STAINLESS STEEL
18-8
301
302
STAINLESS STEEL
303
STAINLESS STEEL
304
STAINLESS STEEL
305
DUPLEX STAINLESS
2205
STELLITE
1
6
12
ACETALDEHYDE A to 70°F A to 100% to 200°F A to 100% to 200°F
A to 75% to 239°F
A to 35% to 410°F
A to 70°F - A to 70°F
ACETAMIDE - B at 70°F B at 70°F   -     - A to 70°F
ACETATE ACID, CRUDE B at 70°F B at 70°F B at 70°F      - - -
ACETATE ACID, PURE B 100% at 70°F
AB 20% to 70°
B 100% at 70°F
AB 20% to 70°
B 100% at 70°F
AB 20% to 70°
B 100% at 70°F
AB 20% to 70°F
- -
ACETATE SOLVENTS, CRUDE A to 70°F A to 70°F A to 70°F A to 70°F - -
ACETATE SOLVENTS, PURE A to 70°F A to 70°F A to 70°F A to 70°F
AB to 176°F
- -
ACETIC ACID, CRUDE A conc to 70°F -AB 100% to 70°F
B 20-100% at 70°F
B to 70°F -A conc to 70°F - -
ACETIC ACID, AIR FREE AB glacial at 70°F
A to 100% to 70°F
B/NR 80-100% boiling
B 99.7% at 248°F
NR 70% at 242°F
NR 50-70% boiling
NR 47% at 572°F
AB 20% boiling
NR 10% boiling
C 2.2% boiling
A 1% to boiling
A 20 & 100% to 180°F
AB to 99% at 120°F
AB to 15% at 165°F
N/R 5-100% boiling
BC 50% at 180°F
AB 95-100% to 230°F
A/NR 95-100% 230-300°F
NR 95-100% 300-370°F
A 80-95% TO 255°F
C 80-95% 255-400°F
NR 80-100% at 370°F
A to 95% to 165°F
A to 70% to 210°F
A to 40-70% to 255°F
B to 30-70% 255-345°F
B to 40-50% 255-390°F
B to 30-40% 210-345°F
C to 20-25% 255-345°F
A to 10% to 345°F
AB to 100% to 70°F
AB 100% to 180°F
NR 100% at 400°F
NR 80% at boiling
BC 50% at 180°F
A 8% to 70°F
AB to 100% to boiling

A to 70°F
(6) AB 30% boiling
(1,12) BC 30% boiling
ACETIC ACID, AERATED NR at 70°F - C 100% at 70°F
NR 50-100% 200°F
A 10% at 200°F
-     - -
ACETIC ACID, VAPORS NR 100% at 150°F
C/NR 30% at 150°F
B at 70°F
NR 30-100% at 150°F
C 20% at 150°F
NR 100% at 150-249°F
C/NR 30% at 150°F
B 80-100% boiling
C 20% at 150°F
B at 70°F
NR 100% 150°F
BC 30% at 150°F
AB 100% to 70°F(312)
AB 30% to 130°F(312)
-A to 70°F (6)
ACETIC ANHYDRIDE AB100% to boiling
AB 90% to boiling
NR 30-60% at 180°F
AB 90-100% to boiling
NR 30-60% at 180°F
AB 90-100% to 248°F
AB 100% to 300°F
AB to 100% to 165°F
C/NR 60-90% 165-212°F
B/NR 30-60% 165-200°F
B to 60% 212-275°F
A 50-65% to 240-325°F
A to 40% to 122°F
AB to 58% 210-280°F
AB 58-99% 240-280°F
A 50-65% 280-330°F
NR 90% boiling

AB 90-100% to 70°F
AB 90% to boiling
NR 30-60% at 180°F
A 100% to boiling -
ACETONE A 100% to 134°F A 100% to 212°F
B 90-100% to 212°F
A 100% to 212°F
A to 100% to 200°F
A 22% to 230°F
A to 134°F A to boiling    - A 100% to 70°F
AB to 100% to 257°F 
ACETONITRILE A to 70°F A to 70°F A to 70°F
AB 20% 165-225°F
NR 4% at 192°F
-     - -
ACETOPHENONE A to 70°F A100% to 70°F
A 66% to 302°F
A to 70°F
A to 66% to 302°F
  -   -   -
ACETYL ACETONE A to 70°F - A to 70°F     - - -
ACETYL CHLORIDE BC 70°F to boiling - AC to 70°F
BC 70°F to boiling
-    - -
ACETYLENE A to 70°F A to 400°F A to 400°F A to 70°F   -  A to 70°F
ACETYLENE TETRACHLORIDE -A 100% to 70°F
B 100% to 150°F, dry
- -A 90-100% to 70°F
AB 100% to 600°F
C 99% boiling
-A 100% to 104°F
B 100% 125-212°F
A crude to 12°F,pits
B vapors 185-220°F
-A 100% to 70°F,pits
B 100% to 150°F, dry
B 100% boiling -
ACRYLIC ACID     A to 122°F
A 96% to 77°F
A 45% to 150°F
  -   - -
ACRYLONITRILE
A to 70°F A to 190°F
NR at 257°F
NR hot vapor
A to 190°F
NR at 257°F
NR hot vapor
A to 70°F - -A to 70°F

INTERPRETATION OF DATA

Symbolic Rating Depth of Corrosion Per Surface
A < 0.002 inches per year ( < 0.05 mm/yr.)
B < 0.020 inches per year ( < 0.50 mm/yr.)
C < 0.050 inches per year ( < 1.27 mm/yr.)
NR > 0.050 inches per year or explosive, not recommended.
Q Questionable (probably  unsuitable)
Blank No data

Conversion to milligrams per square decimeter per day (mdd). mdd= inches per year x 696 x density of metal in gm/cm3.

EXAMPLES OF CALLOUTS

A 10-100% to 1500°F < 0.002 in./yr. between 10% & 100%, from 70°F to 1500°F
AB 100% at 212°F < 0.002 to < 0.020 in./yr., 100% concentration, at 212°F.
A/NR 100% at 70°F < 0.002 to > 0.050 in./yr., 100% concentration, at 70°F.
A to 70°F < 0.002 in./yr., 100% concentration, or saturated, or concentrated solution, any temperature to 70°F.
A to 100% to 212°F < 0.002 in./yr., any concentration to 100%, any temperature to 212°F.
B 20-50% 70-140°F < 0.020 in./yr., any concentration between 20% & 50%, any temperature between 70°F & 140°F.
A/NR at 70°F < 0.002 to > 0.050 in./yr., 100% concentration, or saturated, or concentrated
solution, at 70°F. Just a few degrees of temperature difference, or percentage
points of concentration, can greatly effect the corrosion rate. Combinations rated A/NR are critical regarding concentration or temperature.
A aqueous solution to 70°F <.002 in./yr. to 70°F, a solution usually 10% or less concentration.
A dilute to 70°F <.002 in./yr. to 70°F, a very weak solution usually 1% or less
concentration.

COMBINATION CALLOUT

A 100% to 70°F
NR to 100% at 70°F
Indicates that a 100% concentration is not particularly corrosive (< 0.002 in./yr.) at 70°F, but any concentration less than 100% is very corrosive.

All metals & alloys are to be considered as annealed & stress relieved except as noted otherwise.
Note that when boiling is indicated, the boiling temperature varies with the concentration of the corrodent.

* Entries prefaced with an asterisk are not specifically tested but are manufacturers' estimates based on performance with similar classes of chemicals.

Maximum use temperatures and/or concentrations listed are not necessarily upper limits of usability but are limits of data available at time of printing.


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