Chemical Composition Requirements of Monel K-500

Monel K-500 is a high-performance nickel-copper-based alloy with excellent corrosion resistance and mechanical properties. The chemical composition requirements of Monel K-500 are as follows:

1. Nickel (Ni) : 63% to 70%.
2. Copper (Cu) : 27% to 33%.
3. Aluminum (Al) : 2.3% to 3.15%.
4. Titanium (Ti) : 0.35% to 0.85%.
5. Iron (Fe) : ≤2.0%.
6. Manganese (Mn) : ≤1.5%.
7. Silicon (Si) : ≤0.5%.
8. Sulfur (S) : ≤0.025%.
9. Carbon (C) : ≤0.025%.

These ingredients ensure excellent performance of the Monel K-500 in a variety of harsh environments, including seawater, acidic, alkaline and hydrogen-containing environments. In addition, Monel K-500 also has good mechanical properties, such as high tensile strength and elongation, making it widely used in aerospace, marine engineering and petrochemical industries.

Typical Physical Properties of Monel K-500

Monel K-500 is a nickel-copper alloy with excellent corrosion resistance and mechanical properties. Its typical physical properties are as follows:

1. Density : 8.44 g/cm³.
2. Melting point : 1288-1343℃.
3. Modulus of elasticity : 179 GPa.
4. Coefficient of thermal expansion : 10.3 x 10⁻⁶ K⁻¹ at 20-100°C.
5. Thermal conductivity : 24 W/m·K.
6. Specific heat capacity : 418 J/(kg·K·°C).
7. Resistivity : 0.62 Ω·cm (20°C).
8. Curie temperature : -90°C.
9. Permeability : <1.005.

In addition, the tensile strength of Monel K-500 at room temperature is 1100 MPa, the yield strength is 655 MPa, and the elongation is 20%. Good mechanical properties and corrosion resistance in the temperature range of -100°C to +260°C.

Mechanical Properties of Monel K-500

Monel K-500 is a nickel-copper alloy with excellent corrosion resistance and high strength characteristics, and is widely used in chemical engineering, marine engineering, aerospace and other fields. Its main ingredients include nickel (63% to 70%), copper (27% to 30%), aluminum (0.3% to 0.5%) and titanium (0.3% to 0.5%), and also contains a small amount of iron, manganese and sulfur. and carbon.

Mechanical properties

1. Tensile strength : The tensile strength of Monel K-500 is 1100 MPa in annealed state, the yield strength is 790 MPa, and the elongation is 20%.
2. Hardness : Brinell hardness is 85 B.
3. Massiveness and toughness : The Monel K-500 has good ductility and toughness, suitable for manufacturing components that withstand cyclic stress.
4. High temperature performance : Maintain high strength and good corrosion resistance at 650°C (1200°F).
5. Fatigue Strength : Monel K-500 has a high fatigue strength at room temperature, and the fatigue strength will increase as the temperature increases.

Thermal treatment
The Monel K-500 can optimize its performance through solution treatment and aging treatment. Solution treatment is usually performed between 1600°F and 2100°F (871°C to 1149°C) and then cooled quickly for optimal mechanical properties. Aging treatment can further improve the strength and hardness of the alloy.

Corrosion resistance
Monel K-500 exhibits excellent corrosion resistance in seawater, acidic and chloride environments. Its corrosion resistance mechanism is mainly attributed to the high nickel content, which can effectively improve the corrosion resistance of the alloy and prevent oxidation reactions on the metal surface.

Monel K-500 pipe fittings adhere to industry-standard dimensions (e.g., ASME/ANSI, DIN, EN) rather than material-specific sizing. The alloy’s corrosion resistance and mechanical properties make it suitable for high-performance applications, but the dimensions of fittings (e.g., elbows, tees, flanges) align with standard specifications. Below is a general guide to sizing conventions for Monel K-500 pipe fittings.

1. Common Standards for Pipe Fittings

• ASME/ANSI B16.9: Butt-weld fittings (elbows, tees, reducers).
• ASME/ANSI B16.11: Socket-weld and threaded fittings (couplings, unions).
• ASME B16.5: Flanges (raised face, ring joint).
• DIN/EN Standards: European sizing for flanges, valves, and tubing.

2. Nominal Pipe Size (NPS) Ranges

Monel K-500 fittings are typically available in sizes from 1/8″ NPS (6 mm) to 24″ NPS (600 mm), depending on the fitting type and application.

3. Example Size Chart for Butt-Weld Elbows (ASME B16.9)

Note: Wall thickness varies by schedule (e.g., SCH 10S is thinner than SCH 80S).

4. Flange Dimensions (ASME B16.5)

5. Tubing and Pipe Sizes

Monel K-500 seamless pipes/tubes are often supplied in:

• OD Range: 6 mm – 600 mm.
• Wall Thickness: 0.5 mm – 50 mm (varies by schedule or custom requirements).
• Lengths: Standard random lengths (6–7 meters) or cut-to-size.

6. Key Considerations

• Custom Sizes: Available for specialized applications (e.g., subsea oil tools, aerospace).
• Pressure Ratings: Determined by wall thickness (schedule) and flange class.
• Tolerances: Follow ASME B16.9/B16.11 (±1.5 mm for OD, ±0.8 mm for wall thickness).

7. Manufacturer Guidance

Exact dimensions for Monel K-500 fittings depend on:

• Fabrication method (seamless vs. welded).
• Application requirements (e.g., high-pressure vs. cryogenic use).
• Regional standards (ASME vs. DIN).

Application areas
Due to its excellent corrosion resistance and high strength characteristics, Monel K-500 is widely used in the following fields:

• Chemical equipment : pumps, valves, seals, etc.
• Marine engineering : ship fasteners, subsea structural parts, etc.
• Aerospace : engine components, turbine blades, etc.
• Papermaking industry : scraper blades, etc.

Summarize
Monel K-500 is a high-performance nickel-copper alloy with excellent corrosion resistance and high strength characteristics, suitable for high-performance applications in a variety of harsh environments. Its mechanical properties and corrosion resistance make it an ideal material in the fields of chemicals, marine engineering, aerospace and other fields.

Product Forms, Weldability, Workability & Heat Treatment of Monel K-500

Monel K-500 is a nickel-copper-based alloy with excellent corrosion resistance and high strength. It is widely used in marine engineering, chemical equipment, oil and gas mining, aerospace and other fields. Here are detailed information about the product format, welding, processability and heat treatment of the Monel K-500:

Product Form
Monel K-500 can be made in a variety of product forms, including wire, strip, sheet, pipe, rod, tube rod, forged blanks, forging parts and wires. These product forms are suitable for different industrial applications such as pump shafts, propeller shafts, scrapers, well drilling pipes, well casings, instruments and equipment, electronic components, springs and valve bushings, etc.

Weldability
Monel K-500 has good welding performance, mainly using tungsten gas protective welding method (GTAW) for welding, and using Monel filler metal 60 as the basic material. When welding, it is recommended to perform it in annealing state and eliminate welding stress before aging. The strength of the welded parts is the same as the hardened substrate, but requires welding using a ingredient filled metal provided by the matching supplier.

Processability
Monel K-500 has good processing properties and can be processed by conventional industrial methods. During hot processing, the deformation temperature range is 870°C to 1150°C, the annealing temperature during cold processing is 527°C to 583°C, the heating time is more than 3 hours, and then cooled to 482° at a rate of 4.82°C/s. C, then air-cool to room temperature. The annealed material has good ductility and processability, and is suitable for precision cutting.

Thermal treatment
The heat treatment process of Monel K-500 mainly includes annealing, aging and quenching. The annealing temperature is usually 820°C to 982°C and the cold-drawing material is 1038°C. Aging treatment can significantly increase the strength and hardness of the material, usually from 650°C to 760°C. Quenching treatment is used to improve the hardness and wear resistance of the material.

Performance Features

• Corrosion resistance : Monel K-500 shows excellent corrosion resistance in seawater, acid, alkali and other media, especially in high temperature and high pressure environments.
• Mechanical properties : After aging treatment, the yield strength of Monel K-500 can reach more than 690 MPa, the tensile strength can reach more than 1100 MPa, the elongation is about 10%, and the cross-section shrinkage is about 20%.
• High temperature performance : Monel K-500 maintains high strength and good ductility at high temperatures, and is suitable for high temperature environments.
• Low temperature performance : Monel K-500 remains high strength and ductility at -129°C.

Application areas
Monel K-500 is widely used in marine engineering, chemical equipment, oil and gas extraction, aerospace and other fields, especially in environments where corrosion resistance and high strength are required.

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