Datasheet

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1.4974

Trade name

Alloy N-155

Standards

Material No.
1.4974
EN Designation
X12CrCoNi21-20
AISI/SAE
661
UNS
R30155
Alloy
N-155

Description

Alloy N-155 / 1.4961 is a chromium-nickel-cobalt alloy.

Special properties

Excellent heat resistance up to 800°C. Good ductility. Excellent oxidation resistance.

Chemical Composition

C
%
0.08-0.16
Si
≤ %
1.00
Mn
≤ %
1.00-2.00
P
≤ %
0.04
S
≤ %
0.03
Cr
%
20.0-22.5
Mo
%
2.50-3.50
Ni
%
19.0-21.0
N
%
0.10-0.20
Co
%
18.5-21.5
W
%
2.00-3.00
Nb
%
0.75-1.25

Mechanical Properties 20°C

0.2% Yield strength Rp
≥ N/mm²
345
Tensile strength Rm
N/mm²
690-930
Elongation A5
≥ %
20
Resistant on air up to
°C
980

Physical Properties 20°C

Density
g/cm³
8.25
Specific heat capacity
J/kg K
460
Thermal conductivity
W/m K
12
Electrical resistivity
Ω mm²/m
0.92

Application

Components for chemical and petrochemical industry

Available forms for 1.4974 / AISI 661

Sheets/Plates
Lieferform
Bars
Lieferform
Forged / cast parts
Lieferform
Finished part (drawing)
Lieferform