Nickle Alloy Metal Flat Gasket Rings Monel 400 Gasket Oval Ring
Nickle Alloy Gasket Rings Monel 400 Oval Ring Sealing W.Nr. 2.4360 EV Compartments
Nickle Alloy Gasket Rings :
1. Metal Flat Gasket: Made of solid metal through machining, used for sealing in pressure vessels, towers, tanks, valve covers, and other applications.
2. Metal Corrugated Gasket: Metal corrugated gaskets are made by pressing, rolling, or turning metal flat rings into concentric wave-shaped circles, with non-metals such as expanded graphite or PTFE bonded to the surface.
3. Metal Toothed Gasket: Generally, a precision lathe is used to machine concentric grooves on both sides of a metal stainless steel flat gasket. Depending on the medium, materials such as flexible graphite, PTFE, asbestos-free sheet, or other soft metals can be bonded to both sides of the gasket.
4. Metal Ring Gasket: Metal ring gaskets are solid metal gaskets with cross-sectional shapes of octagonal or oval, providing radial self-sealing action.
5. Metal Lens Gasket: Metal lens gaskets are often used in high-pressure pipe connections, offering good sealing performance, with a nominal pressure range of 16.0-32.0 Mpa.
6. Metal O-Ring: Metal O-rings consist of a hollow metal ring filled with an inert gas, with the outer ring generally made of alloy material.
Monel 400 (UNS NO4400/W.Nr. 2.4360) is a nickel-copper alloy (about 67% Ni- 23% Cu) that is resistant to sea water and steam at high temperatures aswel as to salt and caustic solutions. Aloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloyexhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowingbrackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to avariety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions.
Pickling
Pickling can produce bright, clean surfaces on Alloy 400.
Fabricating
Alloy 400 is readily fabricated by standard processes.
Hot Forming
One procedure for producing forgings to such specifications consists of taking 30-35% reduction following the final reheat.
This is accomplished as follows:
- Reheat
- Forge to a section having about 5% larger area than the final shape (take at least 25% reduction)
- Cool to 1300°F
- Finish to size (5% reduction). High-tensile forgings, as described in certain specifications, also require a minimum of 30-35% reduction following the last reheat.
High-tensile forgings, as described in certain specifications, also require a minimum of 30-35% reduction following the last reheat. This is taken in the following manner:
- Reheat
- Forge to a section having an area about 25% larger than the final shape (take about 5% reduction)
- Cool to 1300°F
- Finish to size (25% reduction). Grain refinement is achieved by using a temperature of 2000°F for the final reheat and by increasing the amount of reduction taken after the last reheat.
Cold Forming
Alloy 400 is adaptable to virtually all methods of cold fabrication. The forces required and the rate of work hardening are intermediate between those of mild steel and Type 304 stainless steel.
Chemical Composition:
| Element | C | Si | Mn | S | Cu | Fe | Ni+Co | Co |
| Minimum(%) | - | - | - | - | 28 | - | 63 | - |
| Max(%) | 0.3 | 0.5 | 2 | 0.024 | 34 | 2.5 | 70 | 2 |
Nature:
| State | Approximate tensile strength (N/mm²) | Approximate Operating Temperature(°C) |
| Annealing | 400-600 | -200 to +230 |
| Elastic tempering | 800-1100 | -200 to +230 |
Tensile Properties of MONEL Alloy 400 at Low Temperatures:
| Temper | Temperature, °F | Tensile Strength, ksi | Yield Strength (0.2% Offset), ksi | Elongation, % | Reduction of Area, % |
| Cold-Drawn | Room | 103.80 | 93.70 | 19.0 | 71.0 |
| -110 | 117.45 | 100.85 | 21.8 | 70.2 | |
| Rooma | 103.40 | 93.30 | 17.3 | 72.5 | |
| Forged | 70 | 92.00 | 67.00 | 31.0 | 72.7 |
| -297 | 128.25 | 91.50 | 44.5 | 71.8 | |
| -423 | 142.00 | 96.40 | 38.5 | 61.0 | |
| Annealed | 70 | 78.65 | 31.30 | 51.5 | 75.0 |
| -297 | 115.25 | 49.50 | 49.5 | 73.9 | |
| aHeld at -110°F for several hours prior to testing at room temperature. | |||||
Our QC Activities and Test Methods:
| Chemical Analysis | ASTM E1473ensile | Test | ASTM E8 |
| Hardness Test | ASTM E 10,E 18 | PMl Examination | DINGSCO SOP |
| Ultrasonic NDT | BS EN 10228 | Liquid Penetrant NDT | ASTM E 165 |
| Dimensional and inspection | DINGSCO SOP | Roughness Test | DINGSCO SOP |
| Impact Test | ASTM E 23 | Low Temperature lmpact Test | ASTM E 23 |
| Creep and Stress Rupture Test | ASTM E 139 | Hydrogen Induced Cracking Test | NACE TM-0284 * |
| Inter Granular Corrosion Test | ASTM A 262 * | Sulfide Stress Corrosion Cracking Test | NACE TM-0177 * |
| Pitting and Crevice Corrosion Test | ASTM G 48 * | Macro Etching Test | ASTM E 340* |
| Grain Size Test | ASTM E 112 * |
* Done by state own third party laboratory
Processing Flow Chart:
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