St37 is a German brand, but it is a general brand, and there are several smaller brands.

For example, St37-2 St37-3U St37-3n RSt-2 USt37-2 and so on.

ST37-2 is a German carbon structural steel material grade

Equivalent to carbon structural steel Q235B

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st12 is equivalent to Q235

St12 yield point 280N/mm2 Tensile strength 270 ~ 410N/mm2

Chemical composition (%) : C≤0.10%, Mn≤0.50%, P≤0.035%, S≤0.035%

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ST52 Chemical composition (%):

C: 0.18 or less; Si: 0.50 or less; Mn: 1.70 or less; P: 0.030 or less. S: 0.025 or less; Nb: 0.07 or less; V: 0.15 or less; Ti: 0.20 or less; Cr: 0.30 or less; Ni: 0.50 or less; Cu: 0.30 or less; N: 0.012 or less; Mo: 0.10 or less. Als:≥0.015.

Mechanical properties:

Yield strength (MPa):

Unalloyed steel is counted as ordinary structural steel, which is mainly characterized by tensile strength and yield point. It is used in civil construction, underground engineering, bridge structure, Marine structure, container manufacturing and automobile and machine manufacturing.