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1.4550

Standards

Material No.
1.4550
EN Designation
X6CrNiNb18-10
AISI/SAE
347
UNS
S34700

Description

1.4550 / AISI 347 is an austenitic chromium-nickel stainless steel with titanium and niobium addition.

Special properties

Good resistance to intergranular corrosion.

Chemical Composition

C
%
≤ 0.08
Si
≤ %
1.00
Mn
≤ %
2.00
P
≤ %
0.045
S
≤ %
0.015
Cr
%
17.0-19.0
Ni
%
9.00-12.0
Nb
%
10 x C

Mechanical Properties 20°C

Hardness HB 30
≤ HB
230
0.2% Yield strength Rp
≥ N/mm²
205
Tensile strength Rm
N/mm²
510-740
Elongation A5
≥ %
40/30
Modulus of elasticity
kN/mm²
200

Physical Properties 20°C

Density
g/cm³
7.9
Specific heat capacity
J/kg K
500
Thermal conductivity
W/m K
15
Electrical resistivity
Ω mm²/m
0.73

Suitable welding
filler materials

1.4316; 1.4551; 1.4576

Application

Foodstuff industry, chemical industry

Available forms for 1.4550 / AISI 347

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