Type 304L is a lower carbon variant of Grade 304 – the steel can be welded without the resulting issue of carbon precipitation (precipitation of chromium carbide as heat is applied during the welding process which depletes the chromium element of the steel thus reducing its anti-corrosive/oxidation effectiveness).
As a result, Type 304L stainless steel is a sort after material for use in severely corrosive conditions. Weld annealing is only necessary in applications where stress loads are excessive.
This steel Grade is found in a variety of commercial sectors, particularly in the chemical industry.
Benefits of using 304L Stainless Steel
Low carbon content eliminates carbon precipitation in the welding process
Can be used in severe corrosive environments
Weld annealing only required in high stress applications
Very similar to Type 304
304 & 304L plate and pipes have similar properties and in certain cases are stocked with Dual Certification, where it is concluded that each item has properties and a composition which comply with both steel types. Grade 304H cannot be included in this equation due to the steel's higher carbon content which is intended for use in elevated temperature applications.
Chemical Composition
UNS No
Grade
C
Si
Mn
P
S
Cr
Mo
Ni
N
S30403
304L
0.030
0.75
2.00
0.045
0.030
18.00/20.00
–
8.00/12.00
0.10
Mechanical Properties
UNS No
Grade
Proof Stress 0.2% (MPa)
Tensile Strength (MPa)
Elongation A5(%)
Hardness Max
HB
HRB
S30403
304L
170
485
40
201
92
We stock 304L stainless steel and can globally supply this material to you – to find out more or to receive a competitive quotation please contact us.
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