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 materials for three areas
| Area / Part | Recommended grade | Specification / Thickness | Surface | Main failure modes | Reference standards |
|---|---|---|---|---|---|
| Grinding body/Gripping edge/Buffer plate | 2205/S31635 duplex stainless steel/high alloy martensitic HRC≥52 | 6–30mm Plate | Surface finish/Glazing | Seawater salt spray+mineral abrasion+impact; low-temperature operation requires -40℃ impact toughness | GB/T 20878；ASTM A240；GB/T 3280 |
| Unloader hopper/chute/flow diverter plates | Martensitic wear-resistant stainless steel/duplex steel/wear-resistant composite plate | 8–40mm | Glazing/composite | Mineral/coking coal high-speed erosion+corrosion | GB/T 3280; JB/T Harbor Machinery Standards |
| Port conveyor idlers/frame/grooved walkway | 304/316L/2205 | 1.5–6mm | 2B/slip resistant | Ocean atmosphere+salt spray+wearing | GB/T 3280；ASTM A240 |
Table inside isConfiguration. Parts of the same material may change from 304 to 316L or 2205 depending on the medium, temperature, and welding method —— Explain usage conditions instead of specifying grades.
Material Considerations
- The most common grades in this industry are 2205 (2), 304 (1), and 316L (1) —— The parentheses indicate the number of affected areas, useful for quoting and material preparation.
- Consider hardness for wear parts (edges, liners, conveyors) (3/3 hits).
- Chlorides and salts are the most common corrosion sources (pitting, crevice corrosion) (2/3 hits).
- Thickness range 1.5–40 mm: Thin plates are often formed pieces (consider bending rebound and deep drawing cracking), thick plates are often welded structures (consider heat input and sensitization).
Common Issues
What stainless steel is most used for ports and harbors?
By total number, the top three are 2205 (2), 304 (1), and 316L (1). Specific parts still depend on media and temperature. For example, stainless countertops require switching from 304 to 316L if exposed to saltwater.
Which part is most prone to problems?
By failure description, it's typically "body/edge/filler" in seawater salt spray + mineral abrasion + impact; low-temperature conditions require -40℃ impact toughness. Recommended grade 2205/S31635 duplex steel/high alloy martensitic HRC≥52, with plates 6–30mm thick. For these conditions, specify media concentration, temperature, and cleaning methods 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 manufacturer for the same location, review your drawing or operating conditions.
Material and Specifications
Applications3
Thickness1.5–40mm