Spring (SST 1-13/16×1-15/16, SKU:18920A000) Fabricated from ASTM A276 316L stainless steel with cold drawing and solution annealing (1050°C water quench), tensile strength ≥580MPa. Electropolished surface (Ra≤0.2μm) extends fatigue life by 25%, API 7K compliant for mud pump safety valve systems. Salt spray resistance >1000hrs, operating temp -196°C~427°C.
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