304L UNS S30403 304L grade with 0.030% maximum carbon is
similar to the 304 grade, but with much enhanced
performance in the sensitization range. Due to its
superior resistance to intergranular corrosion following
stress relieving or welding, Type 304L is broader
in application versatility. The extra-low carbon
304L is required when welding joins heavy sections
or an aggressive corrosion environment exists and
post-weld annealing is not possible. 304L will become
sensitized if exposed for long periods of exposure
to service temperatures of 800?-1600?F.
Type 304L is used where welding is required but
the carbide precipitation tendency of Type 304 will
impair that alloys corrosion resistance.
chemical composition limits
(%)
Carbon
C
Manganese
Mn
Phosphorus
P
Sulfur
S
Silicon
Si
Chromium
Cr
Nickel
Ni
Nitrogen
N
0.03
2.00
0.045
0.030
1.00
18.00-20.00
8.00-12.00
-
Representative mechanical property
condition
tensile strength
yield strength
elongation
rockwell
KSi
MPa
ksi
mpa
in
2 inches %
Annealed
70
(485)
25
(170)
40
B-88
max.
*Minimum
Chemical composition is percent maximum unless
shown as a range or a minimum.
Information presented as a guide for reference
purposes only and is not intended for product
design or application.
