What Material Is 1.4539 Equivalent To?

What Is 1.4539 Stainless Steel?

1.4539 stainless steel, also known as 904L, is a high-alloy austenitic stainless steel containing high levels of chromium, nickel, molybdenum, and copper, designed for excellent corrosion resistance in aggressive environments such as strong acids, seawater, and chloride-rich conditions.

 

What Material Is 1.4539 Equivalent To?

Standard	Equivalent Grade
ASTM	904L / UNS N08904
DIN	X1NiCrMoCu25-20-5
ISO	904L
JIS	SUS890L
AFNOR (France)	Z2NCDU25-20

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

1.4539 stainless steel (904L) vs. 1.4404 stainless steel (316L)

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.
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.
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.