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Aluminum Custom Gasket: Dimensions, Material Grades, and Quotation Requirements
Quick Answer: CORASEALS supplies aluminum custom gaskets cut or machined to the customer drawing. Send the aluminum grade, ID, OD, thickness, flange or groove dimensions, operating temperature, medium, pressure, surface finish, drawing or sample, and required quantity for a quotation.
An aluminum custom gasket is a flat metal gasket cut or machined to a specific drawing or sample. The profile can be round, rectangular, irregular, or made with bolt holes and cutouts. CORASEALS quotes each aluminum custom gasket from the drawing, the material grade, and the application conditions.
Buyers searching for an aluminum custom gasket supplier need more than a standard size chart. CORASEALS reviews the alloy, the sealing face, and the operating conditions. This reduces quoting mistakes and helps avoid a gasket that fits the drawing but fails in service.
What to Define Before Ordering an Aluminum Custom Gasket
The main dimensions for an aluminum custom gasket are inside diameter, outside diameter, and thickness. The buyer should also define the bolt hole size, bolt circle diameter, number of holes, and any slotted holes or tab extensions. If a standard flange size is used, the gasket must still match the actual sealing surface. Nominal pipe size alone is not enough.
If no drawing exists, CORASEALS can work from a scan, a sample photo, or a hand sketch with the key dimensions. The drawing should show the sealing face, the cutout profile, and any critical tolerances.
Aluminum custom gaskets can be flat, ring type, shim type, or cover gaskets. Some applications require a thin aluminum seal for electrical continuity or heat transfer. Other applications use a thicker aluminum ring as a distance piece or shim.
Aluminum Grades for Custom Gaskets
The common aluminum grades for custom gaskets are 1100, 3003, 5052, and 6061. Each grade has a different balance of softness, strength, and corrosion resistance.
| Aluminum grade | Typical feature | Common gasket use |
|---|---|---|
| 1100 | Commercially pure, soft, good formability | Low pressure cover gaskets, electrical enclosure seals, dust seals |
| 3003 | General purpose, good formability | Light duty custom cut gaskets and access cover gaskets |
| 5052 | Higher strength, good corrosion resistance | General industrial and marine environment gaskets |
| 6061 | Heat treatable, machinable | Machined aluminum gaskets, shims, and structural sealing parts |
Soft grades such as 1100 and 3003 conform to minor flange irregularities. Harder grades such as 5052 and 6061 can handle higher mechanical load but may need a smoother flange surface. CORASEALS does not assign a universal pressure or temperature rating for aluminum gaskets. The service limit changes with the alloy, thickness, flange design, and medium.
Common Applications for Aluminum Custom Gaskets
Aluminum custom gaskets appear in low and moderate temperature sealing joints. Typical uses include access covers, gearbox covers, light duty flange connections, electrical equipment enclosures, heat exchanger covers, and pump or compressor covers. Some thin aluminum gaskets are also used where electrical continuity or heat transfer is required across the joint.
Aluminum is not the right choice for every chemical service. Strong acids, strong alkalis, and some halogenated media can attack aluminum. High temperature steam or aggressive chemical flanges usually require a different gasket material. CORASEALS checks the medium, temperature, and flange load before recommending an aluminum grade.
Cutting and Machining Options
Aluminum custom gaskets can be waterjet cut, laser cut,