904L,UNS N08904,W-Nr.1.4539

904L

UNS N08904

W-Nr.1.4539

Diameter 2 - 75 mm

Smelting Technology：IF/EAF/LF/AOD/VOD/VIM/ESR/VAR

Quality Control: Component testing, mechanical properties testing,Ultrasonic testing for inner side,Eddy current testing for surface...

AISI 904L N08904/W-Nr.1.4539, X1NICRMOCU25-20-5

904L is a grade of super austenitic steel, partially classified as nickel alloys. Provided in the form of long and flat products, it is used mainly in the chemical, energy and petrochemical industries, showing resistance to various concentrations at high temperatures of sulfuric acid, phosphoric acid, nitric acid and orthophosphoric acid.

904L and its substitutes belong to the group of steels resistant to intercrystalline corrosion in delivery and sensitized condition, which goes hand in hand with resistance to pitting and stress corrosion. In addition, it is characterized by increased slit and pitting corrosion resistance, and good weldability. in the manner of TMT, the supersaturation is carried out at temperatures of 1050 - 1150 ℃ and forging and rolling at 900 - 1200 ℃.

Chemical composition:

Grade	C	Si	Mn	S	P	Cr	Ni	N	Mo	Cu
904L	≤0.02	≤1.0	≤2.0	≤0.035	≤0.045	19-23	23-28	≤0.1	4.0-5.0	1.0-2.0

Mechanical and physical properties :

Tensile strength, Rm = 530 - 570 MPa

Yield point, Rp0,2: >230 MPa

Elongation, A: >35%

Modulus of elasticity,E: 195 GPa

Heat capacity, cp20℃= 450 J * kg-1 * K-1

Heat conductivity, λ: 12 W * m-1 * K-1

Linear Expansion Factor, α20℃=15,8 * 10-6 K-1

Specific resistance: 1 Ω * mm2/m

Hardness: <230 HB

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904L

Mechanical and physical properties :

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