What material is 1.4539 stainless equivalent to?
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What is 1.4539 stainless steel?
1.4539 stainless steel (UNS N08904, 904L ) is a high alloy austenitic stainless steel. Its approximate composition of 20% Cr, 25% Ni, 4.0% Mo and 1.5% Cu ensures a Pitting Resistance Equivalent Number (PREN) of approximately 43. It was developed for sulfuric acid service with major concentrations ranging from 20% to 85%.
What material is 1.4539 stainless equivalent to?
| Standard | Equivalent Grade |
|---|---|
| ASTM | 904L / UNS N08904 |
| DIN | X1NiCrMoCu25-20-5 |
| ISO | 904L |
| JIS | SUS890L |
| AFNOR (France) | Z2NCDU25-20 |
What is the standard of 1.4539 Stainless steel?
| Grade : | X1NiCrMoCu25-20-5 | |||||
| Number: | 1.4539 | |||||
| Classification: | Austenitic stainless steel | |||||
| Density: | 8 g/cm ³ | |||||
| Standard: |
|
Chemical Composition of 1.4539 Stainless Steel (wt%)
| Element | Minimum (%) | Maximum (%) |
|---|---|---|
| C (Carbon) | - | 0.020 |
| Si (Silicon) | - | 1.00 |
| Mn (Manganese) | - | 2.00 |
| P (Phosphorus) | - | 0.045 |
| S (Sulfur) | - | 0.035 |
| Cr (Chromium) | 19.0 | 23.0 |
| Ni (Nickel) | 23.0 | 28.0 |
| Mo (Molybdenum) | 4.0 | 5.0 |
| Cu (Copper) | 1.0 | 2.0 |
| N (Nitrogen) | - | 0.10 |
| Fe (Iron) | Balance | - |
Mechanical Properties of 1.4539 / 904L Stainless Steel
| Property | Value (Typical) | Test Standard |
|---|---|---|
| Tensile Strength (Rm) | 490–710 MPa | EN ISO 6892-1 |
| Yield Strength (Rp0.2) | ≥ 220 MPa | EN ISO 6892-1 |
| Elongation (A5) | ≥ 35% | EN ISO 6892-1 |
| Hardness (Brinell) | ≤ 220 HBW | EN ISO 6506-1 |
| Modulus of Elasticity | ~195 GPa | - |
| Density | ~8.0 g/cm³ | - |
Physical Properties of 1.4539 Stainless Steel
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1300–1390°C |
| Thermal Conductivity (20°C) | 12.0 W/m·K |
| Electrical Resistivity | 0.95 μΩ·m |
| Specific Heat (20°C) | 500 J/kg·K |
| Coefficient of Thermal Expansion (20–100°C) | 15.0 ×10⁻⁶ /K |
Heat Treatment of 1.4539 Stainless Steel
| Process | Temperature Range | Notes |
|---|---|---|
| Solution Annealing | 1090 – 1175°C | Followed by rapid cooling (usually water quenching) |
| Stress Relieving | Not commonly used | Risk of reduced corrosion resistance |
| Hardening | Not hardenable by heat treatment | Only via cold working |
What is the difference between 1.4539 stainless steel and 1.4404?
1.1.4539 stainless steel (904L) and 1.4404 stainless steel (316L) are both austenitic stainless steels, but their alloy content and corrosion resistance vary greatly.
2.904L contains higher nickel (23–28%) and has added copper (1–2%), which enhances its resistance to strong reducing acids such as sulfuric acid and improves its resistance to pitting and crevice corrosion in chloride-rich environments. In contrast, 316L has a lower nickel content (10–14%) and no copper, which makes it suitable for general corrosion resistance but less effective in highly aggressive chemicals or seawater conditions.
3.As a result, 904L is often used in chemical processing, marine equipment, and pharmaceutical industries, where excellent corrosion resistance is critical, while 316L is more commonly used in food-grade, construction, and general industrial environments.
1.4539 stainless steel (904L) is your go-to material when standard stainless grades fail in aggressive environments. Its global equivalents like UNS N08904 or SUS890L prove its international recognition.
Looking for a reliable supplier of 1.4539 stainless steel with fast lead time, quality assurance, and technical support?
Why Choose Gnee as Your 1.4539 Stainless Steel Supplier?
1.Certified Quality
All Gnee 1.4539 stainless steel products comply with EN 10088, ASTM A240, and PED/AD2000 requirements. Every batch is tested with PMI, intergranular corrosion tests, and ultrasonic inspection.
2.Wide Product Range
We supply 904L stainless steel plates, pipes, tubes, fittings, and bars in various dimensions. Surface finishes include 2B, No.1, No.4, and BA, suitable for marine and chemical environments.
3.Fast Delivery & Customization
With large inventories and flexible processing services (cutting, polishing, welding, and packaging), we can meet urgent delivery schedules and custom project requirements.
Contact Gnee today to get a competitive quote and professional guidance tailored to your project.
