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These corrosion data are mainly based on results of general corrosion laboratory tests, carried out with pure chemicals and water solutions nearly saturated with air (the corrosion rate can be quite different if the solution is free from oxygen).

All concentrations are given in weight-% and the solvent is water if nothing else is shown. The corrosion data apply to annealed materials with normal microstructure and clean surfaces, throughout.

Nitric acid, HNO3
Conc. % 0.5 1 1 1 5 5 5 5 5 10 10 10 10 20 20 20
Temp. °C 250 20 50 100 =BP 20 50 100 =BP 150 290 20 50 101 =BP 145 20 50 103 =BP
Grade or type of alloy:
Carbon steel 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
13 Cr 0 1 2 0 1 2 2 2 0 1 2 2 0 1 2
Sandvik 1802 0 0 0 0 0 0 2 2 0 0 0 2 0 0 0
Sandvik 3R12 0 0 0 0 0 0 0 1 2 0 0 0 2 0 0 0
Sandvik 3R60 0 0 0 0 0 0 0 1 2 0 0 0 2 0 0 0
18Cr13Ni3Mo 1)
0 0 0 0 0 0 1 2 0 0 0 2 0 0 0
17Cr14Ni4Mo 2)
0 0 0 0 0 0 1 2 0 0 0 2 0 0 0
Sandvik 2RK65 ('904L') 0 0 0 0 0 0 0 1 2 0 0 0 2 0 0 0
Sanicro 28 0 0 0 0 0 0 0 0 0 0
254 SMO 0 0 0 0 0 0 0 0 0
654 SMO 0 0 0 0 0 0 0 0 0
Sandvik SAF 2304 0 0 0 0 0 0 0 0 0
Sandvik SAF 2205 0 0 0 0 0 0 0 0 0
Sandvik SAF 2507 0 0 0 0 0 0 0 0 0
Titanium (CP Ti) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68

Nitric acid, HNO3
Conc. % 20 30 30 30 30 50 50 50 50 50 60 60 60 60 65 65
Temp. °C 120 20 70 106 =BP 120 20 70 90 110 117 =BP 20 60 100 121 =BP 20 60
Grade or type of alloy:
Carbon steel 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
13 Cr 2 0 1 2 2 0 1 1ig 2 2 0 1 2 2 0 1
Sandvik 1802 2 0 0 1 2 0 0 1ig 1ig 2 0 0 1ig 2 0 0
Sandvik 3R12 1 0 0 0 1 0 0 0ig 1ig 1ig 0 0 1ig 1ig 0 0
Sandvik 3R60 1 0 0 0 1 0 0 0ig 1ig 1ig 0 0 1ig 1ig 0 0
18Cr13Ni3Mo 1)
1 0 0 0 1 0 0 0ig 1ig 1ig 0 0 1ig 1ig 0 0
17Cr14Ni4Mo 2)
1 0 0 0 1 0 0 0ig 1ig 1ig 0 0 1ig 1ig 0 0
Sandvik 2RK65 ('904L') 1 0 0 0 1 0 0 0ig 0ig 1ig 0 0 0ig 1ig 0 0
Sanicro 28 0 0 0 0 0 0ND 0ND 0ND 0 0
254 SMO 1ig 0 0
654 SMO
Sandvik SAF 2304 0ig 0 0
Sandvik SAF 2205 0 0 0 0 0 0ND 0ND 0ND 0 0
Sandvik SAF 2507 0 0 0 0 0 0ND 0ND 0ND 0 0
Titanium (CP Ti) 1 0 0 1 1 0 0 1 1 1 0 0 1 0 0 0
Sandvik SAF 2906 0
Sandvik SAF 2707 HD 0
Sandvik SAF 3207 HD

1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68

Nitric acid, HNO3
Conc. % 65 65 65 65 80 80 80 80 90 90 90 94 97 99 99 99
Temp. °C 70 90 121 =BP 175 20 50 80 106 =BP 20 80 94 =BP 30 25 25 40 84 =BP
Grade or type of alloy:
Carbon steel 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
13 Cr 1 1ig 2 0 1 2 2 0 2 2 2 2 2 2 2
Sandvik 1802 0 1ig 2 0 0 1ig 2 0 2 2 0 0 1 2 2
Sandvik 3R12 0 1ig 1ig 0 0 1ig 2 0 2 2 0 0 1 2 2
Sandvik 3R60 0 1ig 1ig 0 0 1ig 1ig 0 2 2 0 0 1 2 2
18Cr13Ni3Mo 1)
0 1ig 1ig 0 0 1ig 1ig 0 2 2 0 1 2 2
17Cr14Ni4Mo 2)
0 1ig 1ig 0 0 1ig 1ig 0 2 2 0 1 1 2 2
Sandvik 2RK65 ('904L') 0 0ig 1ig 0 0 1ig 1ig 0 1ig 2 0 1 2 2
Sanicro 28 0 0ig 0ig
254 SMO 0 0ig 1ig
654 SMO 1ig
Sandvik SAF 2304 0 0ig 1ig 1 1
Sandvik SAF 2205 0 0ig 1ig
Sandvik SAF 2507 0 0ND 1ig
Titanium (CP Ti) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Sandvik SAF 2906 0
Sandvik SAF 2707 HD 0
Sandvik SAF 3207 HD 0

1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68

Nitric acid, HNO3
Temp. °C 25 40
Grade or type of alloy:
Carbon steel
13 Cr
Sandvik 1802
Sandvik 3R12 0 1
Sandvik 3R60 1 1
18Cr13Ni3Mo 1)
17Cr14Ni4Mo 2)
Sandvik 2RK65 ('904L')
Sanicro 28
254 SMO
654 SMO
Sandvik SAF 2304
Sandvik SAF 2205
Sandvik SAF 2507
Titanium (CP Ti) 2 2

1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68