Standard: DIN 17175 Grade: St35.8, St45.8 Chemical composition Elements St35.8 (1.0305) St45.8 (1.0405) C ≤0.17 ≤0.21 Si 0.1-0.35 0.1-0.35 Mn 0.40-0.80 0.40-1.20 P  max 0.040 0.040 S  max 0.040 0.040   Mechanical properties Steel grade Tensile properties at room temperature Impact properties Upper yield stength or proof strength ReH or RP0.2 for Wall Thickness T…