EN 1.4539 / UNS N08904 / 904L

• Applications

  AISI 904L is a high alloy low carbon austenitic stainless steel with good general corrosion resistance. EN 1.4539 is fully austenitic but is less sensitive to precipitation of sigma phase than conventional austenitic grades with high molybdenum content.

  Areas of applications are process equipment in chemical industry, petrochemical industry, bleaching equipment in the pulp and paper industry, flue gas cleaning, desalination, seawater handling, hydrometallurgy, food and beverage, pharmaceuticals and heat exchangers.

  Heat Treatment – Solution annealing at 1050°C – 1150°C followed by rapid cooling in air or water.

  Weldability – Very good. Low heat input recommended.

• Chemical Composition (Specific for Plates)

  Weight %	C	Mn	P	S	Si	Cr	Ni	Mo	N	Cu
  Min.						19,0	24,0	3,00		1,20
  Max.	0,020	1,20	0,030	0,010	0,70	21,0	26,0	4,50	0,50	2,00

• Reference Standards

  General:

  • PED 2014/68/EU Annex I section 4.3
  • AD2000 W0 (W2/W10)
  • NACE MR0175/ISO 15156-3 and NACE MR0103/ISO 17945

  Plate, sheet and coil:

  • ASTM A240, EN 10028-7, EN 10088-2, EN 10088-4

  Bar and forging:

  • ASTM A276, ASTM A479, ASTM A182, EN 10088-3

  Other products:

  • As per applicable ASTM and/or EN standards

• Mechanical Properties (Typical)

  Yield strength Rp0.2, MPa	Yield strength Rp1.0, MPa	Tensile strength Rm, MPa	Elongation [%]	Hardness [HB]
  ASTM A240	≥ 230		520 – 720	≥ 35	≤ 90
  PLATE CR (COIL)	≥ 240	≥ 270	530 – 730	≥ 35	≤ 90
  PLATE HR (COIL)	≥ 220	≥ 260	530 – 730	≥ 35	≤ 90
  PLATE (QUARTO)	≥ 220	≥ 260	520 – 720	≥ 35	≤ 90

Stocked products and dimensions

• Plate Stock

  MEASUREMENTS	KG/PLATE
  1,5 x 1500 x 3000 mm	54
  2 x 1500 x 3000 mm	72
  2 x 1500 x 6000 mm	144
  2 x 2000 x 6000 mm	192
  3 x 2000 x 1000 mm	48
  3 x 2000 x 4000 mm	192
  3 x 2000 x 6000 mm	288
  4 x 2000 x 1000 mm	64
  4 x 2000 x 4000 mm	256
  4 x 2000 x 6000 mm	384
  5 x 2000 x 1000 mm	80
  5 x 2000 x 4000 mm	320
  5 x 2000 x 6000 mm	480

  MEASUREMENTS	KG/PLATE
  6 x 2000 x 1000 mm	96
  6 x 2000 x 4000 mm	384
  6 x 2000 x 6000 mm	576
  8 x 2000 x 6000 mm	791
  10 x 2000 x 6000 mm	960
  12 x 2000 x 6000 mm	1152
  15 x 2000 x 6000 mm	1440
  20 x 2000 x 6000 mm	1920
  25 x 2000 x 6000 mm	2400
  40 x 2000 x 6000 mm	3840
  50 x 2000 x 6000 mm	4800

• Coil Stock

  1300 MM	1500 MM	2000 MM
  0,5 mm	0,7 mm	3 mm
  	1,5 mm	4 mm
  	2 mm	5 mm
  	3 mm	6 mm
  	4 mm
  	5 mm
  	6 mm