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Alloy 20 Couplings in sizes 2” & 3” |
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Alloy
20 (also called Carpenter 20Cb-3®) is an austenitic stainless
steel possessing excellent resistance to hot sulfuric acid
and many other aggressive environments which would readily
attack Type 316 stainless. This alloy exhibits superior
resistance to stress-corrosion cracking in boiling 20 to
40% sulfuric acid.
20Cb-3 stainless is also stabilized to limit inter-granular
attack, even in the sensitized condition. Corrosion tests
on annealed and sensitized material conducted in the Ferric
Sulfate - 50% Sulfuric Acid Test resulted in rates of 0.002
inches per month maximum.
This material has found wide use in all phases of the chemical
and allied industries. It has been used extensively in the
processing of synthetic rubber, high-octane gasoline, solvents,
explosives, plastics, synthetic fibers, heavy chemicals,
organic chemicals, pharmaceuticals, and agrichemicals.
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Some of
the areas of use for Alloy 20 are:
Fans
Mixing tanks
Agitators
Distillation towers
Heat
exchangers
Process piping
Bubble caps
Metal cleaning
& pickling
tanks spray Pickling equipment
Pump shafts and rods valve
stems
Bolts
Nuts
Washers
Tie rods
Continuous-line pickling equipment
Racks
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| Important Note:
The following 5-level rating scale is intended for comparative purposes only. Corrosion testing is recommended; factors which affect corrosion resistance include temperature, concentration, pH, impurities, aeration, velocity, crevices, deposits, metallurgical condition, stress, surface finish and dissimilar metal contact. |
| Nitric Acid |
Good |
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Sulfuric Acid |
Excellent |
| Phosphoric Acid |
Good |
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Acetic Acid |
Good |
| Sodium Hydroxide |
Good |
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Salt Spray (NaCl) |
Excellent |
| Sea Water |
Moderate |
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Sour Oil/Gas |
Good |
| Humidity |
Excellent |
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| Please see dimensions, weights and complete
technical specifications for Alloy 20 couplings in our
Catalog on
pages 9, 11, 12, and 13. |
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