Baimaoxing
Baimaoxing
In the hierarchy of stainless steel alloys, 904L (UNS N08904) stands as a premier solution for environments where standard 316L fails. Originally developed to resist dilute sulfuric acid, 904L is a high-alloy austenitic stainless steel with low carbon content. Its unique chemistry—combining high levels of Chromium, Nickel, Molybdenum, and specific additions of Copper—makes it a "Super-Austenitic" grade. As a leading 904 Stainless Steel Round Steel Manufacturer, we understand that selecting this material is not just a purchase; it is a strategic investment in longevity and safety for critical infrastructure.
Unlike standard alloys, the inclusion of 1-2% Copper in 904L grants it exceptional resistance to strong reducing acids, particularly sulfuric and phosphoric acids. In the current global industrial landscape, where chemical processing temperatures and concentrations are reaching new heights to increase yield, 904L provides the "Safety Margin" that prevents catastrophic stress corrosion cracking (SCC) and pitting.
As the world pivots toward hydrogen energy, the demand for 904L round bars has surged. Its resistance to hydrogen embrittlement and corrosive electrolytes makes it the preferred choice for electrolyzer components and storage systems.
With water scarcity rising, mega-desalination plants in the Middle East and North Africa are moving toward 904L for high-pressure pump shafts and valves, ensuring a 30+ year service life in hyper-saline conditions.
The semiconductor industry requires ultra-high purity gas delivery systems. 904L's superior surface finish capabilities and chemical stability prevent contamination in Grade 1 cleanroom environments.
Higher Nickel Content than 316L
Life Cycle Extension in Acidic Media
Recyclable & Sustainable Material
Ultra-Low Carbon for Weldability
Shandong Baimaoxing Iron and Steel Co., Ltd. is at the forefront of the "Industry 4.0" revolution. Our manufacturing facility in Liaocheng integrates AI-driven quality control and automated spectral analysis to ensure every 904L round bar meets exact ASTM and EN standards.
Located in Liaocheng City, Shandong Province, China, we are a large steel supplier specializing in R&D, processing, sales, and technical services. Our expertise spans across stainless steel, copper, aluminum, and titanium alloys, serving industries from aerospace to petrochemicals.
We provide customers with steel and its deep processed products, as well as customized, specialized, and one-stop services.
Baimaoxing has a large number of outstanding professionals with many years of work experience in metallurgy and logistics.
ISO9001:2015 certified. Products comply with EU ROHS standards and undergo SGS environmental testing.
| Element | Composition (%) | Benefit |
|---|---|---|
| Chromium (Cr) | 19.0 - 23.0 | Primary corrosion resistance & oxidation protection |
| Nickel (Ni) | 23.0 - 28.0 | Austenite stability & Stress corrosion cracking resistance |
| Molybdenum (Mo) | 4.0 - 5.0 | Resistance to pitting and crevice corrosion |
| Copper (Cu) | 1.0 - 2.0 | Superior resistance to sulfuric acid |
The PREN (Pitting Resistance Equivalent Number) of 904L is typically ≥ 34, which is significantly higher than 316L (PREN ~24). This makes our 904L round steel ideal for marine engineering where chloride-induced pitting is a constant threat.
In the North Sea or Gulf of Mexico, downhole environments contain high H2S and CO2 levels. Our 904L round bars are used for valve stems and packers to prevent sulfide stress cracking.
Cleaning agents used in pharmaceutical vessels (CIP processes) often involve aggressive acids. 904L maintains a smooth, non-reactive surface, ensuring batch purity.
904L is famous for its use in luxury Swiss watches due to its ability to take a high polish and its total resistance to human sweat and salt water.
The harsh chloride environments in paper bleaching require the resilience of super-austenitic steels to avoid frequent downtime.
As the global industrial landscape becomes more demanding, the need for a reliable, expert, and authoritative supplier is paramount. At Shandong Baimaoxing Iron and Steel Co., Ltd., we don't just sell metal; we provide engineering solutions. Our deep understanding of 904L's metallurgy, combined with our China Factory 4.0 infrastructure, ensures that our partners receive materials that are precisely manufactured for their specific application environments. From aerospace to marine engineering, we are your trusted bridge to high-performance metallurgy.
