is 904l stainless steel magnetic？

​​904L (UNS N08904)​​, also known as ​​W.Nr. 1.4539​​, is a ​​low-carbon super austenitic stainless steel​​. With the addition of ​​copper​​, it exhibits ​​superior corrosion resistance​​ compared to conventional chromium-nickel stainless steels (e.g., SS316L and SS317L). While its use in ​​hydrochloric acid​​ is limited, ​​904L​​ demonstrates ​​exceptional resistance to pitting, crevice corrosion in chloride solutions​​, and ​​outstanding stress corrosion cracking (SCC) resistance​​. This steel is ​​non-magnetic​​, offers ​​excellent formability and weldability​​, and maintains ​​good toughness at low temperatures​​.

 

Metallurgical Structure​​

904L has a ​​fully austenitic structure​​ and is ​​less sensitive to ferrite and α-phase precipitation​​ compared to other high-molybdenum austenitic stainless steels.

 

Equivalent Grade of 904L Stainless Steel Coil

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	KS	AFNOR	EN
SS 904L	1.4539	N08904	SUS 904L	904S13	STS 317J5L	Z2 NCDU 25-20	X1NiCrMoCu25-20-5

Chemical Composition of SS 904L coils

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	Cu
SS 904L	0.020 max	2.00 max	1.00 max	0.040 max	0.030 max	19.00 - 23.00	4.00 - 5.00 max	23.00 - 28.00	1.00 - 2.00

Mechanical Properties of 904L SS Sheet

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
7.95 g/cm3	1350 °C (2460 °F)	Psi - 71000 , MPa - 490	Psi - 32000 , MPa - 220	35 %

 

Corrosion Resistance Performance:​​

904L stainless steel exhibits ​​outstanding corrosion resistance​​, capable of withstanding corrosive media such as ​​acidic solutions, saline water, and chlorides​​. It performs exceptionally well in ​​strong acids, strong alkalis, and high-chloride environments​​, demonstrating ​​superior resistance to pitting and stress corrosion cracking (SCC)​​.

 

Hot Working & Welding​

Hot Forging​​: Maximum heating temperature: ​​1180°C​​; minimum forging temperature: ​​≥900°C​​.

​​Hot Forming​​: Can be performed within ​​1000-1150°C​​.

​​Heat Treatment​​: Annealing at ​​1100-1150°C​​, followed by ​​rapid cooling​​.

​​Welding​​: ​​904L is suitable for various welding methods​​, with ​​manual arc welding (MMA) and TIG welding​​ being the most recommended.

 

​Applications of 904L Stainless Steel:​​

904L stainless steel offers ​​excellent corrosion resistance, heat resistance, low-temperature strength, and mechanical properties​​. It exhibits ​​good hot workability (e.g., stamping, bending)​​ without ​​hardening during heat treatment​​.

​​Widely used in:​​

​​Household items​​ (Type 1 & 2 cutlery)

​​Cabinets, indoor pipelines, water heaters​​

​​Boilers, bathtubs, automotive parts​​

​​Medical devices, construction materials​​

​​Chemical, food processing, agriculture, marine components​

 

Is 904L a Duplex Steel?​​

​​Duplex steel (DP steel)​​ consists of a two-phase microstructure of ​​martensite, austenite, or bainite with a ferrite matrix​​. However, ​​904L is not a duplex steel​​ but rather a ​​high-alloy austenitic stainless steel​​. Despite this, its ​​excellent corrosion resistance, high strength, and superior mechanical properties​​ make it a ​​high-performance alternative​​ in many applications.

 

 

If you have a project need for 904L stainless steel plate, please feel free to place an order. GNEE has a large inventory of popular products for you to choose from. We can process them into a variety of practical product forms, including plates, coils, tubes, bars, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.

904L stainless steel plate and coil stock sizes: 0.3mm-350mm (thickness)
904L stainless steel bar stock sizes: 3.0mm-500mm (diameter)