904L Stainless Steel Coil Super Austenitic 2B Finish ASTM A240 0.5mm 3.0mm Thickness 1219mm 1500mm Width Acid Resistant

ASTM A240 904L Stainless Steel Coil - Super Austenitic Grade

Grade 904L is a premium super austenitic stainless steel engineered for maximum corrosion resistance in aggressive chemical environments. With high alloy content including nickel, chromium, molybdenum, and copper, it outperforms standard 316L in reducing acid environments and provides outstanding resistance to stress corrosion cracking.

Key Features

• Superior Acid Resistance: Copper alloying provides exceptional resistance to reducing acids including sulfuric, phosphoric, and acetic acids at moderate temperatures and concentrations
• Stress Corrosion Cracking Resistance: High nickel content provides excellent resistance to chloride stress corrosion cracking, a critical advantage over standard austenitic grades
• Pitting and Crevice Resistance: High molybdenum content (4-5%) provides a PREN value above 34, indicating excellent resistance to localized corrosion
• Excellent Weldability: Fully austenitic structure with controlled carbon content allows welding without post-weld heat treatment in most applications
• Good Formability: Suitable for cold forming processes including bending, drawing, and stamping
• Non-Magnetic: Remains non-magnetic in all conditions, essential for specific instrumentation applications

Typical Applications

• Sulfuric and phosphoric acid processing equipment
• Pollution control scrubbers and flue gas desulfurization systems
• Oil and gas offshore platform seawater handling
• Chemical and petrochemical reactor vessels
• Pulp and paper industry bleaching equipment
• Pharmaceutical API manufacturing vessels

Quality Assurance

Every coil undergoes comprehensive testing including positive material identification (PMI), optical emission spectrometry for full chemical analysis, ASTM G48 pitting corrosion testing, intergranular corrosion testing per ASTM A262 Practice C, and full mechanical property testing. Complete 3.1 certification to EN 10204 provided.