904L Stainless Steel Coil Product Overview

904L Stainless Steel Coil is a super austenitic stainless steel with a high alloy composition, including elevated levels of nickel, chromium, molybdenum, and copper. It is specifically designed for extreme corrosive environments, offering outstanding resistance to strong acids, pitting, and crevice corrosion.

Due to its superior corrosion resistance and chemical stability, 904L is widely used in industries such as chemical processing, pharmaceuticals, and environmental engineering.

Key Features of 904L Stainless Steel Coil

1. Super Austenitic Structure

904L belongs to the super austenitic stainless steel family, providing exceptional corrosion resistance and structural stability in aggressive environments.

2. Excellent Resistance to Strong Acids

Performs exceptionally well in sulfuric acid, phosphoric acid, and other strong corrosive media, making it ideal for chemical processing applications.

3. Outstanding Crevice & Pitting Corrosion Resistance

Enhanced molybdenum and copper content significantly improve resistance to localized corrosion, including pitting and crevice corrosion.

4. High Alloy Composition

The high nickel and chromium levels ensure excellent overall corrosion resistance and long-term durability.

5. Good Weldability & Fabrication

Despite its high alloy content, 904L offers good weldability and can be processed using standard fabrication techniques.

Technical Advantages

• Superior performance in highly corrosive environments
• Excellent resistance to acid attack and chloride-induced corrosion
• Long service life with reduced maintenance
• Stable mechanical properties under harsh conditions
• Ideal for critical and high-value industrial applications

Typical Applications

1. Chemical Processing Equipment

Widely used in reactors, pipelines, and tanks handling aggressive chemicals and acids.

2. Acid Storage Tanks

Ideal for storage and transportation of strong acids such as sulfuric and phosphoric acid.

3. Pharmaceutical Equipment

Suitable for high-purity and corrosion-resistant environments required in pharmaceutical production.

4. Flue Gas Desulfurization Systems

Used in flue gas treatment and environmental protection systems due to its resistance to acidic gases and condensates.

5. Petrochemical & Environmental Industries

Applied in systems requiring high corrosion resistance and long-term reliability.

Processing & Fabrication

• Excellent weldability with standard techniques
• Suitable for cold forming and fabrication
• Maintains corrosion resistance after welding
• Can be processed into coils, sheets, and custom components

Surface Finish Options

• 2B Finish
• BA (Bright Annealed)
• No.4 (Brushed Finish)
• Pickled / Industrial Finish