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Alloy 20 Pipe N08020 Alloy Tubing Tubes Pipe






Alloy 20 Pipe ASTM B729 N08020 DIN 17751 2.4660 is a high-corrosion resistant alloy, which shows very good resistance to phosphoric acid, nitric acid, sulfuric acid in chloric media. DIN 17751 2.4660 Alloy 20 is chiefly used in the chemical industry, apparatus engineering and heat exchanger.

Alloy 20 Carpenter 20, is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. This superalloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion.

Carpenter 20 combines excellent corrosion resistance with elevated mechanical properties and relatively easy fabrication. Although originally designed for use in sulfuric acid related industries, Alloy 20 is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this superalloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.

There has long been a debate on whether Carpenter 20 is a stainless steel or a nickel alloy because the nickel content is right on the border of defining it as one way or the other. So, depending on who you talk to this alloy may be referred to as alloy 20 Stainless Steel or as a nickel alloy. Either way it is still great for corrosion resistance.

ASTM B729 Alloy 20 N08020 Alloy Tubing Tubes Pipe have a good resistance properties to pitting and crevice corrosion and good resistance to intercrystalline corrosion, stress corrosion.

What are the characteristics of Alloy 20 N08020?

  • Excellent resistance to chloride stress corrosion cracking
  • Excellent mechanical properties and fabricability
  • Minimal carbide precipitation during welding
  • Excellent in resisting corrosion to hot sulfuric acid
ASME SB 729 N08020 Alloy 20 Pipe Chemical Composition
Alloy
%
C
Mn
P
S
Si
Ni
Cr
Mo
Cu
Nb+Ta
Fe
ASME SB 729 N08020
min.
-
-
-
-
32.00 
19.00 
2.00
3.00 
8×C
Rest 
ASME SB 729 N08020
max.
0.07
2.00
0.045
0.035
1.00
38.00
21.00
3.00
4.00
1.00

DIN 17744 2.4660 Alloy 20 Tube Chemical Composition
Alloy
%
Ni
C
Co
Cr
Cu
Fe
Mn
Mo
Nb+Ta
P
S
Si
DIN 17751 2.4660
min.
32.0
-
-
19.0
3.0
Rest 
2.0
8×C 
-
DIN 17751 2.4660
max.
38.0
0.07
1.5
21.0
4.0
-
2.0
3.0
1.00
0.025
0.015
1.00

ASME SB 729 N08020 Alloy 20 Pipe Mechanical Properties
Alloy
Tensile strength
Rm N/mm²
ksi (MPa)
min
Rp0. 2N/mm²
ksi (MPa)
min
Elongation in 2in. (50.8mm)
or 4D min, %
ASME SB 729 N08020
80 (550)
35 (240)
30.0

DIN 17751 2.4660 Alloy 20 Pipe 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
Brinell Hardness
HBW 2.5/62.5 Approximately
Alloy 20 2.4660 Annealed 550 240 270 40 220 -

Material No. DIN 17744 17750 17751 17752 17753 2.4660
EN symbol (short) NiCr20CuMo
AISI/SAE
UNS ASTM A182 A240 B366 B463 B464 B468 B729 N08020
AFNOR
B.S.
alloy Alloy 20
Registered work's label Nicrofer® 3620Nb Carpenter® 20 and Incoloy® 20

Pipe and Tube

ASTM B 464 N08020 Alloy 20 Pipe
ASME SB 729 N08020 Alloy 20 Tubing
ASME SB 468 N08020 Alloy 20 Tubes
ISO 6207
DIN 17744 17750 17751 17752 17753 2.4660
Standards Desciption
ASTM A182 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
ASTM B366 Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings
ASTM B463 Standard Specification for UNS N08020 Alloy Plate, Sheet, and Strip
ASTM B464 Standard Specification for Welded UNS N08020 Alloy Pipe
ASTM B468 Standard Specification for Welded UNS N08020 Alloy Tubes
ASTM B729 Standard Specification for Seamless UNS N08020, UNS N08026, and UNS N08024 Nickel-Alloy Pipe and Tube
DIN 17744 (2002/09) nickel-forgeable alloy with molybdenum and chrome
DIN 17750 (2002/09) ribbons and sheet metal out of nickel with nickel-wrought alloy properties
DIN 17751 (2002/09) tubes out of nickel with nickel-wrought alloy properties
DIN 17752 (2002/09) rod made from nickel with nickel-wrought alloy properties
DIN 17753 (2002/09) wire out of nickel with nickel-wrought alloy properties
VdTÜV / Werkstoffblatt 432/1 extremely corrosion resistant nickel based alloy, niCr21Mo, material-nr. 2.4858 ribbon, sheet metal
VdTÜV / Werkstoffblatt 432/2 432/2 extremely corrosion resistant nickel based alloy, NiCr 21 Mo, material-nr. 2.4858 seamless pipe
VdTÜV / Werkstoffblatt 432/3 extremely corrosion resistant nickel based alloy, NiCr 21 Mo, material-nr. 2.3858 rod steel, forging

Alloy 20 UNS N08020 Special characteristics
Alloy 20 UNS N08020 Temperature range Alloy 20 UNS N08020 Density g/cm³ Hardness
typically up to 500°C 8.10  

Alloy 20 UNS N08020 Welding filler
Electrode 2.4609
Main fields of application
chemical industry, phosphoric acid, sulphuric acid, hydrofluoric acid, heat exchanger, apparatus engineering, food industry

ASTM A213 / A213M Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM B729 Standard Specification for seamless UNS N08020, UNS N08026, and UNS N08024 nickel alloy pipe and Tube
2.4360 | 2.4600 | 2.4602 | 2.4605 | 2.4610 | 2.4633 | 2.4816 | 2.4851 | 2.4856 | 2.4858 | 2.4889
3.7235 | 3.7035 | 3.7025

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EN 10216-5
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Copper Nickel Alloy Tubing:

UNS N08020 Nickel Alloy 20 Tubing
UNS N02200 Nickel Alloy 200 Tube
UNS N02201 Nickel Alloy 201 Pipe
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N06600 600 2.4816 Nickel Alloy Pipe
N06601 601 2.4851 Nickel Alloy Tubing
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C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
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C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube