SS 1.4539 Stainless Steel Mechanical Properties

What material is 1.4539?

Material 1.4539 (also known as 904L, UNS N08904, or X1NiCrMoCu25-20-5) is a highly alloyed super austenitic stainless steel. It is designed for extreme corrosion resistance, particularly in acidic, chloride-containing, and seawater environments. It features a high nickel (23–28%) and molybdenum (4–5%) content, which provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.

 

What is 1.4539 ASTM material equivalent to?

The EN designation for ASTM 1.4539 material is UNS N08904 or 904L stainless steel. While 1.4539 is a European (EN) standard, UNS N08904 (or "904L") is the corresponding standard under the UNS (Unified Numbering System), which is often used in the US.

Equivalents Of Grade 904L (USA: AISI, ASTM, UNS)

EU EN	USA -	France AFNOR	England BS	Sweden SS	Poland PN
X1NiCrMoCu25-20-5 (1.4539)	904L N08904	Z2NCDU25-20	904S13	2562	00H22N24M4TCu

 

1.4539 Material Equivalent Chemical Composition

Standards	Steel Grades
	Chemical Composition %
	C:	Mn:	Si:	P:	S:	Cr:	Ni:	Mo:	Ti:	Cu:	N:
EN	1.4539 - X1NiCrMoCu25-20-5 - X 1 NiCrMoCu 25-20-5
	<0.02	<2.0	<0.7	<0.030	<0.010	19.0 - 21.0	24.0 - 26.0	4.0 - 5.0	-	1.2 - 2.0	<0.15
ASTM	UNS N08904 - N 08904 - AISI 904L - AISI 904 L
	<0.02	<2.0	<1.0	<0.045	<0.035	19.0 - 23.0	23.0 - 28.0	4.0 - 5.0	-	1.0 - 2.0	<0.1
PN	0H22N24M4TCu
	<0.06	1.2 - 2.0	<1.0	<0.045	<0.030	20.0 - 22.0	24.0 - 26.0	4.0 - 5.0	<0.7	1.3 - 1.8	-
AFNOR	Z2NCDU25-20 - Z 2 NCDU 25-20 - Z2NCDU2520
	<0.02	<2.0	<0.4	<0.035	<0.010	19.0 - 21.0	24.0 - 26.0	4.0 - 5.0	-	1.0 - 2.0	-
BS	904S13 - 904 S 13
	<0.03	<2.0	<1.0	<0.040	<0.025	19.0 - 22.0	24.0 - 27.0	4.0 - 5.0	-	1.0 - 2.0	-
JIS	SUS 317 J5L TK - SUS 317 J5L TP - F SUS 317 J5L
	<0.02	<2.0	<1.0	<0.045	<0.030	19.0 - 23.0	23.0 - 28.0	4.0 - 5.0	-	1.0 - 2.0	-

 

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	-

 

Effect of Temperature on Mechanical Properties:

1.4539 has high strength at room temperature and maintains good strength at elevated temperatures (e.g., tensile strength of approximately 410 MPa at 500°C), but it is generally recommended for use below 450°C to avoid excessive oxidation.

 

1.4539 Stainless Steel Corrosion Resistance

904L alloy and its alternatives offer excellent resistance to intergranular corrosion in both the as-delivered and sensitized conditions, as well as pitting and stress corrosion. Furthermore, the steel exhibits high resistance to crevice and pitting corrosion, as well as good weldability. In the TMT process, the supersaturation temperature is 1050-1150°C, and the forging and rolling temperatures are 900-1200°C.

 

904L stianless steel suppliers

At GNEE, 904L stianless steel is available in various forms to meet diverse industrial needs:
🔹904L stianless steel Plates and Sheets (cold rolled and hot rolled)
🔹904L stianless steel Bars and Rods (round, square, hexagonal)
🔹904L stianless steel Tubes (seamless and welded)
🔹904L stianless steel Wires and Strips (for springs, fasteners, electrical applications)
🔹904L stianless steel Forgings and Custom Parts (according to drawings or specifications)
Testing and Documentation: Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, Destructive Testing Reports, Non-Destructive Testing Reports, PMI Test Reports, Visual Inspection Reports, Third-Party Inspection Reports, NABL Certified Laboratory Reports.
Packaging: Wooden crates, bubble wrap, steel strapping, or packaged according to customer requirements.