Steel Strip Profiles
904L Stainless Steel Strip
904L stainless steel strip offers exceptional corrosion resistance in aggressive environments, including sulfuric acid, phosphoric acid, and seawater. With its high alloy content, it is engineered for durability and stability in harsh industrial conditions. This alloy is widely chosen for applications where traditional stainless steels would fail due to pitting or corrosion attack.
Product Introduction
904L stainless steel strip is a high-alloy austenitic stainless steel developed for applications requiring excellent corrosion resistance in aggressive environments, including sulfuric acid, phosphoric acid, and chloride solutions. With high chromium, nickel, molybdenum, and copper content, it provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. 904L is non-magnetic and offers excellent formability and weldability.
Product Specifications
- Grade: 904L / UNS N08904
- Thickness: 0.01mm – 5.0mm
- Width: 10mm – 700mm
- Surface Finish: 2B, BA, No.4, HL, Mirror
- Edge: Slit Edge / Mill Edge
- Standard: ASTM B625, ASTM A240, EN 10088-2
Key Features
- 🛡️ Superior resistance to acids including H2SO4, H3PO4
- ⚙️ High alloy content for extreme corrosion resistance
- 🔧 Excellent weldability and formability
- 🌊 Resists pitting and chloride-induced corrosion
- 🌡️ Non-magnetic with high temperature stability
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.02 |
| Chromium (Cr) | 19.0 – 23.0 |
| Nickel (Ni) | 23.0 – 28.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.035 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 490 MPa |
| Yield Strength | ≥ 220 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 90 HRB |
Applications
- 🧪 Chemical processing and acid production
- 🌊 Desalination plants and marine systems
- 🏭 Pollution control and scrubber systems
- ⚗️ Storage tanks for corrosive chemicals
- 🧰 Pharmaceutical and food processing equipment
FAQ – Frequently Asked Questions
- ❓ Q: How is 904L different from 316L?
💡 A: 904L contains higher nickel and molybdenum, providing better acid resistance, especially against sulfuric acid. - ❓ Q: Is 904L stainless steel magnetic?
💡 A: No, it is non-magnetic in the annealed condition. - ❓ Q: Can 904L be used in seawater environments?
💡 A: Yes, it is well-suited for marine applications due to its high resistance to chloride corrosion. - ❓ Q: Does 904L require special welding techniques?
💡 A: No, it can be welded using standard methods without post-weld heat treatment.
