AUTOMOTIVE AND LARGE BORE ENGINE APPLICATIONS. Piston Rings and Piston Ring Elements Cast Iron Materials

Transcription

1 UTOMOTIVE ND LRGE BORE ENGINE PPLICTIONS Issue date: and Piston Ring Elements Cast Iron Materials Designation Reference Grade Hardness KS MED E DIN GOE 12 K unalloyed, non heat-treated grey HRB GOE 13 K T GOE 32 K Z GOE unalloyed, non heat-treated grey alloyed, heat-treated grey with carbides malleable HRB HRB HRB GOE 52 K 9 47 J spheroidal graphite HRB GOE 56 K spheroidal graphite HRC

2 GOE 12 Reference: K1, MED 47, MC 13, E 210 Issue date: Non heat-treated grey, according to ISO , subclass 12 C: Si: Mn: P: S: max 0.13 Cr: V: max 0.15 Cu: predominantly flaky and uniformly distributed pearlite, ferrite not exceeding 5 % Phosphide eutectic: evenly distributed Hardness: HRB HB Bending strength: min 350 MPa Modulus of elasticity: MPa typical MPa strongly etched 20 : 1 Note: The analysis ranges are designed to allow for different cross sections. Variations are admissible on condition that the structure and mechanical properties are not adversely affected. The hardness data are averages of three measurements on a single ring: 1 st measurement at the gap, 2 nd measurement 90 from the gap, 3 rd measurement diametrically opposite the gap. Hardness testing to DIN EN and DIN EN However, the minimum distance between the middle of the impression and the edge of the specimen must be 1.5 mm. For specimens with narrower test surfaces or with cross sections having an insufficiently high bearing capacity for test loads, the hardness can be measured to DIN In this case the limit values must be appropriately adjusted by means of comparative measurements. The modulus of elasticity is determined at a bending stress of 200 MPa.

3 Reference: K25, MED 47T Material Specification GOE 13 Unalloyed non heat-treated flake graphite, according to ISO , subclass 13* C: Si: Mn: P: S: max 0.15 Cr: V: max 0.2 Cu: predominantly flaky and uniformly distributed pearlite, ferrite not exceeding 5 % Phosphide eutectic: predominantly non-continuous network Hardness: HRB HB Bending strength: min 420 MPa Modulus of elasticity: MPa strongly etched 20 : 1 * ISO / Draft Sept Hardness testing to DIN EN and DIN EN The minimum permissible distance between the middle of sections having an insufficiently high bearing capacity for the test loads (e.g. slotted oil rings), the hardness can be measured in HV5 to DIN , the applicable range being HV5. The modulus of elasticity is determined at a bending stress of 200 MPa.

4 GOE 32 Reference: K11 (F14), MED 47Z Carbidic, according to ISO , subclass 32* C: Si: Mn: P: max 0.35 S: max 0.15 Cr: V: Mo: Ni: Cu: Ti: max 0.3 W: Nb: Phosphide eutectic: fine-flaked, punctiform tempered martensite with uniformly distributed punctiform tending to non-continuous network Hardness: HRB HRC Bending strength: min 650 MPa Bending strength: MPa * ISO /Draft Sept Hardness testing to DIN EN and DIN EN The minimum permissible distance between the middle of sections having an insufficiently high bearing capacity for the test loads, the hardness can be measured in HV5 to DIN 50133, whereby the limit values are to be ascertained based on comparative measurements. The modulus of elasticity is determined at a bending stress of 250 MPa.

5 Reference: E 222 Material Specification GOE 44 Issue date: Malleable, according to ISO , subclass 44 * C: Si: Mn: P: max 0.5 S: max 0.1 Cr: V: uniformly distributed temper graphite aggregates pearlite containing 2-10 % (by area) of small well distributed complex alloy carbides. Some spheroidisation may be present. Hardness: HRB HRC Bending strength**: min 800 MPa Modulus of elasticity: min MPa * ISO / Draft ug ** n exact determination of the bending strength as per material specification B 14 is not possible owing to the high ductility of the material. 2 nd measurement 90 from the gap; 3 rd measurement diametrically opposite the gap. Hardness testing to DIN EN ISO The minimum permissible distance between the middle of the impression and the edge of the specimen is 1.5 mm. For specimens with narrower test surfaces or with cross sections having an insufficiently high bearing capacity for the test loads, the hardness can be measured in HV5 to DIN , whereby the limit values are to be ascertained based on comparative measurements.

6 GOE 52 Reference: K9 (KV1), MED 47J, E 227 Spheroidal graphite, according to ISO , subclass 52* C: Si: Mn: max 0.5 P: max 0.3 S: max 0.05 Cr: max 0.2 Cu: max 1.0 Mg: max 0.1 roughly spheroidal tempered martensite, isolated carbide particles are acceptable Hardness: HRB HRC Bending strength**: min 1300 MPa Modulus of elasticity: min MPa Coefficient of thermal expansion 10-6 /K: C: 10.0 Density: 7.3 g/cm 3 * ISO / Draft Sept ** n exact determination of the bending strength as per material specification B 14 is not possible owing to the high ductility of the material. Hardness testing to DIN EN and DIN EN The minimum permissible distance between the middle of sections having an insufficiently high bearing capacity for the test loads, the hardness can be measured in HV5 to DIN , whereby the limit values are to be ascertained based on comparative measurements.

7 GOE 56 Reference: K 22 (KV4), MED 130, E 232 Spheroidal graphite, according to ISO , subclass 56* C: Si: Mn: max 0.5 P: max 0.3 S: max 0.05 Cr: max 0.2 Cu: max 1.0 Mg: max 0.1 roughly spheroidal tempered martensite, isolated carbide particles are acceptable Hardness: HRC HB Bending strength**: min 1300 MPa Modulus of elasticity: min MPa Coefficient of thermal expansion 10-6 /K: C: 10.0 Density: 7.3 g/cm 3 * ISO / Draft Sept ** n exact determination of the bending strength as per material specification B 14 is not possible owing to the high ductility of the material. Hardness testing to DIN EN and DIN EN The minimum permissible distance between the middle of sections having an insufficiently high bearing capacity for the test loads, the hardness can be measured in HV5 to DIN 50133, whereby the limit values are to be ascertained based on comparative measurements.