904L
904L
Apar Alloys offers 904L, a high-performance austenitic stainless steel known for its exceptional resistance to strong acids, chloride-rich environments, and highly corrosive industrial conditions. With a unique blend of nickel, chromium, molybdenum, and copper, 904L provides superior resistance to pitting, crevice corrosion, and stress corrosion cracking. It is widely regarded as an upgrade over conventional stainless steels and Duplex grades, especially in harsh chemical, marine, and high-chloride applications.
904L exhibits excellent mechanical properties, outstanding corrosion resistance, and reliable performance across a broad temperature range. Its high nickel content ensures structural stability, while added copper enhances its resistance to sulfuric acid and reducing environments. Apar Alloys is a trusted Supplier and Stockist of certified 904L materials, offering consistent quality, long-term durability, and superior operational performance for critical industrial processes.
Specifications
| Grade | AISI | UNS | ASTM A276 / A479 | ASTM A182 | EN (W-Nr) | DIN Spec |
|---|---|---|---|---|---|---|
| 904L | 904L | N08904 | ASTM A276 / A479 | ASTM A182 | 1.4539 | X1NiCrMoCu25-20-5 |
General Characteristics
High-nickel, high-molybdenum austenitic stainless steel
Excellent resistance to pitting and crevice corrosion
Exceptional performance in chloride-rich and acidic environments
Superior resistance to sulfuric acid, phosphoric acid, and seawater
High mechanical strength and structural stability
Excellent weldability and fabrication characteristics
Chemical Composition (nominal) %
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 904L | ≤0.02 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.035 | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 | ≤0.10 | 1.0–2.0 | Balance |
Applications
Chemical and petrochemical processing systems
Seawater handling, desalination plants, and marine engineering
Pollution-control and gas-scrubbing systems
Heat exchangers, condensers, and evaporators
Food and pharmaceutical equipment exposed to acidic media
Pulp & paper, fertilizer, and industrial process equipment
Advantages
- Outstanding resistance to strong reducing acids and chlorides
- Superior pitting, SCC, and crevice corrosion protection
- Excellent weldability and fabrication characteristics
- High strength and structural stability at elevated temperatures
- Long-term performance with reduced maintenance needs
- A better alternative to 316L, 317L, and even Duplex grades in many corrosive environments
Mechanical Properties (Typical at Room Temperature)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 490 – 740 |
| Yield Strength (MPa) | 220 – 300 |
| Elongation (%) | 35 – 40 |
| Hardness | 150 – 190 HB |
Why Choose Apar Alloys
Reliable Supplier & Stockist
Wide range of ready-to-dispatch 904L materials.
Global Sourcing Network
Materials sourced from reputed international mills for consistent quality.
Strict Quality Assurance
Every batch passes complete testing, inspection, and certification.
Custom Sizes & Finishes
Tailor-made cuts, sizes, and finishes to meet exact project needs.
Competitive Pricing & Timely Delivery
Cost-effective solutions with guaranteed on-time supply.
Technical Expertise & Support
End-to-end guidance from selection to application
Get in Touch
Contact Us
Looking for reliable supply of 904L Stainless Steel? Contact Apar Alloys for specifications, customized options, and competitive pricing for 904L Bars, Plates, Sheets, Pipes & Components.
[Call] +91 98333 89128
301, 3rd floor, A WING, Krishvi Escape, Near Vinay Health Home, Fanaswadi Bhuleshwar, Mumbai - 400002.
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