SS 904L Foil For Sulfuric Acid

Are you frustrated by the frequent need to replace precision components operating in sulfuric acid environments? When handling high-concentration or moderately heated sulfuric acid, traditional 316L stainless steel foil often succumbs to perforation or pitting corrosion within a short period. If you are seeking a precision material that offers an ultra-thin profile while providing 100% resistance to sulfuric acid corrosion, SS 904L stainless steel foil is the ideal choice for your project.

As a leading global supplier of specialty steels, GNEE offers precision SS 904L (UNS N08904) stainless steel foil with thicknesses as low as 0.02mm. Our materials are specifically engineered for chemical processing, environmental desulfurization systems, and precision instrumentation, ensuring that your equipment operates robustly and reliably even in the most demanding acidic environments.

Our high-precision SS 904L (UNS N08904) stainless steel foil features a strictly controlled copper (Cu) content of 1.2%–1.5% and boasts a Pitting Resistance Equivalent Number (PREN) of over 35. This ensures a service life in reducing acidic media that is 3 to 5 times longer than that of 316L stainless steel. Through a precision cold-rolling process, we maintain strict thickness tolerances within a range of ±0.002mm to ±0.005mm, guaranteeing edges that are 100% free of burrs and creases. Each shipment is accompanied by comprehensive reports on chemical composition and intergranular corrosion testing,compliant with ASTM B625 and EN 10204 3.1 standards,providing the ultimate assurance of reliability for your precision diaphragms or chemical seals.

 

SS 904L Stainless Steel Foil Specifications

Key Parameters	Detailed Specifications
Executive Standards	ASTM B625, ASME SB625, EN 10088-2, JIS G4305
Thickness Range	0.02mm - 0.5mm (Ultra-thin precision customization available)
Width Range	5.0mm - 600mm (Support for precision slitting/narrow strips)
Surface Finish	BA (Bright Annealed), 2B (Matte), Polished, Mirror Finish
Hardness Levels	Annealed (Soft), 1/4 Hard, 1/2 Hard, Full Hard
Edge Condition	Round Edge, Slit Edge (Burr-free precision cutting)
Typical Applications	Sensor Diaphragms, Heat Exchanger Fins, Anti-corrosion Gaskets, Bipolar Plates for Fuel Cells, Chemical Valve Seals

 

SS 904L Foil Weight Reference Chart

Note: The density of 904L stainless steel is approximately 8.0 g/cm³. Below are the theoretical weights for common precision foil specifications:

Thickness (mm)	Width (mm)	Length (m)	Theoretical Weight ( kg/coil )
0.03	100	500	12.0
0.05	200	200	16.0
0.08	300	100	19.2
0.10	400	50	16.0
0.20	600	50	48.0

 

Weight Calculation Formula:Thickness (mm) × Width (mm) × Length (m) × 0.008 = Weight (kg)

 

SUS 904L Foil Supplier

100% PMI Testing: Ensures that the chemical composition-particularly the Cu, Ni, and Mo content-of every shipped coil of 904L foil meets all specified standards.
Surface Protection: Features single-sided or double-sided protective film (blue or clear) to prevent surface scratches during stamping and slitting processes.
Secure Packaging: Utilizes suspended wooden crates or vacuum packaging to ensure the foil remains free from curling, deformation, oxidation, and corrosion during long-distance transit.

 

FAQ

Q1: Can 904L stainless steel withstand sulfuric acid?

904L was originally developed to withstand environments containing dilute sulfuric acid, and is one of the few stainless steels that, at temperatures up to 95°F (35°C), provides full resistance in such environments within the entire concentration range of 0 to 100%.

 

Q2: What is the maximum temperature that 904L foil can withstand in sulfuric acid?

A: In concentrated sulfuric acid above 90%, 904L performs excellently at room temperature. In medium concentrations (20%-60%) of sulfuric acid, the safe operating temperature of 904L is 60°C-70°C. For higher temperatures, it is recommended to consult our technical experts for material selection.

 

Q3: Can 904L foil be welded?

A: Yes. However, due to the extremely thin foil, laser welding or precision plasma welding is usually used. It is recommended to use ER385 welding consumables of the same material and control heat input to prevent intergranular corrosion.