0.04Als)for wheel spoke with finishing rolling temperature 830~890 ℃ and coiling temperature 620~680 ℃ has been carried out by 1700mm hot rolling mill train. Results showed that with slab heating temperature 1230~1250 ℃
finishing rolling tem- perature 870±15℃
coiling temperature 660±15 ℃
the structure of steel plate for wheel spoke was fine ferrite + minor pearlite
the yield strength of steel was 335~380MPa
tensile strength 430~485MPa
elongation 26%~31%
the longitudinal strength difference of each steel coil was 13~37MPa
and the punching formability during vehicle wheel manufacturing was excellent with punching rejection rate less than 0.3%.