Stainless Steel Plate Surface Description

About Daxun Stainless Steel Plate

Daxun International embarked on its illustrious stainless steel journey in 2003. With over two decades of dynamic growth and groundbreaking innovation, it has risen to the pinnacle of the industry, firmly establishing its esteemed reputation in stainless steel materials and advanced processing.

With an illustrious history in international business, Daxun's 2023 export revenue surged past US$100 million. By strategically establishing three export service bases in China, the company has forged robust alliances with engineering firms, steel mills, and global trading entities. This extensive collaborative network continually enhances service capabilities and ambitiously expands Daxun's footprint in overseas markets.

Comprehensive Stainless Steel Plate Service

Daxun International redefines stainless steel services with its innovative 'supermarket' model, partnering globally with renowned steel mills. With an impressive inventory of 160,000 tons-comprising 20,000 tons of diverse metals, including ordinary stainless steel plates, duplex steel plates, nickel-based alloy plates, and heat-resistant steel plates-Daxun ensures reliability, unparalleled quality, and strict adherence to specifications and delivery standards.

Advanced Processing Capabilities

Equipped with cutting-edge steel processing equipment and professional testing centers, Daxun excels in cutting, grinding, forming, beveling, welding, heat treatment, machining, spraying, and beyond. Serving over 30 diverse industries-including automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/biofermentation, petrochemicals, and energy equipment-Daxun's expertise is unrivaled.

Diverse and Reliable Services

Daxun's extensive service experience is reflected in its wide range of offerings. With a client base exceeding 70,000 across 30 industries and 30,000+ active customers, Daxun's industry recognition and service excellence are well-established.

Efficient and High-Quality

Daxun guarantees prompt and efficient delivery of stainless steel products through an integrated system that merges information flow, logistics, and capital flow. Real-time order data seamlessly links to the logistics system, ensuring swift delivery. Strategically positioned processing centers near highways, rivers, and oceans facilitate efficient scheduling, rapid response, and smooth transportation.

Quality Commitment

Dedicated to quality and integrity, Daxun introduces 'Performance Excellence Management' and adopts 'PDCA+Lean' management principles, ensuring 'Daxun = assured quality' becomes synonymous with trust. The implementation of a sophisticated ERP system allows full traceability of each steel plate, reinforcing the industry's anti-counterfeiting efforts.

Save Costs for Customers

Daxun prioritizes time, material, and stress savings for customers, ultimately reducing costs. By offering cost-optimized material recommendations and streamlined processing services, Daxun enhances material utilization. Continuous lean improvement activities enable Daxun to minimize its own costs and pass on savings to customers. Additionally, a comprehensive product traceability system and prompt resolution of quality concerns provide customers with unparalleled peace of mind.

Leading Stainless Steel Sheet Suppliers in China

Grade 904L:

• Austenitic stainless steel sheet of grade 904L is a non-stabilized, high alloy, low carbon steel. The inclusion of copper significantly enhances its resistance to strong reducing acids, particularly sulfuric acid.
• This grade offers exceptional formability and weldability and remains non-magnetic under all conditions. Due to its austenitic structure, it possesses remarkable toughness, even at cryogenic temperatures, along with excellent resistance to chloride-induced stress corrosion cracking and pitting/crevice corrosion.
• Nickel and molybdenum, two of the most premium elements, are present in substantial quantities in 904L. This composition provides superior performance but comes at a higher cost. Nowadays, Duplex stainless steel 2205 (S31803 or S32205) is often chosen for many applications where 904L was traditionally favored, offering similar performance at a more economical price. As a result, the use of 904L has become less prevalent.

Corrosion Resistance:

• 904L Stainless Steel offers exceptional resilience across various conditions, far extending beyond its initial design for sulfuric acid resistance. Its performance in warm seawater and other high-chloride environments is outstanding, as evidenced by a PRE (Pitting Resistance Equivalent) of 35. The high nickel content significantly enhances its resistance to stress corrosion cracking compared to typical austenitic grades. Copper elements in 904L provide additional resistance against sulfuric and other reducing acids, especially in the highly aggressive 'mid concentration' range.
• 904L's corrosion performance sits between the ordinary austenitic grade 316L and the highly alloyed 'super austenitic' grades that contain 6% molybdenum or more. This balance offers versatile use across various demanding applications.
• When compared to molybdenum-free grades like 304L and 310L, 904L demonstrates superior resistance to corrosive environments.
• For optimal resistance against stress corrosion cracking in challenging scenarios, it is recommended that 904L be solution treated after any cold work.

Heat Resistance:

• 904L boasts strong oxidation resistance. However, similar to other highly alloyed grades, it suffers from structural instability at elevated temperatures due to the precipitation of brittle phases like sigma. It is not advisable to use 904L beyond 550°C. According to the ASME Boiler and Pressure Vessel Code, the design stress values for 904L are set at 371°C.

Heat Treatment:

• Solution Treatment (Annealing): Heat to 1090-1175°C and cool rapidly. Note that this grade cannot be hardened by thermal treatment, maintaining its properties through solution treatment alone.

Welding:

• 904L can be effectively welded using all standard techniques. However, its fully austenitic solidification makes it prone to heat cracking, particularly in constrained weldments. Therefore, caution is advised. Pre-heating is generally not recommended, and post-weld heat treatment is typically unnecessary. Grade 904L rods and electrodes are prequalified by AS 1554.6 for welding.

Fabrication:

• Due to its high purity and low sulfur content, machining 904L can be more challenging compared to grades designed specifically for machinability. Nevertheless, conventional methods can be used. Achieving a small radius of bend is straightforward and usually done cold. While subsequent annealing is often not required, it should be considered if the fabrication will be used in environments prone to severe stress corrosion cracking.

Typical Applications:

• 904L is ideal for use in environments where there is exposure to aggressive chemicals and harsh conditions. Typical applications include processing plants for sulfuric, phosphoric, and acetic acids, pulp and paper processing, components in gas scrubbing plants, seawater cooling equipment, oil refinery components, and wires in electrostatic precipitators.

Specified Properties:

• According to ASTM A240M, the properties specified are for flat rolled products such as plates, sheets, and coils. While other products like pipes, tubes, and bars have similar characteristics, they are detailed in their respective specifications.

904L Stainless Steel Sheets in a Variety of Finishes

Our stainless steel sheets are available in an array of stunning finishes, including brushed finish, 2B smooth finish, and 8K mirror finish, to suit various aesthetic and functional needs.

Each stainless steel sheet we provide comes with a protective film on the finished side. This film is easily removable after fabrication or installation, ensuring the surface remains pristine and free from marks or wear. The reverse side remains unfinished.

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