904L / N08904 / 1.4539

Austenitic Stainless Steel

Corresponding Standards:
EN/DIN 1.4539
X1NiCrMoCu25-20-5
AFNOR Z2CNDU25.20
UNS N08904
AISI 904L / F904L
BS 904S13
SS 2562
OTHER ASTM A182
ASTM A262
ASTM A479
ASTM B649 / ASME SB649
DIN 17440
EN10088-3
EN10272
NACE MR01-75 / ISO 15156
SEW 400-VdTÜV421
BRANDS URANUS B6™
VLX904™
AL-904L™
CRONIFER 1925™
2RK65™
Similar to:
AL-6XN® / AL-6XN Plus®
UNS NO8367
254SMO® / 6Mo® / 6 Moly
1.4529
904L Round Bar - Size Range (Ex-Stock):
Forged/Rolled, Solution-annealed, Machined bars cut to length if required. Full mill Certs with goods.
dia. Metric dia. Imperial  
6.0 0.236 Peeled/Machined
8.0 0.315 Peeled/Machined
10.0 0.394 Peeled/Machined
12.0 0.472 Peeled/Machined
16.0 0.630 Peeled/Machined
20.0 0.788 Peeled/Machined
25.0 0.985 Peeled/Machined
30.0 1.182 Peeled/Machined
35.0 1.378 Peeled/Machined
40.0 1.575 Peeled/Machined
45.0 1.772 Peeled/Machined
50.0 1.969 Peeled/Machined
55.0 2.166 Peeled/Machined
60.0 2.363 Peeled/Machined
65.0 2.559 Peeled/Machined
70.0 2.756 Peeled/Machined
80.0 3.150 Peeled/Machined
90.0 3.544 Peeled/Machined
100.0 3.937 Peeled/Machined
110.0 4.331 Peeled/Machined
120.0 4.725 Peeled/Machined
130.0 5.119 Peeled/Machined
140.0 5.512 Peeled/Machined
150.0 5.906 Peeled/Machined
160.0 6.300 Peeled/Machined
170.0 6.693 Peeled/Machined
180.0 7.087 Peeled/Machined
190.0 7.481 Peeled/Machined
200.0 7.874 Peeled/Machined
210.0 8.268 Peeled/Machined
Note: Non stock items are available ex-mill, in short lead times. Please contact us with your enquiry.
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Grade 904L / 1.4539 / UNS N08904

Grade 904L / X1NiCrMoCu25-20-5 / Z2CNDU25.20 / F904L / 904S13 / SS 2562 to ASTM B649 / ASME SB649 & NACE MR01-75 / ISO 15156 (Brands - URANUS B6™ / VLX904™ / AL-904L™ / CRONIFER 1925™ / 2RK65™) stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel is added with copper to improve its resistance to strong reducing acids, such as sulphuric acid. The steel is also resistant to stress corrosion cracking and crevice corrosion. Grade 904L 1.4539 UNS N08904 X1NiCrMoCu25-20-5 904S13 is non-magnetic, and offers excellent formability, toughness and weld ability. Corrosion Resistance Grade 904L / X1NiCrMoCu25-20-5 / Z2CNDU25.20 / F904L / 904S13 / SS 2562 to ASTM B649 / ASME SB649 & NACE MR01-75 / ISO 15156 (Brands - URANUS B6™ / VLX904™ / AL-904L™ / CRONIFER 1925™ / 2RK65™) stainless steels have excellent resistance to warm seawater and chloride attack. The high resistance of grade 904L / X1NiCrMoCu25-20-5 / Z2CNDU25.20 / 904S13 / SS 2562 / NACE MR01-75 / ISO 15156 against stress corrosion cracking is due to the presence of high amounts of nickel in its composition. Moreover, the addition of copper to these grades develops resistance to sulphuric acid and other reducing agents in both aggressive and mild conditions. Applications some of the major applications of grade 904L stainless steels include: Wiring in electrostatic precipitators / Oil refinery components / Seawater cooling devices / Gas scrubbing plants / Pulp and paper processing industries / Phosphoric and sulphuric acid processing plants / Production and transport of sulphuric acid / Metal pickling in sulphuric acid / Production and concentration of phosphoric acid / Use in seawater, brackish water, condensers, heat exchangers / Paper and allied industries / Gas washing / Chemical and pharmaceutical industries. DESCRIPTION Grade 904L / X1NiCrMoCu25-20-5 / Z2CNDU25.20 / F904L / 904S13 / SS 2562 to ASTM B649 / ASME SB649 & NACE MR01-75 / ISO 15156 (Brands - URANUS B6™ / VLX904™ / AL-904L™ / CRONIFER 1925™ / 2RK65™) is a high-alloy austenitic stainless steel with low carbon content. The grade is intended for use under severe corrosive conditions. It has been application proved over many years and was originally developed to resist corrosion in dilute sulphuric acid. It is standardized and approved for pressure vessel use in several countries. Structurally, 904L is fully austenitic and is less sensitive to precipitation ferrite and sigma phases than conventional austenitic grades with high molybdenum content. Characteristically, due to the combination of relatively high contents of chromium, nickel, molybdenum and copper 904L has good resistance to general corrosion, particularly in sulphuric and phosphoric conditions. DESIGN FEATURES Good resistance to pitting and crevice corrosion / Very good resistance to stress corrosion cracking / Good resistance to intergranular corrosion / Good formability and weld ability / Maximum service temperatures of 450 deg.C. (824 deg.F). Most common fusion and resistance methods may be employed. For maximum corrosion resistance, it is recommended to use filler metals of equal or higher alloy content. Hot work should proceed after uniform heating to 2000-2200 F. Do not work the material at less than 1800 F. full annealing should follow any hot work to retain maximum ductility and corrosion resistance. Grade 904L / X1NiCrMoCu25-20-5 / Z2CNDU25.20 / F904L / 904S13 / SS 2562 to ASTM B649 / ASME SB649 & NACE MR01-75 / ISO 15156 (Brands - URANUS B6™ / VLX904™ / AL-904L™ / CRONIFER 1925™ / 2RK65™) Although higher forces are required, 904L will respond in a similar fashion to other austenitic stainless steels like 304, 316 or 317. Most common operations can be successfully performed. 1920-1990 F (1050-1090 C), rapid cooling. This alloy does not respond to heat treatment. It may only be hardened by cold reduction. Excellent stability against pitting corrosion, stress corrosion and intergranular corrosion