Stainless Steel 904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack - both pitting / crevice corrosion and stress corrosion cracking. This grade is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures.
Available Forms of Stainless Steel 904L at Rooplaxmi Steels:
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings
• Wire
Characteristics of Stainless Steel 904L:
• Highly durable and highly versatile material
• High resistance to corrosion and heat
Stainless Steel 904L Chemical Composition, %:
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
0.02 max |
2.0 max |
1.0 max |
0.045 max |
0.035 max |
19.0-23.0 |
4.0-5.0 |
23.0-28.0 |
Cu |
N |
1.0-2.0 |
0.10 max |
Application of Stainless Steel 904L:
• Processing plant for sulphuric, phosphoric and acetic acids
• Pulp and paper processing
• Components in gas scrubbing plants
• Seawater cooling equipment
• Oil refinery components
• Wires in electrostatic precipitators
Machining and Fabrication with Stainless Steel 904L:
Stainless Steel 904L is a high purity, low sulphur grade, and as such will not machine as well as other grades optimised for machinability. Stainless Steel 904L can however be machined using standard techniques. Stainless Steel 904L can be successfully welded by all standard methods. Grade 904L stainless steels can be solution heat-treated at 1090 to 1175°C, following by rapid cooling. Thermal treatment is suitable for hardening these grades.
Welding Wire Designations:
USA AWS A5.9 – ER 385
Mechanical Properties of Stainless Steel 904L:
At Room Temperature
Tensile Strength |
490 Mpa min |
Yield |
(0.2 % offset) |
Elongation (in 50 mm) |
35 % min |
Rooplaxmi Steels is a leading Stockholder of Nickel Alloys, Hastelloy, Inconel, Monel, Nickel Copper alloys, Titanium, Cobalt alloys, Duplex, Stainless Steel and other Nickel based alloys in the form of round bars, plate, Sheet, strip, wire, pipe, pipe fittings and flanges.
Quality is our prime concern. We are able to maintain high quality standards through our committed personnel and sound infrastructure. We ensure that finest quality material is used for our products. For ensure the quality of each material, we are providing Materials Test Certificate along with supply. Our team of experts maintain a vigil on the quality of the products.