2.4660

Standards

Mat. No.
2.4660
EU
-
AISI/ASTM
-
UNS
N08020
Other
Nicrofer®3620 Nb
Carpenter®20
Incoloy®alloy 20
Alloy 20
2.4660 / Alloy 20 is an austenitic nickel-iron-chromium alloy with copper and molybdenum additions, low carbon content, and stabilization with niobium.
It is resistant to sulfuric and phosphoric acids. It is also resistant to intergranular corrosion and can withstand pitting and crevice corrosion.

Chemical Composition & Mechanical and Physical Properties

C%
?0.07
Mn%
2.00 max
P%
0.025 max
S%
0.015 max
Si%
1.00 max
Cr%
19.00-21.00
Ni %
32.00-38.00
Mo %
2.00-3.00
Cu %
3.00-4.00
Co %
1.50 max
Fe%
Rest
Nb %
8XC
0.2% Yield Strength Rp N/mm2
240 min
Tensile Strength Rm N/mm2
550 min
Elongation A5 %
30 min
Elastic Modulus kN/mm2
202

Application areas

Phosphorus and sulfuric acid plants.

Specifications

ASTM B473
ASME SA473
NACE MR0175
ONLINE CATALOG