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ATI Allegheny Ludlum Stainless Steel AL 904L™ Alloy (UNS N08904)

Category Metal , Ferrous Metal , Austenitic , Stainless Steel
Manufacturer ATI Allegheny Ludlum
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF ATI Allegheny Ludlum Stainless Steel AL 904L™ Alloy (UNS N08904).pdf
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Material Notes:
Allegheny Ludlum AL 904 L™ Alloy (UNS N08904) is an austenitic stainless steel alloy designed for a middles to high level of corrosion resistance. The alloy is produced to low carbon levels for use in the welded condition as in welded vessels and other large and complex fabrications.The high nickel (25%) and molybdenum (4.5%) contents of the AL 904L alloy provide good resistance to chloride stress corrosion cracking, although not total resistance as judged by the extremely severe laboratory test, boiling magnesium chloride.The N08904 alloy has been incorporated in ASTM and ASME specifications, and is widely and readily available in a variety of product forms, welding electrodes, and fittings. The AL 904L Alloy has performed well in a variety of service environments such as utility scrubbers, acid and fertilizer production. Information provided by Allegheny Ludlum Corporation.
Physical Properties Metric English Comments
Density 7.90 g/cc
0.285 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 150
150
Typical
Hardness, Rockwell B 70 - 90
70 - 90
79 Is Typical
Tensile Strength, Ultimate >= 490 MPa
>= 71100 psi
Minimum
605 MPa
87700 psi
Typical
Tensile Strength, Yield >= 220 MPa
>= 31900 psi
Minimum
270 MPa
39200 psi
Typical
Elongation at Break >= 36 %
>= 36 %
Minimum
50 %
50 %
Typical
Reduction of Area 55 %
55 %
Modulus of Elasticity 190 GPa
27600 ksi
Thermal Properties Metric English Comments
CTE, linear 15.3 µm/m-°C

@Temperature 20.0 - 100 °C
8.50 µin/in-°F

@Temperature 68.0 - 212 °F
16.5 µm/m-°C

@Temperature 20.0 - 400 °C
9.17 µin/in-°F

@Temperature 68.0 - 752 °F
18.2 µm/m-°C

@Temperature 20.0 - 800 °C
10.1 µin/in-°F

@Temperature 68.0 - 1470 °F
Specific Heat Capacity 0.460 J/g-°C
0.110 BTU/lb-°F
typical of N08904
Thermal Conductivity 11.5 W/m-K

@Temperature 20.0 °C
79.8 BTU-in/hr-ft²-°F

@Temperature 68.0 °F
12.9 W/m-K

@Temperature 100 °C
89.5 BTU-in/hr-ft²-°F

@Temperature 212 °F
Component Elements Properties Metric English Comments
Carbon, C <= 0.020 %
<= 0.020 %
Chromium, Cr 19 - 23 %
19 - 23 %
Copper, Cu 1.0 - 2.0 %
1.0 - 2.0 %
Iron, Fe 47 %
47 %
as balance
Manganese, Mn <= 2.0 %
<= 2.0 %
Molybdenum, Mo 4.0 - 5.0 %
4.0 - 5.0 %
Nickel, Ni 23 - 28 %
23 - 28 %
Phosphorous, P <= 0.045 %
<= 0.045 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.035 %
<= 0.035 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000952 ohm-cm
0.0000952 ohm-cm
Magnetic Permeability <= 1.02
<= 1.02
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