904L Technical Information

904L Chemical Composition:

Elements Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Molybdenum Nitrogen Copper
Composition by % 0.02 max 2.00 0.045 0.035 1.00 19.0 – 23.0 23.0 – 28.0 4.0 – 5.0 0.1 1.0 – 2.0
* Chemistry conforms to requirement of ASTM A276 UNS N08904 (SS 904L)

904L Mechanical Properties:

Tensile Strength ( min ) 490 Mpa
Yield Strength ( min ) 220 Mpa
Elongation ( min ) 35 %
Reduction of Area ( min ) -
Hardness -

904L Physical Properties:

Elastic Modulus 190 GPa
Mean Co-Efficient of Expansion (0-100ºC) 15 µm/m/ºC
Thermal Conductivity (At 20ºC) 11.5 W/m.K
Specific Heat (0-100ºC) 500 J/Kg.K
Electric Resistivity 952 nΩ.m

904L Density:

Kg/m3 7900
Lb/ft3 493
904L Melting Point

904L Stainless Steel has a melting range between 1300 – 1390 ºC (2372 – 2534º F)

904L Heat Treatment

904L has austenitic stainless steel chemistry and can be strengthened by solution annealing at 1090 to 1175ºC, followed by rapid water quenching. 904L can be hardened using heat treatment.

904L Machining

Grade 904L stainless steels are high purity steels with low sulfur content. They can be machined using any standard methods. These grades can be readily bent to a small radius under cold conditions. Although subsequent annealing is not required in most cases, it should be carried out when the fabrication is performed under severe stress corrosion cracking conditions.

904L Substitute Grades:

316L With Lower corrosion resistance and cost effective
6Mo Alloys With higher resistance to pitting and crevice corrosion
Duplex 2205 With similar corrosion resistance, higher mechanical strength and lower cost but not suitable for temperature above 300ºC

904L Equivalent Grade Designation:

AISI UNS DIN / EN / Werkstoff Number Euronorm / DIN Name Brand Name
904L N08904 1.4539 X1-Ni-Cr-Mo-Cu-25-20-5 URANUS® B6
904L Available Product Forms:
  • Seamless Pipes and Tubes
  • Welded Pipes and Tubes
  • LSAW Pipes
  • Butt Weld Pipe Fittings
  • Socket Weld Pipe Fittings
  • Threaded Pipe Fittings
  • Forged Pipe Fittings
  • Tube Fittings
  • Forged Flanges
  • Plates
  • Bars (Round, Square, Hexagon, Flat Rectangular)
  • Wires
  • Welding Tig Wire & Electrode
  • Wire Mesh
  • Perforated Sheets & Plates

904L Product Specifications:

Seamless / Welded Pipe ASTM A312 / ASME SA312
Seamless / Welded Tubing ASTM A269 / ASME SA269
Bar / Rod ASTM A276-A479 / ASME SA276-SA479
Forging ASTM A182 / ASME SA182
Sheet / Plate ASTM A240 / ASME SA240
Welding Consumable -