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1.4438

Standards

Material No.
1.4438
EN Designation
X2CrNiMo18-15-4
AISI/SAE
317 L
UNS
S31700

Description

1.4438 / AISI 317 L is an austenitic chromium-nickel-molybdenum stainless steel.

Special properties

Better corrosion resistance than AISI 316L, specially in high-corrosive environments with chlorides and halides.

Chemical Composition

C
%
≤ 0.030
Si
≤ %
1.00
Mn
≤ %
2.00
P
≤ %
0.045
S
≤ %
0.015
Cr
%
17.5-19.5
Mo
%
3.00-4.00
Ni
%
13.0-16.0
N
%
≤ 0.11

Mechanical Properties 20°C

Hardness HB 30
≤ HB
215
0.2% Yield strength Rp
≥ N/mm²
200
Tensile strength Rm
N/mm²
500-700
Elongation A5
≥ %
40/30
Modulus of elasticity
kN/mm²
200

Physical Properties 20°C

Density
g/cm³
8
Specific heat capacity
J/kg K
500
Thermal conductivity
W/m K
14
Electrical resistivity
Ω mm²/m
0.85

Suitable welding
filler materials

1.4440; 1.4438

Application

Cellulose industry, chemical industry

Available forms for 1.4438 / AISI 317 L

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