Description
Why 904L Stands Apart
Acid Resistance Redefined
Handles 50% sulfuric acid at 60°C (316L fails at 25% concentration).
Saltwater Immunity
Zero pitting after 1.000h in ASTM G48 Method A (10% FeCl₃).
Low-Carbon Hero
0.02% max carbon content prevents sensitization during welding.
Bio-Safe
Passes ASTM A270 for hygienic tubing in vaccine production.
Critical Applications
| Industry |
Use Cases |
Performance Milestone |
| Oil & Gas |
Subsea umbilicals, sour gas pipelines |
Survived 15+ years in North Sea platforms |
| Pharma |
Bioreactor jackets, CIP systems |
Complies with FDA 21 CFR §211.65 |
| Desalination |
Reverse osmosis pipework |
0 leaks in Saudi Arabia’s 500.000 m³/day plant |
| Chemical Processing |
Sulfuric acid concentrators |
Reduced downtime by 70% vs. Hastelloy C276 |
Certified Excellence
Material Certs: EN 1.4539. UNS N08904. ASME SB677.
Testing: Intergranular corrosion (ASTM A262 Practice E), PMI reports.
Sustainability: 45% recycled content | ISO 14064 carbon footprint tracking.
Client Testimonials
Houston Offshore Engineering: “904L pipes cut maintenance costs by 50% on our Gulf of Mexico rig.”
Barcelona Pharma Lab: “Zero contamination risks in high-purity fluid transfer.”
Chilean Mining Corp.: “Replaced titanium with 904L for acid leaching—ROI in 18 months.”
Technical Support & FAQs
Q: Can 904L replace nickel alloys like Inconel?
A: Yes for non-oxidizing acids (e.g., H₂SO₄, H₃PO₄), but consult us for nitric acid applications.
Q: Maximum operating temperature?
A: 400°C continuous (500°C intermittent) with proper insulation.
Q: Surface finish options?
A: Electropolished (Ra ≤0.3μm) for pharma | Pickled for industrial.
Q: Lead time for custom bends?
A: 2–3 weeks for radii ≥3x pipe diameter.
