The low alloying high strength weather-resisting steel SPA-H strip-C≤0. 12
Mn 0.20~0.50
Si0.25~0.75
P0.07~0. 15
S≤0.04
Cu0.25~0.60
Cr0.30~1.25
Ni≤0.65 has been trial-produced by flow sheet of& an 100 t electric arc fumnace-ladle furnace-concaster-rolling mill at Nanjing Steel. The results of examination and service showed that the steel structure was ferrite+pearlite and has higher cleanliness