2.4660
N08020
Alloy 20
Alloy 20 is an iron-base, austenitic alloy with excellent corrosion resistance to a number of different media and proves to be useful in a number of
applications such as flue-gas desulfurization, chemical processing, food processing and storage as well as pharmaceutical applications to name a few. Applications are limited to a maximum temperature of 537°C per ASME. This Alloy was developed for maximum resistance to acid attack, specifically sulfuric acid and fresh water tanks; crude petroleum stills, process vessels and piping; boiler feedwater heaters and heat exchangers; and deaerating heaters.
Mechanical Properties
| Tensile strength: | 550 | N/mm² |
| Yield strength 0,2% : | 240 | ≥ N/mm² |
| Elongation: | 30 | ≥ % |
| Hardness HB30: | 217 | ≤ HB |
Chemical Composition
NICKEL
Ni
32-38% min
CARBON
C
0,07% max
SILICON
Si
1,00% max
MAGNESE
Mn
2,00% max
SULPHUR
S
0,035% max
COPPER
Cu
3-4% max
Molybden
Mo
2-3% max
CHROMIUM
Cr
19-21% max
Heat Treatment
Corrosion testing
Welding
Marking
Certification
920-960°C followed by water quench.
OTHER Nickel Alloys
| Tensile strength: | 675 | N/mm² |
| Yield strength 0,2% : | 270 | ≥ N/mm² |
| Elongation: | 30 | ≥ % |
| Hardness HB30: | – | ≤ HB |
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