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904L Stainless Steel Round Pipe Ideal for Chemical and Petrochemical Applications
| Place of Origin | China |
|---|---|
| Brand Name | DELTA |
| Certification | ISO |
| Model Number | 904L |
| Minimum Order Quantity | 500 kgs |
| Price | 8-12 USD/Kg |
| Packaging Details | standard packing for export |
| Delivery Time | 5 - 12 days based on the quantity |
| Payment Terms | L/C, T/T, Western Union |
| Supply Ability | 3 Ton per week |
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xProduct Details
| Products | Stainless Steel Seamless Pipe | Grade | 904L |
|---|---|---|---|
| Diameter | DN10 - DN400 | Length | 6m Or Custom Cutting Any Length As Request |
| Standard | ASTM EN | Service | Cutting |
| Loading Port | Shanghai Port | Thickness | 4.0 - 50.0mm |
| Highlight | 904L Stainless Steel Round Pipe,Chemical Stainless Steel 904L Pipe,Petrochemical Stainless Steel Round Pipe |
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Product Description
904L Stainless Steel Round Pipe Ideal for Chemical and Petrochemical Applications
Products Specification
| Products Name | 904L Stainless Steel Seamless Pipe |
Grade: |
304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 S32760 904L 254SMO and equal grade in GB JIS EN DIN Standard |
| Standards: | ASTM A213M-94b ASTM A249M-94a ASTM A269-94a ASTM A312M-94b,ect. |
| DIN 17456-85 DIN 17458-85 DIN 17459-92.ect | |
| JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect. | |
| GB13296-1991 GB14975-2002 GB14976-2002,ect. | |
| Size: | ND5 - DN400 |
| Length: | 6m length or cutting any length as request |
| Applications: | fluid and gas transport, structure , boiler, heat exchanger, super heater |
904L Stainless Steel Pipes: High-Performance Corrosion-Resistant Tubing
904L (UNS N08904) stainless steel pipes are premium austenitic alloy tubes designed for extreme corrosive environments where standard stainless steels (e.g., 316L) fail. Their exceptional resistance to acids, chlorides, and pitting/crevice corrosion makes them critical in chemical, offshore, and marine industries.
1. Key Parameters & Specifications
Typical Chemical Composition (wt%)
| Element | Min | Max | Role |
|---|---|---|---|
| Cr | 19.0 | 23.0 | Base corrosion resistance |
| Ni | 23.0 | 28.0 | Austenite stability |
| Mo | 4.0 | 5.0 | Pitting/chloride resistance |
| Cu | 1.0 | 2.0 | Sulfuric acid resistance |
| C | – | 0.02 | Weldability |
| Mn | – | 2.0 | Austenite stabilizer |
| Fe | Balance | – | Base metal |
Mechanical Properties (Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength | ≥490 MPa (71 ksi) |
| Yield Strength (0.2% offset) | ≥220 MPa (32 ksi) |
| Elongation | ≥35% |
| Hardness (Rockwell B) | ≤90 HRB |
Common Dimensions & Tolerances
| Parameter | Range | Standard |
|---|---|---|
| Outer Diameter (OD) | 6 mm – 600 mm (¼" – 24") | ASME B36.19 |
| Wall Thickness | 0.5 mm – 50 mm (Schedule 5S to XXS) | ASTM A312 |
| Length | 1–12 m (fixed/random) | EN 10217-7 |
2. Manufacturing & Quality Standards
| Standard Type | Key Standards | Scope |
|---|---|---|
| Material | ASTM A312, ASTM A790, EN 10217-7 | Chemical, mechanical, testing requirements |
| Dimensions | ASME B36.19, ISO 1127 | OD/wall thickness tolerances |
| Testing | ASTM A923, ASTM E1128 | Intergranular corrosion, hydrostatic, NDT |
| Certification | PED 2014/68/EU, NACE MR0175 | Pressure equipment, sour service |
3. Key Features & Advantages
Performance Characteristics
| Feature | Benefit |
|---|---|
| Extreme Corrosion Resistance | Resists sulfuric, phosphoric, acetic acids; seawater, chlorides |
| Pitting Resistance (PREₙ≥36) | Superior to 316L (PREₙ=25) in aggressive media |
| Low Carbon Content | Minimizes carbide precipitation in welds (no sensitization) |
| High Molybdenum + Copper | Critical for acid handling and chloride environments |
| Excellent Weldability | Welded with ER385/ERNiCrMo-2 filler; retains corrosion resistance |
| Biocompatibility | Suitable for pharmaceutical/food processing |
Comparison vs. 316L Pipes
| Property | 904L Pipe | 316L Pipe |
|---|---|---|
| Corrosion Resistance | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Cost | 3–5× higher | Lower |
| Sulfuric Acid Handling | Up to 95% concentration | <10% concentration |
| Chloride Limit | >10,000 ppm | ~1,000 ppm |
| Typical PREₙ | 36–40 | 24–26 |
4. Common Applications
| Industry | Use Cases |
|---|---|
| Chemical Processing | Acid transport pipes (H₂SO₄, HCl), reactor coils |
| Oil & Gas | Offshore seawater piping, sour gas (H₂S) flowlines |
| Marine Engineering | Heat exchanger tubes, desalination systems |
| Pharmaceutical | Ultra-pure fluid transfer, CIP/SIP systems |
| Pollution Control | FGD scrubber pipes, chimney liners |
| Pulp & Paper | Bleach chemical transport, digesters |
5. Considerations for Use
-
Cost: Significantly more expensive than standard stainless pipes (high Ni/Mo content).
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Fabrication: Requires low heat input during welding; avoid carbon steel contamination.
-
Machining: Use carbide tools (high work-hardening rate).
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Suppliers: Specialized mills (e.g., Sandvik, Outokumpu, Nippon Steel).
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