About Alloy
904L 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 is non-magnetic, and offers excellent formability, toughness and weldability.
Grade 904L contains high amounts of expensive ingredients, such as molybdenum and nickel. Today, most of the applications that employ grade 904L are replaced by low-cost duplex stainless steel 2205.
Product Form & Standard
Sheet/Plate/Strip
Bar/Rod/Forgings
Tube/Pipe
Fittings
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | min. max. | 0.02 | 2 | 1 | 0.045 | 0.035 | 19- 23 | 4- 5 | 23- 28 | 1- 2 |
Mechanical Properties
| Alloy | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation (%) |
| Alloy 904L Tube | 500-700 | 200 | 40 |
Application
● Wiring in electrostatic precipitators
● Oil refinery components
● Seawater cooling devices
● Gas scrubbing plants
● Pulp and paper processing industries
● Acetic, phosphoric and sulphuric acid proc
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