904l stainless steel plate composition

904L Stainless Steel Plate (UNS N08904 / 1.4539)​​ is a ​​super austenitic stainless steel​​, designated as ​​00Cr20Ni25Mo4.5Cu​​ in China, corresponding to U.S. standard ​​N08904​​ and German standard ​​1.4539​​. This material features a ​​carbon content below 0.03%​​, with ​​18-20% chromium​​, ​​23-25% nickel​​, ​​3-4% molybdenum​​, and ​​4-5% copper​​, delivering ​​exceptional corrosion resistance​​, particularly in ​​dilute sulfuric acid, phosphoric acid, and chloride-rich environments​​, with resistance to ​​stress corrosion cracking and pitting​​.

 

​​Weldability of 904L Stainless Steel​​

904L stainless steel plates are available in ​​hot-rolled, cold-rolled, and precision-rolled​​ types. At room temperature, they exhibit a ​​tensile strength of 490 MPa​​, ​​elongation of 35%​​, and a ​​density of 8.24 g/cm³​​. They offer ​​good weldability​​, supporting ​​manual arc welding and gas-shielded welding​​, with ​​no preheating required​​ but ​​localized temperatures must not exceed 100°C​​.

 

​​Machinability of 904L Stainless Steel​​

It has ​​excellent cold-working properties​​, making it suitable for ​​stamping and bending​​. It is widely used in ​​petrochemical, seawater treatment, and flue gas desulfurization​​ applications, including ​​reactors, heat exchangers, and food processing equipment​​. Through optimized ​​rolling and annealing processes​​, the comprehensive performance of thin plates can be enhanced to meet the needs of industries such as ​​electronics and pharmaceuticals​​.

 

SS 904L Sheets & Plates Equivalent Grades

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

904l stainless steel chemical compatibility, max %

C	Mn	P	S	Si	Cr
0.02	2.00	0.045	0.035	1.00	19.0-23.0
Ni	Mo	N	Cu	Others
23.0-28.0	4.0-5.0	0.10	1.0-2.0

A240 904L Stainless steel Plate Mechanical Properties

Grade	Tensile Str., min, MPa	0.2% Yield Str., min, MPa	E.L in 50mm, min %	max HRB
A240 TP 904L	490	220	35	90

 

What is the difference in composition between 904L and 316L?

The core difference in composition between 904L and 316L stainless steel lies in the content of key alloying elements: As a super austenitic stainless steel, 904L contains 19-23% chromium, 23-28% nickel, 4-5% molybdenum, and 1-2% copper, with a carbon content of ≤0.02%; while 316L has a chromium content of 16-18%, nickel of 10-14%, molybdenum of 2-3%, contains no copper, and has a carbon content of ≤0.03%.

In comparison, the addition of high nickel, high molybdenum and copper in 904L makes it far superior to 316L in terms of corrosion resistance, especially in resisting strong acids and high chloride environments, but 316L has an advantage in cost.

 

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 in stock: 0.3mm-350mm (thickness)
904L stainless steel bar in stock: 3.0mm-500mm (diameter)
904L stainless steel wire in stock: 0.1mm-20mm (wire diameter)

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