A piston ring is broadly defined as a ring-shaped, non-stainless steel, iron alloy that is nitrided, and includes between about 1% and about 10% chromium by weight, and preferably includes between about 1% and about 2% chromium by weight, with additional alloying elements also included.

Un anneau de piston est largement défini pendant qu'un acier de forme annulaire et non-inoxidable, l'alliage de fer qui est nitrided, et inclut chrome entre environ 1% et environ 10% en poids, et inclut de préférence chrome entre environ 1% et environ 2% en poids, avec les éléments d'alliage additionnels également inclus.

 
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