Austenitic SS Alloy 20 Flat
Alloy 20 flat are popularly known as Carpenter 20, was developed as an austenitic alloy with nickel-iron-chromium to make it resistant to acid attack, especially sulfuric acid. The nickel content in alloy 20 makes it resistant to chloride-ion stress-corrosion cracking.
Chemical Composition
|
GRADE |
Ni |
Cr |
Si |
C |
Mn |
P |
S |
Fe |
Cu |
Mo |
Nb |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
NICKEL ALLOY 20 |
MIN % |
32 |
19 |
– |
– |
– |
– |
3 |
2 |
Properties
Incoloy Alloy 20 flat is an austenitic superalloy with nickel, iron, and chromium with additions of Copper and Molybdenum which make it resistant to hostile environments, pitting, and crevice corrosion. Alloy 20 flat and flat can also be stabilized with Columbium to lessen carbide precipitation during welding.
Mechanical Properties
|
Grade |
Tensile Strength |
Yield Strength |
Elongation |
Hardness, MAX |
|
|---|---|---|---|---|---|
|
[MPA] |
[MPA] |
(% in 50mm) min |
HBW |
HRB |
|
|
Alloy 20 |
551 |
241 |
30 |
217 |
95 |
According to the alloy 20 data flat, the composition of copper and molybdenum in alloy 20 flat make it resistant to reducing environments also Molybdenum makes it resistant to pitting and crevice corrosion. The chromium content makes it resistant in oxidized environments just like nitric acid. Carpenter 20 steel is best resistant with superior mechanical properties and relatively easy fabrication.
Physical Properties
|
Grade |
Density (g/cm3) |
Elastic Modulus (GPa) |
Co-eff of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat (J/Kg.K) |
Electrical Resistivity (nΩ.m) |
|---|---|---|---|---|---|---|
|
25-100°C |
at 100°C |
0-100°C |
||||
|
NICKEL ALLOY 20 |
8.05 |
193 |
14.7 |
12.3 |
500 |
1.08 |
|
MAX % |
38 |
21 |
≤1 |
≤0.07 |
≤2 |
≤0.045 |
≤0.035 |
35 |
4 |
3 |
≤1 |
Incoloy 20 was designed to make it maximum resistant to acid attack and demonstrates superior resistance to cracking due to stress-corrosion in boiling 20% to 40% sulfuric acid and also has superior general corrosion resistance to chloride stress and sulfuric acid corrosion cracking.
Application
Alloy 20 flat is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this super alloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.
Shalco Industries is a manufacturing company of Flat in India and Global Supplier.
