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Goetze K4 Piston Rings for 4-Stroke Large Bore Engines KV4, a low-alloyed heat-treated nodular cast iron, is a preferred material for compression rings. For increased stresses a higher hardness is created by varying the martensite morphology. Bending strength > 1300 MPa with a high modulus of elasticity. Spheroidal graphite cast iron Main applications: compression rings High bending strength, high modulus of elasticity ISO 6621-3, subclass 56 Minimum bending strength: 1300 MPa Modulus of elasticity: min. 150GPa Ring diameter range: ≤ 1000 mm
Federal-Mogul Corporation