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1.4521

Standards

Material No.
1.4521
EN Designation
X2CrMoTi18-2
AISI/SAE
444
UNS
S44400

Description

1.4521 / AISI 444 is a ferritic chromium stainless steel with molybdenum in addition.

Special properties

Equal corrosion resistance to 1.4401/4404. Excellent resistance to stress corrosion cracking caused by chlorides.

Chemical Composition

C
%
≤ 0.025
Si
≤ %
1.00
Mn
≤ %
1.00
P
≤ %
0.04
S
≤ %
0.015
Cr
%
17.0-20.0
Mo
%
1.80-2.50
N
%
≤ 0.030
Ti
≤ %
4x(C+N)+0.15

Mechanical Properties 20°C

Hardness HB 30
≤ HB
200
0.2% Yield strength Rp
≥ N/mm²
320
Tensile strength Rm
N/mm²
450-650
Elongation A5
≥ %
20
Modulus of elasticity
kN/mm²
220

Physical Properties 20°C

Density
g/cm³
7.7
Specific heat capacity
J/kg K
430
Thermal conductivity
W/m K
23
Electrical resistivity
Ω mm²/m
0.8

Suitable welding
filler materials

1.4430

Application

Cold heading parts, heat exchanger tubes

Available forms for 1.4521 / AISI 444

Sheets/Plates
Lieferform
Tubes/Pipes
Lieferform
Fittings
Lieferform