DIN 2393 is a (Deutsches Institut für Normung, or German Institute for Standardization) standard for welded (seamed) cold-drawn steel tubing, but the 2393 standrd has been replaced by DIN EN 10305-2 (same thing, just a different number).
Here is a table showing the chemistry and strength (yield strength and tensile strength) of DIN EN 10305-2.
In comparison to SAE/AISI standards, EN 10305-2 has slightly higher yield and tensile strength than 1020 carbon steel.
SAE 1020 has a cold-drawn yield strength of 205 MPa and a cold-drawn tensile strength of 420 MPa.