Engine piston pins, also known as wrist pins, connect the piston to the connecting rod in marine engines. These precision components ensure smooth piston movement and withstand high stress and heat. Marine engine spares like piston pins are critical for maintaining engine performance and longevity.

Engine Piston Pins:

- Size: 20mm to 200mm diameter, 50mm to 300mm length

- Grade: High-grade alloy steel (AISI 8620, EN 24, SAE 4140)

- Material: Hardened and tempered steel, case-hardened for wear resistance

- Surface Finish: Precision ground, 0.2-0.4 µm Ra

- Hardness: 58-62 HRC (surface), 30-40 HRC (core)

- Tolerance: H6/g6 or H7/f7 fit

- Lubrication: Oil-impregnated or pressure-fed

Marine Engine Spares:

- Size: Varies by component (e.g., bearings 50-500mm, valves 10-150mm)

- Grade: ASTM A148, ASTM A297, or marine-grade stainless steel (316L)

- Material: Cast iron, forged steel, bronze, or nickel-aluminum alloys

- Viscosity (lubricants): SAE 30 to SAE 50 for marine engines

- Buoyancy: Corrosion-resistant coatings for seawater exposure

- Pressure Rating: 150-300 bar (piston rings, gaskets)

- Temperature Range: -20°C to +300°C (depending on application)

Yes, Engine Piston Pins and Marine Engine Spares typically comply with maritime standards such as ISO 9001, ISO 14001, and classification society standards like ABS, DNV, LR, or BV, depending on the manufacturer and specific product specifications.