Decoding S235J0 and DX51: Unraveling the Variations in Steel Types

mechanical properties:

– S235J0: This is a non-alloy structural steel grade. The mechanical properties of S235J0 include a minimum yield strength of 235MPa, a minimum tensile strength of 360-510MPa, and an elongation at break of 26%.
– DX51: This refers to a galvanized steel grade. The mechanical properties of DX51 include a minimum yield strength of 270MPa, a minimum tensile strength of 340-500MPa, and an elongation at break of 20%.

chemical properties:

– S235J0: The chemical composition of S235J0 includes elements such as carbon (C), manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), and nitrogen (N). The maximum percentage composition is as follows: C=0.20, Mn=1.60, Si=0.55, S=0.040, P=0.040, and N=0.012.
– DX51: The chemical composition of DX51 galvanized steel grade is primarily iron (Fe) with a coating of zinc (Zn). The zinc coating is typically between 100-275 g/m², providing corrosion resistance to the steel.

Both S235J0 and DX51 have their own unique mechanical and chemical compositions, catering to different applications and requirements in the steel industry.