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1.4749

Standards

Material No.
1.4749
EN Designation
X18CrN28
AISI/SAE
446-1
UNS
S44600

Description

AISI 446-1 / 1.4749 is a heat resistant ferritic chromium stainless steel with niobium in addition.

Special properties

Resistant to scaling up to 1100°C. Resistant to oxidizing sulphuric gases.

Chemical Composition

C
%
0.15-0.20
Si
≤ %
1.00
Mn
≤ %
1.00
P
≤ %
0.04
S
≤ %
0.015
Cr
%
26.0-29.0
N
%
0.15-0.25

Mechanical Properties 20°C

Hardness HB 30
≤ HB
212
0.2% Yield strength Rp
≥ N/mm²
280
Tensile strength Rm
N/mm²
500-700
Elongation A5
≥ %
15
Resistant on air up to
°C
1100
Modulus of elasticity
kN/mm²
200

Physical Properties 20°C

Density
g/cm³
7.7
Specific heat capacity
J/kg K
500
Thermal conductivity
W/m K
17
Electrical resistivity
Ω mm²/m
0.7

Suitable welding
filler materials

1.4773; 1.4820; 1.4842

Application

Industrial furnace construction

Available forms for 1.4749 / AISI 446-1

Sheets/Plates
Lieferform
Tubes/Pipes
Lieferform
Fittings
Lieferform