Alloys 20

Brand name

Nicrofer® 3620 Nb, Carpenter® 20, Incoloy® alloy 20

Trade name

Alloy 20

Standards

Material No.
2.4660
EN Designation
NiCr20CuMo
UNS
N08020
Alloy
20

Description

Alloy 20 / 2.4660 is a low-carbon, niobium stabilized austenitic nickel-iron-chromium alloy with copper and molybdenum.

Special properties

Excellent resistance to sulphuric and phosphoric acids. Good resistance to intergranular corrosion. Good resistance to pitting and crevice corrosion. Very good resistance to chloride-ion induced stress-corrosion cracking.

Chemical Composition

C
%
≤ 0.07
Si
≤ %
1.00
Mn
≤ %
2.00
P
≤ %
0.025
S
≤ %
0.015
Cr
%
19.0-21.0
Mo
%
2.00-3.00
Ni
%
32.0-38.0
Cu
%
3.00-4.00
Co
%
≤ 1.50
Fe
%
Rest
Nb
%
8 x C

Mechanical Properties 20°C

0.2% Yield strength Rp
≥ N/mm²
240
Tensile strength Rm
N/mm²
≥ 550
Elongation A5
≥ %
30
Modulus of elasticity
kN/mm²
202

Physical Properties 20°C

Density
g/cm³
8.1
Specific heat capacity
J/kg K
456
Thermal conductivity
W/m K
11.5
Electrical resistivity
Ω mm²/m
1.07

Suitable welding
filler materials

2.4621; 2.4609

Application

Phosphor and sulphur acids plants

Available forms for 2.4660 / ALLOY 20

Sheets/Plates
Lieferform
Bars
Lieferform
Wire
Lieferform
Tubes/Pipes
Lieferform
Fittings
Lieferform
Forged / cast parts
Lieferform
Finished part (drawing)
Lieferform

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