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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.

Hydrochloric acid, HCI
Conc. % 0.1 0.1 0.2 0.2 0.2 0.2 0.5 0.5 0.5 1
Temp. °C 20 -50 100 =BP 20 50 100 =BP 130 20 50 100 =BP 20
Grade or type of alloy:
Carbon steel 1 2 1 2 2 2 2 2
13 Cr 1p 1p 1p 1p 2 2 2 2
Sandvik 1802 p p p p p p 2 p
Sandvik 3R12 1p 1ps 1p 1p 1p 1p 2 1p
Sandvik 3R60 0p 0ps 0p 0p 0p 0p 2 0p
18Cr13Ni3Mo 1)
0p 0ps 0p 0p 0p 0p 2 0p
17Cr14Ni4Mo 2)
0p 0ps 0p 0p 0p 0p 2 0p
Sandvik 2RK65 ('904L') 0p 0ps 0p 0p 0p 0p 2 0p
Sanicro 28 0ND 0ND 0ND 0ND 0ND
254 SMO 0ND 0ND 0ND 0ND 0ND 1ND 0ND
654 SMO 0ND 0ND 0ND 0ND 0ND
Sandvik SAF 2304 0ND 0ND 0ND 0 2 0ND
Sandvik SAF 2205 0 0ND 0ND 0ND 0ND 0ND 0ND
Sandvik SAF 2507 0ND 0ND
Titanium (Cp Ti) 0 0 0 0 0p 0 0 1 0

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

Hydrochloric acid
Conc. % 1 1 1 1 2 2 2 3 3 3 3 3
Temp. °C 50 60 80 100=BP 20 60 100=BP 20 60 70 80 100
Grade or type of alloy:
Carbon steel 2 2 2 2 2 2 2 2 2 2 2 2
13 Cr 2 2 2 2 2 2 2 2 2 2 2 2
Sandvik 1802 2 2 2 2 2 2 2 2 2 2 2 2
Sandvik 3R12 2 2 2 2 2 2 2 2 2 2 2 2
Sandvik 3R60 1p 2 2 2 1p 2 2 1p 2 2 2 2
18Cr13Ni3Mo 1)
0p 1p 1ps 2 1p 2 2 1p 2 2 2 2
17Cr14Ni4Mo 2)
0p 1p 1ps 2 1p 2 2 1p 2 2 2 2
Sandvik 2RK65 ('904L') 0p 1p 1ps 2 0p 1p 2 0p 1p 1p 2 2
Sanicro 28 0ND 0ND 0ND 2 0ND 1ND 1ND 2 2 2 2
254 SMO 0ND 0ND 0ND 2 0ND 2 0ND 2 2 2
654 SMO 0ND 0ND 0ND 1ND 0ND 0ND 2 0ND 0ND 2 2 2
Sandvik SAF 2304 1 1ND 2 2 0ND 2 2 2
Sandvik SAF 2205 0ND 0ND 1ND 2 1ND 2 2
Sandvik SAF 2507 0ND 0ND 0ND 0 0ND 0ND 2 0 2 2 2 2
Titanium (Cp Ti) 0 0 0 1 0 0 2 0 0 1 1 2
Sandvik SAF 2906 0 0 0 2p 0 2 2
Sandvik SAF 2707 HD 0 0 0 2p 0 2
Sandvik SAF 3207 HD 0 0 0 2ND 0 1 2p

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

Hydrochloric acid
Conc. % 5 5 5 5 5 5 8 10 10 20 30-37
Temp. °C 20 35 50 60 70 102=BP 60 20-35 60 20-35 20
Grade or type of alloy:
Carbon steel 2 2 2 2 2 2 2 2 2 2 2
13 Cr 2 2 2 2 2 2 2 2 2 2 2
Sandvik 1802 2 2 2 2 2 2 2 2 2 2 2
Sandvik 3R12 2 2 2 2 2 2 2 2 2 2 2
Sandvik 3R60 2 2 2 2 2 2 2 2 2 2 2
18Cr13Ni3Mo 1)
2 2 2 2 2 2 2 2 2 2 2
17Cr14Ni4Mo 2)
2 2 2 2 2 2 2 2 2 2 2
Sandvik 2RK65 ('904L') 1 2 2 2 2 2 2 2 2 2 2
Sanicro 28 1ND 1ND 2 2 2 2 1ND 1ND
254 SMO 1ND 2 2 2 2 2
654 SMO 0ND 0ND 0ND 2 2 2 2
Sandvik SAF 2304
Sandvik SAF 2205
Sandvik SAF 2507 2 2 2 2 2 2
Titanium (Cp Ti) 1 1 1 1 1 2 1 1 2 2 2

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