60SiCrA — Si-Cr spring steel for high-temperature service to 250 C. For diesel engine valve springs, turbocharger spring elements and elevated-temperature industrial springs.
60SiCrA per Chinese GB/T 1222 (similar to EN 60SiCr7 / 1.7108). Si addition raises the elastic limit and retains spring properties at elevated temperatures — service to 250 C vs 150 C for standard 51CrV4. Standard for diesel engine valve springs operating near exhaust ports, turbocharger wastegate springs and steam valve springs where 51CrV4 would relax.
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