Features and Scope
Higher strength steel than the 15th, rarely quenching, no temper brittleness. Cold deformation on the crack-prone plastic high, usually for bending, welding performance rolling, curved edges and hammer arch machining, welding arc and contacts when welding small thickness, shape demanding or complex shape parts. Machinability cold drawn annealed or normalized relatively good state, generally used in the manufacture discontinuity large and toughness requirements.
Chemical Composition
Carbon C: 0.17 ~ 0.24 "
Si Si: 0.17 ~ 0.37
Mn Mn: 0.35 ~ 0.65
Sulfur S: ≤0.035
Phosphorus P: ≤0.035
Chromium Cr: ≤0.25
Ni Ni: ≤0.25
Copper Cu: ≤0.25