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Goetze STD Piston Rings for 4-Stroke Large Bore Engines The STD ring material is characterized by a fine-lamellar graphite structure in a pearlitic matrix and has good conformability due to a relatively low modulus of elasticity. Non heat-treated grey cast iron Main applications: compression rings, oil control rings Good conformability ISO 6621-3, subclass 12 Minimum bending strength: 350 MPa Modulus of elasticity: 85 - 115 GPa Ring diameter range: ≤ 700 mm
Federal-Mogul Corporation