As the core component of a high-pressure common rail fuel injection system, the common rail injector requires materials that meet rigorous standards-specifically, high strength, high-temperature resistance, corrosion resistance, and superior wear resistance.
Injector Body and Critical Structural Components: Typically fabricated from high-strength alloy steels or specialized alloy materials to withstand fuel pressures reaching 2000–2500 bar, as well as frequent, high-frequency operational cycles.
Fasteners (e.g., Retaining Nuts): Specifically utilize high-strength alloy materials characterized by excellent corrosion resistance, high-temperature strength, and wear resistance.
Fuel Rail: The predominant material is stainless steel, accounting for approximately 63% of the market share; this underscores the high demands placed on corrosion resistance and sealing integrity within high-pressure common rail systems.
Fundamentally, the core materials employed consist of high-performance alloy steels or specialized alloys, ensuring reliability and longevity even under extreme operating conditions.
