点击图片查看大图Diameter: 17 (mm) ring groove number: 2 ring structure: slotting ring
Piston ring section shape: steel oil ring surface carburized depth: 0.4 surface hardness: HRA78-83
Material: twenty cr origin: zhejiang applicable larger superkings cars: hongqiao
Suitable model: internal combustion engine pin hole × pin length: 12 * 57 (mm) compression height: 57 (mm)
According to general tolerance: 0.005 center hardness: HRC35-43 total height: 57 (mm)
1. The outside surface no crack, scallops, sesame, touch mark, burr defect. Bore no oxidation corrosion.
2. After carburizing and quenching, carburizing layer not more than 40% of the total thickness, the surface carburized layer depth of 0.3-0.5, the surface hardness HRA78-83, with product hardness difference not more than three units.
The core hardness HRC35-45, quenching after clear oil dirties impurity.
3.. According to GB/T 1804-2000 regulations.