Seamless 904L Stainless Steel Pipe Suppliers
- Size Range: From 4mm4mm to 800mm800mm
- Wall Thickness Range: From 1mm to 150mm (SCH10-XXS)
- Length Options: 4000mm, 5800mm, 6000mm, 12000mm, or as required.
- Finish: 2B, BA,4K,8K, NO.1,2D,3#, HL
- Type: Round, square, rectangular, hexagonal, flat, angle
- Technique: Cold rolled, hot rolled
Product Description Of Seamless 904L Stainless Steel Pipe
Seamless 904L Stainless Steel Pipe, also known as ASTM B677 UNS N08904 Pipe, stands as a low-carbon, high-alloy austenitic stainless steel. This steel grade thrives in harsh corrosion conditions, originally designed for its corrosion resistance in dilute sulfuric acid.
With a fully austenitic structure, 904L exhibits lower sensitivity to precipitate ferrite and sigma phases compared to traditional molybdenum-rich austenitic grades. Its relatively high content of chromium, nickel, molybdenum, and copper translates into excellent corrosion resistance, particularly under sulfuric and phosphoric conditions.
Seamless 904L Stainless Steel Pipe offers exceptional formability, weldability, and toughness. It excels in resisting pitting and crevice corrosion, showcasing superb resistance to stress corrosion cracking and intergranular corrosion. The maximum operating temperature for this pipe reaches 450 degrees Celsius (824 degrees Fahrenheit).
Applications include sulfuric acid production and transport, metal pickling in sulfuric acid, phosphoric acid production and concentration, seawater handling, brackish water, condensers, heat exchangers, and general piping projects. It’s also utilized in pulp and paper industries, gas scrubbing, and chemical and pharmaceutical sectors.
Keep in mind that while 904L shares welding and forming characteristics with 316L, it cannot be hardened by heat treatment.
specification Of Seamless 904L Stainless Steel Pipe
Chemical Components Of Seamless 904L Stainless Steel Pipe
physical property Of Seamless 904L Stainless Steel Pipe
|Melting Range, °C (°F)||1398 – 1446 (2550 – 2635)|
|Specific Heat Capacity, J/kg·K (Btu/lb ·°F)||450 (0.12) at 20 °C|
|Electrical Resistivity, μΩ·m||72 at 20 °C|
|Modulus of Elasticity, GPa (10⁶ psi)||190 – 210 (27557 – 30458 ksi)|
|Thermal Conductivity, W/m·K (Btu/ft · h ·°F)||11.5 (9.3) at 100 °C (212 °F)|
|Coefficient of Thermal Expansion, 10⁻⁶/K (μin./in. ·°F)||15.8 mm/m/°C|
mechanical property Of Seamless 904L Stainless Steel Pipe
|Tensile Strength, MPa (ksi), ≥||490 (71)|
|0.2% Yield Strength, MPa (ksi), ≥||220 (31)|
|Elongation in 50 mm (2 in.), %, ≥||35|
|Rockwell Hardness (HRBW), ≤||70-90|
characteristics Of Seamless 904L Stainless Steel Pipe
The key characteristic of Seamless 904L Stainless Steel Pipe is its “Low Carbon, High-Alloy Composition.” This feature is fundamental to its exceptional performance in various challenging environments. Here’s a detailed explanation:
Low Carbon Content: 904L Stainless Steel contains a low carbon content, which is typically less than 0.02%. This low carbon content enhances the material’s resistance to sensitization and intergranular corrosion. It mitigates the formation of chromium carbide precipitates at grain boundaries, which are a common source of corrosion susceptibility in stainless steels.
High-Alloy Composition: In addition to low carbon, 904L is characterized by its high-alloy composition. It includes significant amounts of chromium, nickel, molybdenum, and copper. These alloying elements contribute to the following:
Chromium: Provides corrosion resistance by forming a passive oxide layer on the surface, protecting the steel from environmental attacks.
Nickel: Enhances the alloy’s resistance to corrosion and provides stability, especially in acidic environments.
Molybdenum: Increases the material’s resistance to pitting and crevice corrosion, particularly in chloride-containing solutions.
Copper: Enhances the material’s resistance to sulfuric acid and other aggressive acids.
The combination of low carbon and high-alloy composition makes Seamless 904L Stainless Steel Pipe exceptionally corrosion-resistant, even in highly corrosive and challenging conditions, such as sulfuric and phosphoric acid environments. It exhibits resistance to both general corrosion and localized corrosion phenomena like pitting and crevice corrosion. This feature makes it a top choice for industries like chemicals, pharmaceuticals, pulp and paper, and applications involving exposure to corrosive acids.
Moreover, its low carbon content minimizes sensitization and intergranular corrosion, ensuring its suitability for welding and forming operations. The low carbon content also contributes to its good weldability.
In summary, the “Low Carbon, High-Alloy Composition” of Seamless 904L Stainless Steel Pipe is the cornerstone of its outstanding corrosion resistance and adaptability to demanding industrial environments, making it a reliable choice for critical applications.
The “Excellent Corrosion Resistance” of Seamless 904L Stainless Steel Pipe is a standout feature that sets it apart from other materials. Here’s a detailed explanation of this characteristic:
Resistance to General Corrosion: Seamless 904L Stainless Steel Pipe exhibits exceptional resistance to general corrosion. This means it can withstand the corrosive effects of various chemicals, acids, and aggressive environments. It is particularly well-suited for applications involving sulfuric and phosphoric acid, which are highly corrosive substances. The alloy’s unique composition, including high levels of chromium, nickel, and molybdenum, forms a protective oxide layer on the surface. This passive film acts as a shield, preventing further corrosion and maintaining the integrity of the material.
Durability in Challenging Conditions: This pipe’s corrosion resistance extends to harsh conditions where other materials might fail. It excels in environments with elevated temperatures, aggressive chemicals, and exposure to saltwater, making it suitable for various industries such as chemicals, petrochemicals, pharmaceuticals, and offshore applications.
Pitting and Crevice Corrosion Resistance: Seamless 904L Stainless Steel Pipe also demonstrates good resistance to localized corrosion, such as pitting and crevice corrosion. The high molybdenum content in the alloy provides protection against these forms of corrosion, which can be particularly destructive in certain environments.
Reduced Sensitization: The low carbon content in 904L stainless steel minimizes sensitization and intergranular corrosion. Sensitization occurs when chromium carbides form at grain boundaries during welding or heat treatment, reducing the material’s corrosion resistance. The low carbon content ensures that 904L remains resistant to this phenomenon, making it suitable for welding and forming processes.
In summary, the “Excellent Corrosion Resistance” of Seamless 904L Stainless Steel Pipe is a testament to its ability to endure and thrive in highly corrosive and challenging conditions. Its unique alloy composition and passive film formation make it a top choice for critical applications where corrosion resistance is paramount.
The “Good Pitting and Crevice Corrosion Resistance” of Seamless 904L Stainless Steel Pipe is a vital characteristic that ensures its durability in challenging environments. Here’s an in-depth explanation:
Protection Against Localized Corrosion: Pitting and crevice corrosion are highly localized forms of corrosion that can lead to severe damage in many materials. Seamless 904L Stainless Steel Pipe exhibits good resistance to these types of corrosion.
High Molybdenum Content: The alloy’s resistance to pitting and crevice corrosion is attributed, in part, to its high molybdenum content. Molybdenum enhances the material’s ability to withstand attacks from chloride ions, which are often responsible for initiating pitting and crevice corrosion in stainless steels.
Passive Film Formation: Like other stainless steels, 904L forms a passive protective film on its surface when exposed to oxygen. This passive film acts as a barrier that prevents aggressive substances from penetrating the material and causing localized corrosion. The combination of the passive film and the alloy’s chemical composition helps maintain its resistance.
Applications in Aggressive Environments: Seamless 904L Stainless Steel Pipe is commonly used in industries and applications where exposure to chloride-rich environments, such as seawater, brine solutions, and chemical processing, is prevalent. Its ability to resist pitting and crevice corrosion makes it suitable for offshore platforms, desalination plants, and various chemical and petrochemical processes.
Long-Term Performance: The resistance to localized corrosion ensures the long-term integrity of the pipe, reducing the risk of unexpected failures due to corrosion-induced damage. This reliability is crucial in critical applications where safety and operational continuity are paramount.
In summary, the “Good Pitting and Crevice Corrosion Resistance” of Seamless 904L Stainless Steel Pipe is a fundamental property that ensures its longevity and effectiveness in environments where many other materials might fail due to localized corrosion. This characteristic makes it a preferred choice for applications in harsh conditions where corrosion protection is essential.
The “Superb Formability, Weldability, and Toughness” of Seamless 904L Stainless Steel Pipe is a critical feature that enhances its versatility and usability. Here’s a detailed explanation of this characteristic:
Formability: Seamless 904L Stainless Steel Pipe exhibits excellent formability, which means it can be easily shaped and fabricated into various configurations. This property is particularly important in industries such as manufacturing, construction, and engineering, where pipes need to conform to specific shapes and dimensions. Whether it’s bending, rolling, or machining, this stainless steel pipe maintains its structural integrity during forming processes.
Weldability: Weldability refers to the ease and quality of welding this stainless steel. 904L Stainless Steel Pipe has good weldability, making it suitable for various welding techniques, including TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and SMAW (Shielded Metal Arc Welding). It forms strong, durable welds without significant loss of corrosion resistance, ensuring the integrity of welded joints.
Toughness: Toughness is the ability of a material to absorb energy and deform plastically before fracturing. Seamless 904L Stainless Steel Pipe offers remarkable toughness, allowing it to withstand mechanical stresses and impacts without breaking or undergoing brittle failure. This toughness is essential in applications where the pipe may experience dynamic loads, vibrations, or thermal cycling.
Durability: The combination of excellent formability, weldability, and toughness contributes to the overall durability of the pipe. It can endure harsh operating conditions, including extreme temperatures, corrosive environments, and mechanical stress, without compromising its structural integrity.
Versatility: Due to its exceptional formability, weldability, and toughness, Seamless 904L Stainless Steel Pipe finds applications in a wide range of industries. These include chemical processing, petrochemicals, pharmaceuticals, power generation, marine environments, and more. Its versatility makes it a reliable choice for complex engineering projects.
In summary, the “Superb Formability, Weldability, and Toughness” of Seamless 904L Stainless Steel Pipe make it an ideal material for applications that demand precision shaping, secure welding, and resistance to mechanical stress. This combination of properties ensures the pipe’s reliability and longevity in various industries and challenging environments.
The “High Strength and Hardness” of Seamless 904L Stainless Steel Pipe is a vital characteristic that contributes to its suitability for demanding applications. Here’s an in-depth explanation of this feature:
High Strength: Seamless 904L Stainless Steel Pipe possesses impressive strength properties, which means it can withstand significant mechanical loads and stresses. Its high tensile strength ensures that the pipe retains its structural integrity even in harsh conditions, such as high-pressure environments or when supporting heavy equipment. This attribute makes it ideal for critical applications in industries like oil and gas, chemical processing, and power generation.
Hardness: Hardness measures the resistance of a material to deformation, indentation, or wear. Seamless 904L Stainless Steel Pipe exhibits high hardness, which is essential for applications where abrasion resistance and durability are paramount. Its hardness helps prevent surface damage, ensuring the pipe maintains its performance over extended periods.
Resistance to Deformation: The combination of high strength and hardness in this stainless steel pipe prevents deformation under heavy loads or extreme temperatures. This resistance to deformation is crucial in environments where maintaining dimensional stability is vital, such as in precision machinery or structural components.
Wear Resistance: The hardness of Seamless 904L Stainless Steel Pipe enhances its wear resistance, reducing the risk of surface damage or erosion in abrasive environments. This property is advantageous in applications like mining equipment, where the pipe may come into contact with abrasive materials.
Longevity: The high strength and hardness contribute to the longevity of the pipe. It can endure demanding conditions without experiencing material fatigue, ensuring a longer service life. This longevity reduces maintenance requirements and replacement costs.
Reliability: Industries that rely on the use of Seamless 904L Stainless Steel Pipe benefit from its reliability under challenging conditions. Whether exposed to extreme temperatures, corrosive chemicals, or mechanical stress, the pipe’s high strength and hardness make it a dependable choice.
In summary, the “High Strength and Hardness” of Seamless 904L Stainless Steel Pipe make it a preferred material for applications that demand robustness, resistance to deformation, and durability. Its exceptional mechanical properties ensure reliable performance in various industries, including chemical processing, oil and gas, and heavy machinery.
Seamless 904L Stainless Steel Pipe exhibits exceptional resistance to stress corrosion cracking (SCC) and intergranular corrosion (IGC). Here’s a detailed explanation of these characteristics:
Resistance to Stress Corrosion Cracking (SCC): Stress corrosion cracking is a severe form of corrosion that occurs under the combined influence of tensile stress and a specific corrosive environment. Seamless 904L Stainless Steel Pipe’s resistance to SCC makes it an excellent choice for critical applications in industries where the material is exposed to aggressive chemicals and tensile stress. The following factors contribute to its resistance:
High Alloy Composition: The high alloy composition of 904L stainless steel, including nickel, chromium, molybdenum, and copper, enhances its resistance to SCC. These alloying elements create a protective passive film on the surface, preventing the initiation and propagation of stress corrosion cracks.
Low Carbon Content: The low carbon content of 904L stainless steel reduces susceptibility to sensitization, a condition where chromium carbides form along the grain boundaries. Sensitization can make stainless steel prone to SCC, but the low carbon content in 904L minimizes this risk.
Precipitation-Hardening Copper: The presence of copper in 904L stainless steel contributes to its resistance to SCC. Copper helps in reducing the susceptibility of the material to stress corrosion cracking.
Resistance to Intergranular Corrosion (IGC): Intergranular corrosion is another form of corrosion that affects the grain boundaries of stainless steel, causing them to corrode preferentially. This can lead to material degradation and failure in certain environments. Seamless 904L Stainless Steel Pipe offers excellent resistance to IGC due to the following factors:
High Chromium Content: The high chromium content in 904L stainless steel forms a protective oxide layer on the grain boundaries, preventing intergranular corrosion. This layer acts as a barrier that shields the material from corrosive attack along the grain boundaries.
Molybdenum Addition: The inclusion of molybdenum further enhances resistance to intergranular corrosion. Molybdenum promotes the formation of a stable and protective passive film on the grain boundaries.
Low Carbon Content: The low carbon content reduces the precipitation of chromium carbides at the grain boundaries, which is a common cause of intergranular corrosion in stainless steels.
In summary, the resistance of Seamless 904L Stainless Steel Pipe to stress corrosion cracking and intergranular corrosion is a critical feature that ensures the material’s integrity and reliability, particularly in aggressive chemical environments and high-stress conditions. This makes it a preferred choice for various industries, including chemical processing, petrochemical, and offshore applications, where corrosion resistance is paramount.
application Of Seamless 904L Stainless Steel Pipe
Seamless 904L Stainless Steel Pipe is extensively used in heat exchangers, playing a critical role in various industries. Its exceptional corrosion resistance allows it to effectively transfer heat between fluids without succumbing to degradation. In applications like chemical processing, pharmaceutical manufacturing, and power generation, 904L pipes help maintain temperature control and enhance efficiency. This stainless steel pipe's ability to withstand aggressive environments, such as those involving corrosive chemicals or high temperatures, ensures the longevity and reliable performance of heat exchangers in these demanding settings.
Seawater Heat Exchangers
Seamless 904L Stainless Steel Pipe finds prominent applications in seawater heat exchangers. Its remarkable corrosion resistance properties make it an ideal choice for these systems, which are exposed to the harsh and corrosive environment of seawater. In seawater heat exchangers, 904L pipes efficiently transfer heat between seawater and other fluids, maintaining optimal temperatures in various marine applications. This stainless steel pipe's ability to withstand the corrosive effects of seawater ensures the longevity and reliability of heat exchange processes in marine and offshore industries, where durability and performance are paramount.
Furnace Components, Superheaters, and Afterburner Parts
Seamless 904L Stainless Steel Pipe is extensively utilized in furnace components, superheaters, and afterburner parts. These critical applications demand materials with exceptional high-temperature resistance and corrosion resistance, making 904L stainless steel an ideal choice. In furnace components, it withstands extreme heat and corrosive environments. Superheaters rely on its durability to elevate temperatures efficiently in power generation. Afterburner parts benefit from its robustness and high-temperature resistance to enhance combustion processes. Overall, the Seamless 904L Stainless Steel Pipe ensures the reliability and longevity of these components in demanding industrial settings.
Chemical and Petrochemical Piping Systems
Seamless 904L Stainless Steel Pipe finds extensive use in chemical and petrochemical piping systems. Its exceptional corrosion resistance and high-temperature tolerance make it a reliable choice for conveying various chemicals and petrochemical products. Whether it's transporting corrosive acids, bases, or other reactive substances, this stainless steel pipe's robustness ensures the integrity of the piping system. Its resistance to corrosion and high-temperature environments contributes to the safety and longevity of critical processes within the chemical and petrochemical industries.
Seamless 904L Stainless Steel Pipe differs from other stainless steel pipes in several ways, especially when compared to common grades like 316L and 304L:
Higher Alloy Content: 904L contains higher levels of chromium, nickel, molybdenum, and copper compared to 316L and 304L.
Superior Corrosion Resistance: It offers superior resistance to corrosion, especially in aggressive environments like sulfuric and phosphoric acid solutions.
Excellent Pitting and Crevice Corrosion Resistance: 904L provides excellent resistance to pitting and crevice corrosion.
High-Temperature Resistance: It exhibits better high-temperature performance compared to 316L and 304L.
Formability and Weldability: Seamless 904L Stainless Steel Pipe maintains excellent formability and weldability.
Resistance to Stress Corrosion Cracking and Intergranular Corrosion: It shows very good resistance to stress corrosion cracking and intergranular corrosion.
High Strength and Hardness: These pipes have high strength and hardness, even at extreme temperatures.
These differences make Seamless 904L Stainless Steel Pipe particularly suitable for demanding applications in corrosive and high-temperature environments where other stainless steel grades may not perform as effectively.
The manufacturing process of Seamless 904L Stainless Steel Pipe typically involves the following steps:
Raw Material Selection: High-quality 904L stainless steel billets or bars are selected as the raw material for the pipes.
Heating and Piercing: The selected billets are heated to a suitable temperature and then pierced to create a hollow tube.
Hot Extrusion: The pierced billet is then subjected to hot extrusion, where it is pushed through a die to form the desired pipe dimensions.
Heat Treatment: The newly formed pipe may undergo a heat treatment process to relieve stresses and improve its mechanical properties.
Cold Drawing: The pipe may be cold-drawn to achieve the desired dimensions, surface finish, and mechanical properties.
Annealing: The pipe is annealed to enhance its corrosion resistance and mechanical properties.
Finishing: The pipe’s surface is finished through processes like pickling, passivation, or polishing to meet the required specifications.
Quality Inspection: Rigorous quality control checks, including dimensional inspection, mechanical testing, and non-destructive testing, are conducted to ensure the pipe meets industry standards.
Packaging and Delivery: Once the pipes pass quality inspection, they are carefully packaged and prepared for shipment to customers.
Stainless steel pipe suppliers like Huaxiao play a crucial role in ensuring the quality and reliability of Seamless 904L Stainless Steel Pipes throughout the manufacturing process, from raw material selection to final delivery.
The maximum operating temperature for 904L Stainless Steel Pipe is typically around 450 degrees Celsius (824 degrees Fahrenheit). This alloy offers excellent high-temperature resistance, making it suitable for various applications in demanding environments. Stainless steel pipe suppliers, such as Huaxiao, can provide more specific temperature and pressure ratings based on their product specifications and industry standards.
Specific welding requirements for 904L Stainless Steel Pipe may vary depending on the project and application. Stainless steel pipe suppliers, like Huaxiao, can provide guidance on the recommended welding methods, filler materials, and preheat/interpass temperature ranges to ensure proper weld quality and corrosion resistance. It’s crucial to follow industry standards and the supplier’s recommendations for welding 904L stainless steel effectively and maintaining its exceptional properties. Always consult with experts or suppliers for precise welding specifications based on your project’s needs.
Yes, Seamless 904L Stainless Steel Pipe typically conforms to specific industry standards and may come with relevant certifications. Stainless steel pipe suppliers, such as Huaxiao, often ensure that their products meet international standards like ASTM (American Society for Testing and Materials) or EN (European Norms). These standards and certifications help guarantee the quality, durability, and corrosion resistance of the stainless steel pipes, making them suitable for various applications. It’s important to verify the specific standards and certifications with your supplier to ensure they meet your project’s requirements.
The production lead time for Seamless 904L Stainless Steel Pipe can vary depending on factors such as the supplier, order quantity, and specific product requirements. It’s advisable to contact stainless steel pipe suppliers, like Huaxiao, directly to inquire about their current lead times, as they can provide you with the most accurate and up-to-date information regarding the production and delivery schedule for your specific order. Lead times can vary, so it’s essential to discuss your project’s timeline and requirements with the supplier to ensure timely delivery.