Polishing Stainless Steel Propellers

Material Composition: These propellers are fabricated from two types of high - performance stainless steels. AISI 316L austenitic stainless steel, containing C≤0.03%, Cr 16 - 18%, Ni 10 - 14%, and Mo 2 - 3%, showcases remarkable corrosion resistance, with a corrosion rate not exceeding 0.05 mm/year in a 3.5% NaCl solution, making it a prime choice for harsh, high - salt marine environments. 420SS martensitic stainless steel, characterized by Cr 12 - 14% and C 0.15 - 0.4%, offers a hardness of HRC≥22, which is 30% more wear - resistant than common copper alloys. Its cavitation resistance index, reaching ≥4.5 according to ISO 1521, ensures reliable operation under heavy - load conditions.

Product Features

• Corrosion Resistance: Chromium and nickel in the steel form a protective layer, resisting seawater corrosion.
• Efficient Propulsion: The polished surface reduces water resistance, improving fuel economy and speed while minimizing vibrations and noise.
• High Strength: Withstands strong forces during operation, less prone to deformation or breakage.
• Aesthetic Appeal: The sleek finish adds elegance to vessels.

  Manufacturing Process:​

  5-axis CNC machining: Blade profile accuracy ±0.05 mm, surface roughness Ra≤3.2 μm.​

  Non-destructive testing: 100% ultrasonic testing (UT) and liquid penetrant testing (PT), compliant with ISO 6892-1.​

  Certifications: Meet IMO SOLAS Chapter II-1, ABS Marine Propeller Standards, and DNV GL-ST-N0010.

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Applications

Application Scenarios

• Applications and Case Studies​

  Ice-Class Vessels:​

  Meets PC3-PC5 ice class rules (e.g., DNV GL Polar Code), maintaining ≥95% impact resistance at -40°C, capable of breaking ≤300 mm ice.​

  Case study: MV Arctic Sky using SB-1800-4 propeller improved ice-breaking efficiency by 20% and reduced fuel consumption by 15%.​

  High-Corrosion Waters:​

  Lifespan 2-3 times longer than copper alloys in H₂S≤50 ppm or Cl⁻≥10,000 ppm environments.​

  Environmental Compliance:​

  Zero copper ion release (≤0.01 mg/L), meeting MEPC.279(70) standards for eco-protected areas.

• Controllable Pitch Propeller (CPP):​

  Pitch adjustment range: -10° to +30°, response time ≤15 seconds (hydraulic drive).​

  Efficiency improvement: 8-12% higher propulsion efficiency than fixed-pitch propellers under variable conditions (ISO 15016 data).

Each blade is precisely cut and shaped for optimal hydrodynamic performance. The connection between the hub and blades is strong, guaranteeing power transfer. The mirror - like polish is achieved through a multi - step process.

Our advanced production facilities and strict quality control ensure high - standard products. Our polishing stainless steel propellers are certified by ISO 9001:2000, CCS, BV, LR, RINA, ABS, RS, NK, DNV, and GL, meeting top - tier international marine standards.