B18 · Port & Waterway
Stainless Steel Plates for Port and Harbor: 2205/304 Selection and 3 Item Lists
In port and harbor, we have organized three stainless steel parts: commonly used 2205 / 304 / 316L, with thickness ranging from 1.5–40 mm.
List of parts and selections by section
| Section / Part | Recommended grade | Specification / Thickness | Surface | Main Failure Modes | Reference Standards |
|---|---|---|---|---|---|
| Grapple Body/Gripper Blade/Buffer Plate | 2205/S31635 Dual-phase Steel/High-alloy Martensitic HRC≥52 | Plate 6-30mm | Facing/Welding | Seawater Salt Spray+Mineral Slurry Erosion+Impact; Low-temperature conditions require -40℃ impact toughness | GB/T 20878；ASTM A240；GB/T 3280 |
| Unloading Quay Cradle/Conveyor Guide/Discharge Plate | Molybdenum Martensitic Stainless Steel/Double Phase Steel/Multi-Phase Composite Plate | 8–40mm | Weld Overlay/Fusion Bonded Epoxy | High-Speed Abrasive Wear and Corrosion in Mining/Coking | GB/T 3280; JB/T Harbor Machinery Standards |
| Port Conveyor Roller/Railway Frame/Walkway Grids | 304/316L/2205 | 1.5–6mm | 2B/Slip-resistant | Ocean Atmosphere+Salt Spray+Abrasion | GB/T 3280；ASTM A240 |
Table InsideConfiguration. Parts of the same material can change from 304 to 316L or 2205 depending on the medium, temperature, and welding method —— Explain usage conditions instead of specifying grades.
Material Selection Tips
- The most common grades in this industry are 2205 (2), 304 (1), and 316L (1) —— The parentheses indicate how many items they apply to, as a starting point for quoting and material preparation.
- Consider hardness for wear parts (edges, liners, conveying pieces) (3/3 hits).
- Chlorides and salts are the most common sources of corrosion (pitting, crevice corrosion) (2/3 hits).
- Thickness range 1.5–40 mm: Thin plates are mostly formed pieces (consider bending rebound and deep drawing cracking), thick plates are mostly welded structural pieces (consider heat input and sensitization).
Common Issues
Which stainless steel is most used for ports and harbors?
Total statistics show 2205, 304, and 316L appear most frequently., Specific parts still need to be determined based on the medium and temperature, such as stainless steel countertops requiring a switch from 304 to 316L when in contact with saltwater.
Which part is most prone to problems?
Failure description, typically "grab bucket body/blade/shield": seawater salt spray + mineral erosion + impact; low-temperature operation requires -40℃ impact toughness; recommended grades 2205/S31635 duplex steel/HRC≥52, shield thickness 6–30mm. For this type of condition, specify medium concentration, temperature, and cleaning method during the design phase.
What thickness should I select?
Thickness range in the list is 1.5–40 mm. For thin sections, consider bending and surface finish; for thick sections, welding and structural strength. Values may vary by equipment manufacturer for the same location. Recheck with your drawing or operating conditions.
Related Materials and Adjacent Industries
Applications3
Thickness1.5–40mm