Baimaoxing
Baimaoxing
In the modern industrial landscape, traditional stainless steel grades like 304 and 316 often fail when confronted with highly corrosive media such as dilute sulfuric acid, chlorides, and phosphoric acid. This is where 904L (UNS N08904) Stainless Steel emerges as a critical material solution. As a non-stabilized low-carbon high-alloy austenitic stainless steel, 904L is enriched with copper, which significantly improves its resistance to strong reducing acids.
The global demand for 904L coil and plate has seen a 15% year-on-year growth, driven primarily by the expansion of the chemical processing, seawater desalination, and green energy sectors. Unlike standard alloys, 904L offers a high Pitting Resistance Equivalent Number (PREN), typically ranging between 34-36, making it an indispensable asset for engineering firms looking to lower their Levelized Cost of Equipment (LCOE) through extended service life.
Based in the Liaocheng steel hub, we integrate raw material sourcing and precision rolling to reduce lead times by 30% compared to Western suppliers.
Utilizing high-precision cold-rolling and hot-rolling mills to ensure thickness tolerances within +/- 0.02mm for high-end applications.
ISO 9001:2015 certified. Every batch of 904L undergoes PMI testing and intergranular corrosion tests to meet ASTM A240 standards.
Essential for heat exchangers, reaction vessels, and piping systems handling sulfuric and phosphoric acids where 316L would pit and crack.
Superior resistance to crevice corrosion in warm seawater, making it the preferred choice for RO membranes and offshore cooling systems.
Widely used in Flue Gas Desulfurization (FGD) scrubbers within power plants to resist the aggressive condensate formed during gas cleaning.
The chemical composition of 904L is its greatest strength. By increasing the Nickel content to 25% and adding Molybdenum (4.5%) and Copper (1.5%), the steel creates a passive protective film that is far more resilient than that of standard grades. This specific chemistry prevents Stress Corrosion Cracking (SCC), a common failure mode in chemical engineering.
| Grade | Cr (%) | Ni (%) | Mo (%) | Cu (%) | Corrosion Resistance |
|---|---|---|---|---|---|
| AISI 316L | 16-18 | 10-14 | 2-3 | - | Moderate |
| AISI 904L | 19-23 | 23-28 | 4-5 | 1-2 | Extreme |
The industry is moving toward "Thin-Gauge High-Strength" solutions. OEMs are now focusing on bright annealed (BA) finishes for 904L coils to cater to the luxury watchmaking industry and precision instrumentation. Furthermore, sustainability is becoming a procurement mandate, with many factories adopting EAF (Electric Arc Furnace) methods to reduce the carbon footprint of stainless steel production.
A: The cost is driven by the high Nickel (25%) and Molybdenum (4.5%) content. These elements are expensive commodities but are essential for providing the grade's superior corrosion resistance in severe acidic environments.
A: Yes, 904L has good weldability using common methods like TIG, MIG, and SMAW. However, it is recommended to use over-alloyed filler metals (like E904L) to maintain the corrosion resistance of the weld bead.
A: For standard coil sizes, lead times are usually 7-15 days. For customized plates with specific surface finishes or precision cutting, it may take 20-30 days including full MTC (Mill Test Certification) preparation.
A: Absolutely. As a quality-centric supplier, we welcome third-party inspections to verify chemical composition and mechanical properties before shipment.
Shandong Baimaoxing Iron and Steel Co., Ltd. is located in Liaocheng City, Shandong Province, China. We are a large steel supplier specializing in research and development, processing, sales, and technical services. Our business covers steel pipes, steel plates, round bars, steel coils, angle bars, and high-performance alloys including titanium and copper. Baimaoxing adopts a scientific management model, and its products are widely used in industries such as aerospace, military equipment, petrochemicals, and precision machining.
For international buyers, sourcing 904L requires a balance between technical compliance and logistical efficiency. Key procurement trends include:
As a leading 904L OEM supplier, we provide comprehensive material documentation, including Grade 3.1 certification, ensuring that your procurement meets the most stringent industrial regulations across Europe, the Americas, and Southeast Asia.
