23 29 the comparative example 23 exceeded the range specified by the present invention in the quantity of c the comparative example 24 was excessive in the quantity of si the comparative example 25 was excessive in the quantity of cr the comparative example 26 was short in the quantity of cu the comparative example 27 was short in the quantity of ni the comparative example 28 was short in the value of cu ni 8 the depth of corrosion pit is greater than 100 u03bcm and 7 the corrosion fatigue strength was insufficient the high strength spring steel of the present invention has an excellent drawing workability as a rolled material and an excellent manufacturability so that no crack occurs in quenching further it has a high strength of hrc52 or higher u03c4 max 1176 mpa or more as strength of quenched tempered material and excellent fatigue strength and corrosion fatigue strength further it has required characteristics suitable for the high strength spring next a coil spring obtained by performing warm shot peening on a spring steel in the range specified by the invention described above in which an excellent fatigue strength corrosion fatigue strength and permanent setting resistance are achieved will be shown as an example although a cold forming.