Stainless steel semi-hollow cylindrical pin with round head pin - Marine mechanical parts and hardware

Application Scenarios and Characteristics of Stainless Steel Pins in Shipbuilding Industry

1. Typical Application Scenarios

• Hull structure & deck machinery
   
  Connection and positioning for hatch covers, rudders, hinges, brackets, deck cranes, winches and other movable components.
• Ship outfitting parts
   
  Hinges of doors, windows, hatches, handrails, ladders, marine furniture and assembly mechanisms.
• Propulsion & steering system
   
  Positioning pins for connecting rods, rocker arms, linkages and transmission components.
• Marine piping & valves
   
  Positioning and locking pins for valve actuators, dampers, quick‑release clamps and pipe supports.
• Offshore & marine equipment
   
  Quick‑release pins for life‑saving equipment, davits, lifting appliances, container locks and movable modules.
• Marine electrical equipment
   
  Positioning pins for electrical cabinets, control consoles, junction boxes and fixed brackets.

2. Core Technical Characteristics

2.1 Structural Design Advantages

• Precise positioning: High concentricity and fit clearance, ensuring stable assembly and alignment.
• Shear resistance: Mainly bears shear force, suitable for hinged and rotating connections.
• Easy installation & disassembly: Can be fitted with cotter pins, circlips or locking grooves for quick assembly.
• Stable connection: Prevents radial movement and ensures reliable operation under vibration.

2.2 Material & Corrosion Resistance

• Main materials: AISI 304, 316, 316L, duplex stainless steel 2205 / 2507.
• Excellent corrosion resistance: Resists seawater, salt spray, humidity and marine atmospheric corrosion.
• Surface treatment: Passivation, electropolishing, mechanical polishing to improve corrosion resistance and appearance.
• Compliance: Meets marine corrosion protection standards and marine classification requirements.

2.3 Mechanical Performance

• High shear strength: Stable mechanical properties under alternating load and impact.
• Good toughness: Resists fracture under ship vibration, wave impact and mechanical shock.
• Fatigue resistance: Suitable for long‑term dynamic load and repeated opening‑closing movements.
• Dimensional stability: Small deformation, ensuring long‑term fit accuracy.

2.4 Processing & Standardization

• Customizable: Can be designed with grooves, holes, threads, flats or stepped shafts.
• Processing: CNC turning, grinding, heat treatment, precision finishing.
• Quality control: Hardness testing, dimensional inspection, salt spray test, ultrasonic inspection if required.
• Certification: Can be produced according to marine standards and classification society requirements (CCS, LR, DNV, BV, ABS).

3. Selection & Installation Guidelines

• Material selection: 316/316L for general marine use; duplex stainless steel for severe corrosion environments.
• Fit clearance: Select clearance / transition fit based on working conditions (rotating, positioning, hinging).
• Locking mode: Use circlips, cotter pins, locking nuts or threaded ends to prevent falling off.
• Installation: Ensure coaxiality; avoid excessive knocking to prevent deformation or surface damage.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Siemens, bo-sch, Foxconn, Panasonic Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.