904L Stainless Steel Bar Supplier In China
Diameter: 3mm-480mm, 1/8″ to 2 1/4″
Standard: GB1220, ASTM A484/484M, EN 10060/ DIN 1013 ASTM A276, EN 10278, DIN 671
Shape: round, flat, square, angle, hexagonal
Finish: Black, NO.1, mill finish, cold draw, H9, H11
Product Description Of 904L Stainless Steel Bar
904L Stainless Steel Bar, an austenitic grade, boasts elevated nickel (Ni) and chromium (Cr) content, exceeding 316L with twice the Ni and added molybdenum (Mo). Renowned for high-temperature oxidation resistance, pitting, and exceptional resistance to reducing acids like sulfuric acid, attributed to its increased Cu content.
Compared to 316L, the inclusion of molybdenum in 904L confers superior resistance to localized attacks such as pitting and crevice corrosion. Remarkably adept against chloride ions, it further enhances resistance to reducing acids. Notably, its surplus copper content endows SS UNS N08904 Bright Bar with practical corrosion resistance against varying sulfuric acid concentrations.
904L Stainless Steel Bar stands as a pinnacle of durability and corrosion resilience, offering versatility across harsh environments and aggressive chemical exposures. Renowned for its unique blend of elements, this alloy remains a top choice for applications demanding superior corrosion resistance and extended service life. Its robust properties make it invaluable in industries ranging from chemical processing and oil refining to marine environments and pharmaceuticals, ensuring enduring performance under demanding conditions.
specification Of 904L Stainless Steel Bar
chemical components of 904L stainless steel bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.020 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 19.00 – 23.00 |
| Nickel (Ni) | 23.00 – 28.00 |
| Molybdenum (Mo) | 4.00 – 5.00 |
| Copper (Cu) | 1.00 – 2.00 |
physical property of 904L stainless steel bar
| Physical Property | Value |
|---|---|
| Density | 7.95 g/cm³ |
| Melting Range | 1300 – 1390°C |
| Specific Heat Capacity | 450 J/kg·K |
| Electrical Resistivity | 0.95 x 10^-6 Ω·m |
| Thermal Conductivity | 11.5 W/m·K |
| Thermal Expansion | 15.0 µm/m°C (20-100°C) |
| Modulus of Elasticity (Young’s Modulus) | 190 GPa |
| Hardness (Brinell) | ≤ 200 HB |
mechanical property of 904L stainless steel bar
| Mechanical Property | Value |
|---|---|
| Tensile Strength | 490 – 690 MPa |
| Yield Strength (0.2% offset) | ≥ 220 MPa |
| Elongation | ≥ 35% |
| Reduction in Area | ≥ 55% |
| Hardness (Rockwell B) | ≤ 90 (max) |
features Of 904L Stainless Steel Bar
904L stainless steel bar boasts an exceptionally elevated composition of nickel (Ni) and chromium (Cr), surpassing typical levels found in 316L. With roughly twice the nickel content of 316L and heightened chromium levels, this alloy offers enhanced corrosion resistance and structural stability. Additionally, the increased molybdenum (Mo) content further fortifies its resistance to corrosive elements, contributing significantly to its remarkable durability and performance in challenging environments. This unique blend of elements affords 904L stainless steel bar superior resistance to oxidation, pitting, and various forms of corrosion, positioning it as a highly sought-after alloy in industries demanding heightened durability and resilience against harsh conditions.
The distinguishing feature of 904L stainless steel bar lies in its exceptional resistance to high-temperature oxidation. This is attributed to its elevated chromium (Cr) and nickel (Ni) composition, coupled with increased levels of molybdenum (Mo). These elements create a protective oxide layer on the surface, mitigating the adverse effects of oxidation even at elevated temperatures. This unique alloy composition ensures that the stainless steel bar retains its structural integrity and resists degradation when subjected to high-temperature environments, making it an optimal choice for applications demanding prolonged exposure to elevated heat without compromising its performance or durability.
The exceptional feature defining 904L stainless steel bar is its remarkable resistance against localized corrosion, particularly pitting. This attribute is a result of its augmented chromium (Cr) and nickel (Ni) content, along with higher levels of molybdenum (Mo). The alloy’s composition forms a defensive barrier, preventing the initiation and progression of pitting corrosion even in aggressive environments. This outstanding resistance to pitting ensures the stainless steel bar maintains its structural integrity and longevity, making it highly suitable for applications susceptible to localized attacks and harsh corrosive conditions, where durability and resilience against corrosion are imperative.
The distinguishing characteristic of 904L stainless steel bar is its commendable resistance to reducing acids, exemplified by its heightened composition of chromium (Cr), nickel (Ni), and molybdenum (Mo). This composition grants exceptional protection against reducing acids, such as sulfuric acid, and enhances its ability to withstand aggressive chemical environments. The alloy’s configuration forms a robust barrier, ensuring longevity and structural integrity when exposed to reducing acids, making it an optimal choice for applications demanding resistance to these corrosive agents while maintaining performance and reliability under challenging conditions.
The noteworthy attribute of 904L stainless steel bar is its remarkable corrosion resistance to sulfuric acid, owing to its unique composition rich in chromium (Cr) and nickel (Ni), along with heightened levels of molybdenum (Mo) and copper (Cu). This amalgamation creates a robust defense mechanism, endowing the alloy with exceptional resilience against varying concentrations of sulfuric acid. Notably, the additional copper content in SS UNS N08904 Bright Bar extends its usefulness by ensuring efficient corrosion resistance against all sulfuric acid concentrations. This exceptional resistance to sulfuric acid corrosion distinguishes 904L stainless steel bar as an ideal choice for applications where superior resistance to corrosive agents, particularly sulfuric acid, is imperative.
application Of 904L Stainless Steel Bar
Oil and Petrochemical Equipment
904L stainless steel bar stands as a pivotal choice in Oil and Petrochemical Equipment due to its exceptional corrosion resistance. Utilized extensively in reactors, and critical components subjected to aggressive chemicals and high-temperature operations. Its high nickel, chromium, and molybdenum content fortify it against corrosive mediums, ensuring durability in harsh environments. This alloy exhibits superior resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, crucial for maintaining structural integrity in harsh petrochemical conditions. The alloy's reliability in combating corrosion, along with its longevity, positions 904L stainless steel bar as a cornerstone material in ensuring equipment longevity and safety in these industries.
Sulfuric Acid Storage and Transportation Equipment
In the domain of Sulfuric Acid Storage and Transportation Equipment, 904L stainless steel bar assumes paramount importance owing to its remarkable resistance to sulfuric acid corrosion. Employed extensively in fabricating storage tanks, and handling equipment due to its elevated chromium, nickel, and molybdenum content. The alloy's unique composition forms a robust barrier against the corrosive effects of sulfuric acid, ensuring structural integrity and longevity of the equipment. Its exceptional corrosion resistance in varying sulfuric acid concentrations makes it a preferred choice, guaranteeing safety and reliability in critical applications where resistance to sulfuric acid corrosion is imperative.
Power Plant Flue Gas Desulfurization Units
In the realm of Power Plant Flue Gas Desulfurization Units, 904L stainless steel bar serves as an indispensable material due to its exceptional resistance to sulfide corrosion. Essential in crafting critical components like absorption tower bodies, baffles, internal parts, and spray systems. Its high nickel, chromium, and molybdenum content confer unparalleled resistance against sulfide-induced corrosion, ensuring prolonged durability under corrosive flue gas conditions. The alloy's capability to withstand harsh chemical environments and combat sulfide corrosion makes it a prime choice, safeguarding the structural integrity and reliability of crucial components in flue gas desulfurization systems, ensuring operational efficiency and safety.
Equipment in Organic Acid Treatment Systems
In the domain of Equipment in Organic Acid Treatment Systems, 904L stainless steel bar is pivotal due to its exceptional corrosion resistance. Vital in fabricating critical components like washers, fans, and vessels handling highly corrosive organic acids. Its elevated chromium, nickel, and molybdenum content fortify it against aggressive corrosive mediums, ensuring extended durability in harsh organic acid environments. The alloy's resistance to corrosion-induced cracking, pitting, and crevice corrosion safeguards structural integrity, guaranteeing reliability and longevity of equipment. This material's resilience in combating corrosive organic acids positions 904L stainless steel bar as an indispensable choice for ensuring operational efficiency and safety in organic acid treatment systems.
FAQ
The distinction between 904L and 316L stainless steel bar properties lies primarily in their composition and resulting characteristics. 904L exhibits higher nickel (Ni), chromium (Cr), and molybdenum (Mo) content compared to 316L. This heightened composition renders 904L superior corrosion resistance, especially in harsh environments containing acids, chlorides, and corrosive agents. While both alloys offer excellent weldability and formability, 904L’s enhanced resistance against pitting, crevice corrosion, and stress corrosion cracking stands out. Stainless steel bar suppliers often favor 904L for applications demanding exceptional corrosion resistance, whereas 316L, though corrosion-resistant, is preferred in less aggressive environments due to its economical advantage.
904L stainless steel bar, renowned for its exceptional corrosion resistance, exhibits a high level of resistance against rust or corrosion in various environments. The alloy’s composition, with elevated levels of nickel, chromium, and molybdenum, forms a protective passive layer on its surface, preventing oxidation and corrosion in aggressive conditions. However, in exceedingly harsh environments or under specific conditions, such as prolonged exposure to highly corrosive mediums or extreme temperatures, 904L stainless steel bars might undergo minimal surface corrosion. Stainless steel bar suppliers recommend proper handling and maintenance to ensure the alloy’s extended resistance against rust, making it a reliable choice for corrosive environments.
Yes, 904L stainless steel bar generally exhibits weak magnetic properties. While it contains a higher content of nickel and chromium, which are non-magnetic elements, the alloy might still display slight magnetism due to its microstructure and composition. However, this magnetism is usually significantly weaker compared to standard ferromagnetic materials. Stainless steel bar suppliers acknowledge the weak magnetic behavior of 904L stainless steel bars, considering it when applying these materials in various industries and applications requiring specific magnetic properties.
The dissimilarity between 904L and 304 stainless steel bar properties primarily lies in their composition and resultant characteristics. 904L contains higher nickel, chromium, and molybdenum levels compared to 304. This composition grants 904L superior corrosion resistance, especially in aggressive environments containing acids, chlorides, and corrosive agents. While both alloys offer good weldability and formability, 904L’s enhanced resistance against pitting, crevice corrosion, and stress corrosion cracking stands out. Stainless steel bar suppliers often favor 904L for applications demanding exceptional corrosion resistance, whereas 304, being more cost-effective and versatile, is preferred in general-purpose applications where extensive corrosion resistance is not the primary concern.
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