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904L Material Property Data Sheet

Do you need custom fasteners created with 904L? Since our inception, Vegas Fastener Manufacturing has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the 904L Bar Stock we have available to meet your needs.


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

Subcategory: Metal; Stainless Steel; T 400 Series Stainless Steel

Key Words: DIN 1.4539; ASTM B-625; ASME SB-625

Component   Wt. %
CMax 0.02 
Cr19 - 23 
Cu1 - 2 
Component   Wt. %
MnMax 2 
Mo4 - 5 
Ni23 - 28 
Component   Wt. %
PMax 0.045 
SMax 0.035 
SiMax 1 

Material Notes:
Iron content above calculated as balance.

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 PropertiesMetricEnglishComments
Density7.9 g/cc0.285 lb/in 

Mechanical Properties
Hardness, Brinell150150 Typical
Hardness, Rockwell B70 - 9070 - 90 79 IsTypical
Tensile Strength, UltimateMin 490 MPaMin 71100 psi 605 MPa Typical; 490 MPa min.
Tensile Strength, YieldMin 220 MPaMin 31900 psi 270 MPa Typical; 220 MPa min.
Elongation at BreakMin 36 %Min 36 % 50% Typical; 36% min.
Reduction of Area55 %55 % 
Modulus of Elasticity190 GPa27600 ksi 

Electrical Properties
Electrical Resistivity9.52e-005 ohm-cm9.52e-005 ohm-cm 
Magnetic PermeabilityMax 1.02Max 1.02 

Thermal Properties
CTE, linear 20C15.3 m/m-C8.5 in/in-F Range 20 - 100C
CTE, linear 500C16.5 m/m-C9.17 in/in-F Range 20 - 400C; 18.2 m/m-C Range 20- 800C
Thermal Conductivity11.5 W/m-K79.8 BTU-in/hr-ft-F at 20C; 12.9 W/M-K at 100C


This information is provided by MatWeb.com, The Online Materials Database and is reprinted with their permission.

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