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Features:
High Strength and High Yield Ratio: This is the fundamental requirement, ensuring that the fastener does not plastically deform or fracture under high tensile loads.
Good Relaxation Resistance: The ability to maintain clamping force under long-term vibration and stress, preventing loosening.
Sufficient Toughness and Ductility: Prevents brittle fracture during installation (e.g., tightening) or upon impact.
Good Hardenability: Ensures uniform properties across the cross-section, resulting in consistent mechanical performance.
Certain Corrosion Resistance: Depending on the service environment, surface treatments (e.g., zinc plating, phosphating) or steel grades with corrosion-resistant elements (like Chromium) may be used.
