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1.4509

Standards

Material No.
1.4509
EN Designation
X2CrTiNb18
AISI/SAE
441
UNS
S43940

Description

1.4509 / AISI 441 is a ferritic chromium stainless steel.

Special properties

Good resistance to stress corrosion cracking.

Chemical Composition

C
%
≤ 0.03
Si
≤ %
1.00
Mn
≤ %
1.00
P
≤ %
0.04
S
≤ %
0.015
Cr
%
17.5-18.5
Ti
≤ %
0.10-0.60
Nb
%
3 x C +0.3-1.00

Mechanical Properties 20°C

Hardness HB 30
≤ HB
200
0.2% Yield strength Rp
≥ N/mm²
200
Tensile strength Rm
N/mm²
420-620
Elongation A5
≥ %
18
Modulus of elasticity
kN/mm²
220

Physical Properties 20°C

Density
g/cm³
7.7
Specific heat capacity
J/kg K
460
Thermal conductivity
W/m K
25
Electrical resistivity
Ω mm²/m
0.6

Suitable welding
filler materials

1.4316; 1.4502

Application

Exhauster, catalyser

Available forms for 1.4509 / AISI 441

Sheets/Plates
Lieferform
Bars
Lieferform
Wire
Lieferform
Tubes/Pipes
Lieferform
Fittings
Lieferform