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904L Stainless Steel Forgings - UNS N08904 Alloy Bars with High Wear Resistance
Product Specifications
Attribute
Value
Brand
Zhonggong Special Metallurgy
Name
Austenitic Stainless Steel
Model
904L stainless steel
Density
8.0g/cm³
Main components
20Cr-24Ni-4.3Mo-1.5Cu
Form Of Supply
Bars, plates, pipes, forged parts, etc
Product Overview
904L Stainless Steel (UNS N08904) is a super austenitic stainless steel containing:
Chromium: 14.0-18.0%
Nickel: 24.0-26.0%
Molybdenum: 4.5%
This low-carbon, high-nickel, molybdenum-enhanced alloy demonstrates exceptional passivation capability and corrosion resistance.
Key Properties
Acid Resistance: Excellent performance in sulfuric acid (<70°C), all concentrations/temperatures of acetic acid (atmospheric pressure), and formic-acetic acid mixtures
Chloride Resistance: Superior resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride media
General Corrosion: Proven resilience in phosphoric acid and other non-oxidizing acids
Technical Characteristics
Metallurgical Structure: Fully austenitic structure with reduced sensitivity to ferrite/alpha phase precipitation compared to conventional high-molybdenum austenitic steels.
Physical/Mechanical Properties:
Density: 8.0 g/cm³
Tensile Strength: ≥520 MPa
Elongation: ≥35%
Corrosion Resistance
Ultra-low carbon (≤0.020%) prevents carbide precipitation during heat treatment/welding
High Cr-Ni-Mo-Cu content enables passivation even in reducing environments
Demonstrated performance in specific media:
Sulfuric acid: ≤40°C at 0-98% concentration
Phosphoric acid: Excellent in 0-85% pure acid
Chloride solutions: Superior pitting/crevice corrosion resistance
Limited hydrochloric acid use (≤2% concentration) with performance exceeding conventional grades
Primary Applications
Chemical Processing: Reactors, acid storage/transport, scrubbers
Power Generation: Flue gas desulfurization systems