Hanging board Z type clevis are a very common hardware connector in foreign trade exports. They can be used for hanging, fixing, and load-bearing scenarios. During production, we will simultaneously meet product performance reliability, international market standards, and customer customization specifications to meet the needs of our foreign customers.
Material: In China, we usually choose Q235 standard, but when exporting to the United States, we choose A36 standard, and when exporting to Europe, we choose S235JR standard. When exporting to coastal areas, we also choose stainless steel. We have strict requirements for performance characteristics, including tensile strength ≥370MPa and yield strength ≥235MPa to ensure load-bearing capacity. For stainless steel, we require Cr ≥18%, Ni ≥8%, and 316 stainless steel contains Mo ≥2% to ensure corrosion resistance, ensuring product performance from the source.
Structural Design: The structure of the hanging board Z type clevis will affect the user's experience. The hook opening width needs to be controlled within ±0.2mm. For precision applications, it can be controlled within ±0.1mm according to user requirements. The plate thickness is designed to be 2-10mm according to load-bearing requirements, with a plate thickness tolerance of ±0.15mm. The hanging hole tolerance is H13, the hole position deviation is ≤0.2mm, the hole wall is burr-free, and the chamfer is ≥0.5×45°. For safe load-bearing, it must also meet the user's actual needs.
Dimensional standards: The internationally accepted tolerance principle is ISO 8015, the export to the United States follows ANSI B4.2, the export to the European Union follows EN ISO 286, and the export to Japan follows JIS B 0401. For customers who require customization, we strictly follow the drawings provided by the customer to ensure customer satisfaction.
Process requirements: When cutting materials, ensure that the cut is flat, burr-free and deformation-free, the bending angle tolerance is ±1°, there are no cracks or wrinkles at the bend, and the weld is free of porosity, slag inclusions and incomplete penetration. The material is then treated by quenching and tempering.
What surface treatment processes are required for Hanging board Z type clevis before export? Actually, there are many surface treatment processes, and production must be customized according to the user's needs. Different surface treatments have different applicable scenarios and execution standards. Below, we will introduce them in detail:
| Surface treatment methods | Applicable Scenarios | Implementation Standards | Performance requirements |
| Hot-dip galvanizing | Outdoors, damp environments | ISO 1461 (International), ASTM A123 (USA), EN ISO 1461 (EU) | The zinc coating thickness is ≥85μm, the adhesion is ≥3.5N/mm², and the salt spray test duration is ≥96 hours. |
| Electrogalvanizing | Indoor, mildly corrosive environment | ISO 4042 (International), ASTM B633 (USA) | Zinc plating thickness ≥10μm, passivation treatment (blue-white/colored), salt spray test ≥48 hours. |
| Passivation | Food, medical or high-cleanliness environments | ASTM A967 (USA), EN ISO 3651-2 (EU) | Passivation treatment removes surface impurities, leaving no oil stains or fingerprints; salt spray test ≥72 hours. |
For hanging board Z type clevis used in foreign trade exports, structural stability is crucial because they need to be used for extended periods in power facilities, and the structure determines the service life. To improve the product's cost-effectiveness, the following stability requirements apply:
Flatness: ≤0.3mm/m, which can prevent installation misalignment and uneven stress due to deformation during use;
Hole position accuracy: The hole position deviation between the suspension hole and the connection hole is ≤0.2mm, and the hole diameter tolerance is H13. During use, it can be precisely matched with pins and bolts, and there will be no shaking even after long-term use;
Weld reliability: The tensile strength of the weld is ≥ 85% of the tensile strength of the base metal, and there are no defects such as porosity, slag inclusion, or incomplete penetration. After welding, penetrant testing (PT) or ultrasonic testing (UT) is required to ensure that the weld is free of internal cracks.
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