MATERIAL DESCRIPTION

AISI 904L is a high nickel – molybdenum austenitic stainless steel with a very high corrosion resistance specifically for handling medium concentrated sulfuric acid solutions. Good weldability and excellent formability.

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

Weight % C MN CR NI MO N CU S P
MIN. 19,00 23,00 4,00 1,00
MAX.  0,06  2,00 28,00 5,00 0,10 2,00 0,035 0,045

Approvals: ASTM A240, ASTM A276, ASTM A479, ASTM A480, EN 10088.

Mechanical Properties

Yield strength
RP0.2, MPA
Tensile strength
RM, MPA
Elongation
[%]
Hardness
[HB]
Impact, Charpy-V, 20ºC
[J]
ASTM A240  ≥ 220  ≥ 490  ≥ 35  ≤ 90  60

PLATE STOCK

MEASUREMENTS KG/PLATE
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
30 x 2000 x 6000 mm 2880

COIL STOCK

1500 MM 2000 MM
2 mm 3 mm
4 mm
5 mm
6 mm