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Nickel Alloy ASTM B729 N08020 Alloy20 Seamless Pipe For
Petrochemical
What material is N08020?
Alloy 20 (UNS N08020) is an austenitic, nickel-iron-chromium based
superalloy with additions of Copper and Molybdenum which provide
resistance to hostile environments, pitting, and crevice corrosion.
It is also stabilized with Columbium to minimize carbide
precipitation during welding.
YUHONG Group has been operating stainless steel/duplex/nickel
seamless steel pipe for more than 30 years, and has been
exporting more than 80,000 tons of stainless
steel/duplex/nickel seamless steel pipe every year. Our clients
have covered more than 75 countries.
Alloy 20 is designed to withstand sulfuric acid. Its nickel,
chromium, molybdenum and copper content all provide excellent
general corrosion resistance. Restricted carbon and columbium
stabilization allows the use of welded fabrication in corrosive
environments, usually without post-weld heat treatment. Alloy 20
with 33% nickel is practically immune to chloride stress corrosion
cracking. This alloy is often chosen to solve the SCC problems that
can arise with 316L stainless steel.
Chemical Composition of N08020
| Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 32 - 38 | 0.02 max | 2 - 3 | 1 - 2 | 0.7 max | Bal | 3 - 4 | 0.005 max | 0.02 max | 19 - 21 |
ASTM B729 Alloy 20 Pipe Specifications
| Specifications | ASTM B 729 ASME SB 729 |
| Dimensions | ASTM, ASME and API |
| Size | O.D: 4 to 219mm W. T.: 0.5 to 20mm |
| Specialized in | Large Diameter Size |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Fabricated / LSAW Pipes |
| Form | Round, Square, Rectangular, Hydraulic Etc. |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
N08020 Equivalent Material
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN |
| Alloy 20 | N08020 | 2.4660 | Z2NCUD31-20AZ | NiCr20CuMo |
Physical Properties
Density | Specific Heat | Electrical Resistivity | Thermal Conductivity |
|---|---|---|---|
g/cm³ | J/kg.°C | µΩ·m | W/m.°C |
8.08 | 500 | 1.08 | 12.3 |
Mechanical Properties
| Material Grade | Tensile Strength Rm N/mm²(MPa) min | Yield Strength Rp0.2% N/mm²(MPa) min | Yield Strength Rp 1.0% N/mm²(MPa) min | Elongation (%) | Brinell Hardness HBW 2.5/62.5 max | |
| Alloy 20 2.4660 | Annealed | 550 | 240 | 270 | 40 | 220 |
Applications:
-Tanks, piping, heat exchangers, pumps, valves, and other process
equipment
-Acid cleaning and pickling equipment
-Chemical process piping, reactor vessels
-Bubble caps
-Petrochemical process equipment
-Food and dye production
