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Monel 400, also known as K400, is a nickel-copper alloy renowned for its exceptional corrosion resistance and strength. It is widely used in industrial applications where durability and resistance to harsh environments are critical. Monel 400/K400 Sheet, Plate, and Coil provide versatile solutions for fabrication and construction in demanding industries.
Monel 400 primarily consists of nickel (around 63%) and copper (about 28–34%), with small amounts of iron, manganese, carbon, and silicon. This unique composition ensures excellent resistance to seawater, steam, and chemical corrosion while maintaining structural integrity at elevated temperatures.
One of the key features of Monel 400/K400 is its superior resistance to corrosion in both oxidizing and reducing environments. It performs exceptionally well against seawater, hydrofluoric acid, and sulfuric acid, making it ideal for marine applications, chemical processing, and desalination plants.
Monel 400/K400 offers high tensile and yield strength, along with good elongation and toughness. These mechanical properties make it suitable for heavy-duty applications where the material must endure high stress, impact, or fluctuating loads without deformation.
Monel 400/K400 Sheets, Plates, and Coils are used in heat exchangers, valves, pumps, pressure vessels, and piping systems. Coils are particularly useful for custom fabrication, while plates and sheets provide structural support in machinery and industrial equipment.
Monel 400/K400 is highly workable, allowing for cutting, bending, rolling, and welding. Specialized welding procedures maintain its corrosion resistance and mechanical properties, ensuring that fabricated components retain their performance in harsh environments.
The alloy maintains its strength and corrosion resistance across a wide temperature range, typically up to 1000°F (540°C). This makes it suitable for both high-temperature processing and cryogenic applications.
Compared to other nickel-copper alloys, Monel 400/K400 offers a unique combination of corrosion resistance, toughness, and fabricability. It outperforms stainless steels in marine and chemical environments and provides better mechanical strength than pure nickel in many applications.
Specification Table
| Specification | Monel 400 / K400 |
|---|---|
| Alloy Type | Nickel-Copper Alloy |
| Form | Sheet, Plate, Coil |
| Standards | ASTM B127, ASTM B166, ASTM B165, ASTM B164, ASTM B575 |
| Nickel (Ni) | 63% min |
| Copper (Cu) | 28–34% |
| Iron (Fe) | 2.5% max |
| Manganese (Mn) | 2.0% max |
| Carbon (C) | 0.3% max |
| Silicon (Si) | 0.5% max |
| Density | 8.80 g/cm³ |
| Melting Point | ≈ 1300–1350°C |
| Temperature Range | -100°C to 540°C |
| Corrosion Resistance | Excellent in seawater, acids, and alkaline environments |
| Applications | Marine equipment, chemical processing, valves, pumps, heat exchangers |
Chemical Composition (Typical ranges for SSSheet)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 63 min |
| Copper (Cu) | 28–34 |
| Iron (Fe) | 2.5 max |
| Manganese (Mn) | 2.0 max |
| Carbon (C) | 0.3 max |
| Silicon (Si) | 0.5 max |
| Other elements | Trace |
Mechanical Properties (Typical)
| Property | Monel 400 / K400 |
|---|---|
| Density | 8.80 g/cm³ |
| Tensile Strength | 550–750 MPa |
| Yield Strength | 200–450 MPa |
| Elongation | 30–45% |
| Hardness (Brinell) | 150–220 HB |
| Modulus of Elasticity | 140 GPa |
| Melting Point | ≈ 1300–1350°C |
| Thermal Conductivity | 21 W/m·K |
| Electrical Resistivity | 49 μΩ·cm |
| Temperature Range | -100°C to 540°C |
Equivalent Grades
| Standard / Specification | Equivalent Grade |
|---|---|
| ASTM B127 | Monel 400 |
| ASTM B166 | Monel 400 |
| ASTM B165 | Monel 400 |
| ASTM B164 | Monel 400 |
| ASTM B575 | Monel 400 |
| UNS | N04400 |
| EN / DIN | 2.4360 |
| JIS | MONEL K-400 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Thickness (mm) | Width (mm) | Length (mm) | Weight per Sheet / Coil (kg) |
|---|---|---|---|
| 1.0 | 1000 | 2000 | 17.6 |
| 2.0 | 1250 | 2500 | 55.0 |
| 3.0 | 1500 | 3000 | 119.0 |
| 5.0 | 1500 | 6000 | 396.0 |
| 6.0 | 2000 | 6000 | 633.6 |
| 8.0 | 2000 | 6000 | 844.8 |
| 10.0 | 2000 | 6000 | 1056.0 |
Common Types Of Sheets
Shim Sheet
Perforated Sheet
Chequered Plate
Coil
Strips
Foil
Hot Rolled Sheets
Cold Rolled Plate
Matt PVC Sheet
Frequently Asked Questions (FAQ)
What is Monel 400/K400?
Monel 400, also known as K400, is a nickel-copper alloy with excellent corrosion resistance and high strength. It is commonly used in marine, chemical, and industrial applications.
What forms does Monel 400/K400 come in?
It is available in sheet, plate, and coil forms, making it versatile for fabrication, structural, and industrial applications.
What is the chemical composition of Monel 400/K400?
Monel 400/K400 consists mainly of nickel (≈63%) and copper (28–34%), with small amounts of iron, manganese, carbon, and silicon.
What are the mechanical properties of Monel 400/K400?
It has tensile strength of 550–750 MPa, yield strength of 200–450 MPa, elongation of 30–45%, and excellent hardness and toughness.
What are the applications of Monel 400/K400?
Common applications include marine engineering, chemical processing equipment, valves, pumps, heat exchangers, and piping systems.
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