges from 1300 to 1350°C. The Monel 400 Double End Stud made from this material maintains good toughness even at the 12.9 strength grade, meeting the requirements for high preload connection.
Monel 400 has a nickel content of not less than 63% and a copper content between 28% and 34%. This nickel-copper binary ratio is the core basis for its excellent performance. In addition, the iron content is controlled below 2.5%, manganese not exceeding 2.0%, and impurities such as carbon, silicon, and sulfur are strictly limited. Its mechanical properties vary with processing conditions: in the annealed state, the typical tensile strength is about 550 MPa, and the yield strength is about 240 MPa; the hardness ranges from 65 to 85 HRB, density is approximately 8.80 g/cm³, and the melting point ranges from 1300 to 1350°C. The Monel 400 Double End Stud made from this material maintains good toughness even at the 12.9 strength grade, meeting the requirements for high preload connection.
Key Advantages and Corrosion Resistance Characteristics
The most prominent advantage of Monel 400 lies in its excellent resistance to a wide range of corrosive media. It is one of the few commercial alloys capable of resisting hydrofluoric acid at all concentrations (up to the boiling point), and also performs excellently in reducing media such as fluorine gas, hydrochloric acid, and sulfuric acid. In seawater environments, its corrosion rate is as low as less than 0.025 mm per year, and it generally does not suffer from stress corrosion cracking, while also exhibiting excellent resistance to biofouling. This corrosion resistance benefits from the protective layer formed by the high nickel content and the enhanced resistance to non-oxidizing media provided by the copper element. Therefore, selecting the Monel 400 Double End Stud as a key connecting component can significantly improve the long-term operational safety of equipment in fluorine-containing, seawater, and high-temperature conditions.
The most prominent advantage of Monel 400 lies in its excellent resistance to a wide range of corrosive media. It is one of the few commercial alloys capable of resisting hydrofluoric acid at all concentrations (up to the boiling point), and also performs excellently in reducing media such as fluorine gas, hydrochloric acid, and sulfuric acid. In seawater environments, its corrosion rate is as low as less than 0.025 mm per year, and it generally does not suffer from stress corrosion cracking, while also exhibiting excellent resistance to biofouling. This corrosion resistance benefits from the protective layer formed by the high nickel content and the enhanced resistance to non-oxidizing media provided by the copper element. Therefore, selecting the Monel 400 Double End Stud as a key connecting component can significantly improve the long-term operational safety of equipment in fluorine-containing, seawater, and high-temperature conditions.
Typical Application Areas
Based on the above characteristics, Monel 400 is widely used in marine engineering (seawater cooling systems, pump shafts, propeller shafts, valves), chemical and petrochemical equipment (hydrofluoric acid alkylation units, heat exchangers, reactors), as well as nuclear industry and hydrocarbon processing fields. In applications requiring both high strength and seawater corrosion resistance, such as centrifugal pump shafts and fasteners, the Monel 400 Double End Stud is the preferred material. Its double-end stud form facilitates installation and maintenance, making it especially suitable for scenarios with extremely high requirements for fastener reliability, such as heat exchangers, flange connections, and pressure vessels.
Based on the above characteristics, Monel 400 is widely used in marine engineering (seawater cooling systems, pump shafts, propeller shafts, valves), chemical and petrochemical equipment (hydrofluoric acid alkylation units, heat exchangers, reactors), as well as nuclear industry and hydrocarbon processing fields. In applications requiring both high strength and seawater corrosion resistance, such as centrifugal pump shafts and fasteners, the Monel 400 Double End Stud is the preferred material. Its double-end stud form facilitates installation and maintenance, making it especially suitable for scenarios with extremely high requirements for fastener reliability, such as heat exchangers, flange connections, and pressure vessels.
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