Alloy 20 Tubing
Alloy 20 is an austenitic, nickel-iron-chromium-molybdenum alloy with the addition of copper. This combination makes it preferable in applications involving sulfuric, phosphoric, and nitric acids. The chromium and molybdenum content provide good pitting and crevice corrosion resistance. This...
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Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of alloy 20 tubing in China. With abundant experience, we warmly welcome you to wholesale customized alloy 20 tubing from our factory. For price consultation, contact us.
Alloy 20 is an austenitic, nickel-iron-chromium-molybdenum alloy with the addition of copper. This combination makes it preferable in applications involving sulfuric, phosphoric, and nitric acids. The chromium and molybdenum content provide good pitting and crevice corrosion resistance. This grade exhibits exceptional resistance to stress corrosion cracking (SCC) induced by chlorides. Alloy 20 can be utilized in a wide variety of chemical process environments and has good performance in most acids, alkalines, salts, and seawater.
Chemical Requirements
Alloy 20 (UNS N08020)
Composition %
|
C |
Mn |
P |
S |
Si |
Ni Nickel |
Cr Chromium |
Mo |
Cu |
Nb + Ta Niobium + Tantalum |
Fe Iron |
|
0.07 max |
2.00 max |
0.045 max |
0.035 max |
1.0 max |
32.00–38.00 |
19.00–21.00 |
2.0–3.0 |
3.0–4.0 |
(8.0xC) - 1.0 max |
35.0 max |
Dimensional Tolerances
|
OD |
OD Tolerance |
Wall Tolerance |
|
.250” |
± .005” |
± 15% |
|
.375” |
± .005” |
± 15% |
|
.500” |
± .005” |
± 15% |
Mechanical Properties
|
Yield Strength: |
35 ksi min |
|
Tensile Strength: |
80 ksi min |
|
Elongation (min 2"): |
30% |
Fabrication
The chemical composition of alloy 20 allows excellent formability for bending and flaring, and the addition of Niobium provides minimal carbide precipitation during welding.
Industry Applications
Chemical Process
Alloy 20 has a higher nickel content which, combined with chromium, molybdenum and copper, makes it the austenitic stainless steel of choice for chemical processes involving higher concentrations of sulfuric acids.
Fabrication
Food & Beverage
Oil & Gas
Power Generation
Pulp & Paper
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