Anti Acid 904L Stainless Steel Plate Hot Rolled for Pressure Vessel Applications

High-performance 904L stainless steel plates specifically designed for pressure vessel applications with superior acid resistance and corrosion protection.

Grade 904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel contains added copper to improve resistance to strong reducing acids such as sulphuric acid. The steel offers excellent resistance to stress corrosion cracking and crevice corrosion.

Grade 904L is non-magnetic and provides excellent formability, toughness, and weldability. While it contains high amounts of expensive ingredients like molybdenum and nickel, many applications now use cost-effective duplex stainless steel 2205 as an alternative.

904L stainless steels demonstrate excellent resistance to warm seawater and chloride attack. The high nickel content provides superior resistance to stress corrosion cracking, while copper addition develops resistance to sulphuric acid and other reducing agents in both aggressive and mild conditions.

The corrosion resistance of grade 904L falls between super austenitic grades (6% molybdenum) and standard 316L austenitic grades. For maximum stress corrosion cracking resistance in critical environments, this steel grade requires solution treatment following cold working.

• Non-magnetic properties
• Superior corrosion resistance compared to Type 316L and 317L
• Excellent resistance to sulphuric, phosphoric, and acetic acids
• High resistance to crevice and stress corrosion cracking
• Excellent formability and weldability

• Cooling equipment for seawater
• Chemical processing of sulphuric, phosphoric, and acetic acids
• Heat exchangers and condenser tubes
• Gas washing systems
• Control and instrumentation
• Oil and gas industry equipment
• Pharmaceutical production
• Wiring in electrostatic precipitators

Our company operates a large stainless steel processing center covering 6000 square meters. We provide comprehensive services including laser cutting, water cutting, hot rolling, punching, embossing, large shear bending, and dry casting straightening. Our production capabilities ensure high-quality, efficient stainless steel material processing and distribution services.

We specialize in the production and sales of superalloys, nickel base alloys, corrosion resistant alloys, precision alloys, cobalt-based alloys, and special alloy steels including special super austenitic stainless steel and duplex stainless steel. Our product range includes round steel, forgings, steel pipes, steel plates, precision steel belts, flanges, pipe fittings, and fasteners.

All materials are produced and tested in strict accordance with ASTM/ASME, GB, JIS, and other international standards. We maintain substantial inventory of nickel base alloys, high temperature alloys, and imported high temperature alloy steel plates in various specifications. We also supply imported welding wires and rods to support timely delivery for desulfurization and denitration engineering projects, petroleum, and petrochemical equipment.

Our manufacturing facilities include vacuum induction furnaces, semi-vacuum medium frequency induction furnaces, middle and high temperature heat treatment furnaces, electroslag remelting furnaces, free forging hammers (6 tons, 4 tons, 1 tons), hot rolling cold rolling steel pipe equipment, precision steel strip cold rolling machines, annealing furnaces, and round bar hot rolling cold drawing machines.

Quality assurance is supported by comprehensive testing facilities including direct reading spectrometers, spectrophotometers, chemical analysis laboratories, mechanical performance laboratories (with universal testing machines and hardness testing machines), metallographic laboratories, and ultrasonic nondestructive testing equipment. With over ten years of R&D and production experience, our products are recognized for high quality and reliability, earning praise from customers worldwide.