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AISI 904L – Austenitic Stainless Steel

AISI 904L is an austenitic stainless steel that offers a strong resistance to reducing acids such as Sulphuric acid aswell as a good resistance to crevice, pitting, intergranular and stress corrosion. 904L also offers both good weldability and formability with maximum service temperatures reaching 450°C.


X1NiCrMoCu25 20 5
UNS N08904


Element Min Max
C (Carbon) 0.02%
Cr (Chromium) 19% 21%
Cu (Copper) 1.2 2%
Mo (Molybdenum) 4% 5%
Ni (Nickel) 24% 26%
Mechanical Properties Min Max
Ultimate Tensile Strength (UTS) 530 MPa 730 MPa
0.2% Proof Stress 230 MPa
Elongation 35%
Charpy V-Notch Impact = ROom Temp. 100 Joules


Used Widely within petrochemical and paper Industries, . Typical applications include; seawater cooling equipment, Heat exchangers, condenser tubes, pipework etc.

Information is given for illustrative purposes only. Tachart accepts no responsibility for the accuracy of the data contained within or the use of the data by any other party.
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