Stainless Steel Grade 301L (UNS S30103)

Topics Covered

Chemical Composition
Mechanical Properties
Other Designations


Grade 301 is a cheaper alternative to the traditional high-nickel austenitic stainless steels such as grade 304. Grade 301L stainless steel is a low carbon steel which is ideal for improved ductility and when heavy sections are to be welded. Unlike welds in grade 301, grade 301L does not need to be annealed for maximum corrosion resistance.

The following datasheet provides an overview of grade 301L stainless steel.

Chemical Composition

The chemical composition of grade 301L stainless steel is outlined in the following table.

Element Content (%)
Iron, Fe Balance
Chromium, Cr 16-18
Nickel, Ni 6-8
Manganese, Mn 2
Silicon, Si 1
Phosphorous, P 0.045
Carbon, C 0.03
Sulfur, S 0.03
Nitrogen, N 0.2

Mechanical Properties

The mechanical properties of grade 301L stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 550 MPa psi
Yield strength (@strain 0.200%) 220 MPa psi
Elastic modulus 193 GPa 28000 ksi
Elongation at break 45% 45%
Hardness, Brinell 241 241
Hardness, Rockwell B 100 100

Other Designations

Equivalent materials to grade 301L stainless steel are JIS SUS301L and ASME SA240.


Grade 301L stainless steel is widely used pressure vessels and for general applications.

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