Molybdenum Alloy Stainless Steel Pipe Chloride Resistance For Marine Chemical Applications
The Molybdenum Alloy Stainless Steel Pipe contains molybdenum as a key alloying element, which significantly enhances corrosion resistance, particularly against pitting and crevice corrosion in chloride-rich environments. This pipe offers superior performance in aggressive media such as seawater, acidic solutions, and high-temperature industrial fluids. With excellent mechanical strength and weldability, it is the preferred choice for demanding applications where standard stainless steel grades may fail.
| Parameter | Details |
|---|---|
| Standards | ASTM A312, A269, A213; EN 10216-5; ASME SA312 |
| Available Grades | 316, 316L, 317, 317L, 904L, Duplex 2205, Alloy 825 |
| Outer Diameter | 6 mm – 630 mm |
| Wall Thickness | 0.5 mm – 30 mm |
| Length | Fixed lengths 3m / 6m, or custom lengths upon request |
| Manufacturing Process | Seamless – Cold drawn / Hot rolled |
| Surface Finish | Annealed, pickled, polished, bright annealed |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 317L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 |
| 904L | 0.02 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 |
Molybdenum content is the key differentiator, providing enhanced chloride resistance.
| Grade | Condition | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|---|
| 316 / 316L | Annealed | 515 / 485 | 205 / 170 | 40 / 40 | 217 / 217 |
| 317L | Annealed | 515 | 205 | 40 | 217 |
| 904L | Annealed | 490 | 215 | 35 | 220 |
Tested in accordance with ASTM E8 / E8M.
- Superior Pitting Resistance Equivalent Number (PREN) – Higher molybdenum content increases resistance to localized corrosion
- Excellent Performance in Chloride Environments – Ideal for seawater, brine, and de-icing salt applications
- Enhanced Crevice Corrosion Resistance – Critical for flange gaskets, threaded connections, and lap joints
- Good High-Temperature Strength – Retains mechanical properties at elevated temperatures
- Improved Weldability – Low carbon versions (L grades) prevent intergranular corrosion after welding
- Marine and Offshore – Seawater cooling lines, shipbuilding, offshore platforms
- Chemical Processing – Heat exchangers, pressure vessels, reactor lines
- Oil and Gas – Sour gas service, downhole tubing, flow lines
- Desalination Plants – High-pressure brine piping
- Pulp and Paper – Bleaching plant equipment
- Pharmaceutical and Food – Sanitary process lines requiring high purity
- Pollution Control – Flue gas desulfurization (FGD) systems
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
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