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2026
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09
Expansion Alloy Plate Precision: Grades, Specifications, and Surface Options
Expansion alloy plate precision is an important consideration when selecting thin alloy plates for applications that require controlled dimensions and consistent material quality. Expansion alloys such as 4J29, 4J33, 4J36, and 4J42 are commonly selected according to their thermal expansion characteristics and application requirements. The referenced product range covers thin plate and strip materials with thicknesses from 0.03 to 1.0 mm and widths from 10 to 450 mm, providing options for different component designs and processing needs. Precision is specified at 0.03–0.1 mm with a stated tolerance of ±0.005 mm, while available surface finishes include 2B and 1D.
Available Grades and Specifications
The available grades include 4J29, 4J33, 4J36, and 4J42. These expansion alloy grades can be selected based on the required thermal expansion behavior, joining requirements, and intended component structure. The thin material range is suitable for applications where controlled plate thickness and width are important during subsequent forming, cutting, stamping, or assembly processes.
The specified thickness range is 0.03–1.0 mm, with widths available from 10 to 450 mm. For precision requirements, the supplied specification gives a range of 0.03–0.1 mm and a tolerance of ±0.005 mm. These dimensional characteristics make the material suitable for components where consistent geometry is important.
Surface Finish and Hardness
Surface condition can affect processing and the final appearance of expansion alloy components. The available surface finishes are 2B and 1D, allowing users to select a finish according to fabrication and application requirements.
Delivery hardness options include Soft Condition, 1/2H, 3/4H, and Y, while custom hardness can also be arranged according to the required processing condition. Softer material can be useful for forming operations, while harder conditions may be selected when greater resistance to deformation during handling or processing is required.
Applications and Material Selection
Expansion alloy plates can be used in precision components where controlled thermal expansion is an important material characteristic. Depending on the selected grade and component design, potential applications include electronic components, sealing structures, precision instruments, and assemblies that combine metals with different thermal expansion behaviors.
When selecting a plate, buyers should consider the alloy grade, required thickness and width, dimensional precision, surface finish, hardness condition, and applicable material standard. It is also important to match the grade with the actual operating environment and fabrication process rather than selecting a material based only on dimensional specifications.
Standards
The referenced products are supplied according to standards including YB/T5231-05, YB/T5235-05, and YB/T5241-05. These standards provide a basis for material selection and specification control. For projects with strict dimensional or processing requirements, the purchase specification should clearly identify the required grade, dimensions, tolerance, surface condition, hardness, and applicable standard.
Conclusion
Expansion alloy plate precision depends on both material grade and dimensional control. With grades 4J29, 4J33, 4J36, and 4J42, thicknesses of 0.03–1.0 mm, widths of 10–450 mm, and different surface and hardness conditions, this product range can accommodate various precision component requirements. Careful selection of grade, precision, surface finish, hardness, and standard helps ensure that the plate is suitable for its intended processing and application.
Expansion alloy plate precision
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