DIN436 - Q235 Carbon Steel - Grade C, B, A - Grade 4.8 - Black Oxide
Product Details
Product Name: Yongjing Square Washer / Irregular Washer
Technical Standard: DIN436
Product Grade: Grade C, Grade B, Grade A
Performance Grade: Grade 4.8
Material: Q235 Carbon Steel
Surface Treatment: Black Oxide
Product Type: Square Washer / Irregular Washer Structure
Product Specifications
Detailed product specifications can be provided according to customer requirements, including overall size, inner diameter, thickness, irregular shape parameters and other key parameters.
Product Description
Product Overview
This product is a square washer/irregular washer complying with the DIN436 standard, manufactured from Q235 carbon steel with a performance grade of 4.8 and achieving Grade A precision. Its shape is square or irregular as specified by the standard, designed to fit specific connection surfaces or electrical connections. The surface is treated with black oxide to form a dense black oxide film, which mainly plays the role of rust prevention and decoration. It is suitable for occasions such as electrical equipment and mechanical connections that require gaskets of specific shapes for insulation, positioning or increasing the contact surface.
Core Advantages
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Specific Shape Adaptation: The square or irregular shape design is specially used to fit standardized installation positions (such as some electrical equipment terminals) or provide greater anti-rotation capacity.
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High Economic Practicality: Q235 carbon steel material and Grade 4.8 performance have significant cost advantages while meeting the requirements of conventional mechanical properties.
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Basic Rust Prevention and Decoration: Black oxide treatment provides basic rust prevention ability and a neat black appearance, improving product aesthetics.
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High Standard Compliance: Complying with the international standard DIN436, it has precise dimensions and specifications, ensuring interchangeability and reliability in applicable equipment (especially common in low-voltage electrical equipment).
Applicable Industries
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Marine and Offshore Engineering: Seawater corrosion-resistant connections such as marine equipment, seawater pipeline systems, offshore platforms, and mooring equipment.
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Chemical and Process Industry: Corrosive environments in contact with chemical media such as pumps, valves, pipe flanges, and reaction equipment.
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Power and Electrical Equipment: Conductive or non-magnetic occasions such as grounding systems, busbar connections, non-magnetic electrical cabinets, and generators.
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Water Supply and Sewage Treatment: Facilities that are in humid or water treatment chemical environments for a long time, such as valves, filters, and pump stations.
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Mining and Mineral Processing: Wear-resistant and slightly corrosion-resistant connection parts such as slurry pumps, mineral processing equipment, and conveying systems.
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Aerospace and National Defense: Parts requiring corrosion resistance, explosion-proof and non-magnetic properties such as fuel systems, hydraulic pipelines, and navigation equipment.
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Construction and Art Decoration: Outdoor projects requiring aesthetics and durability such as high-end building curtain walls, bridge decorations, and sculpture installation.
Warm Tips
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The rust prevention ability of the black oxide layer is limited, which is mainly suitable for indoor dry environments. The rust prevention effect will decrease significantly in humid or corrosive environments.
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Please confirm the accurate shape (square washer or irregular washer) and size of the washer according to the equipment drawings or original accessories to ensure correct installation.
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In electrical connection occasions requiring higher rust prevention level or conductivity, it is recommended to choose galvanized or copper gaskets.
