High-strength ferritic stainless steel for clamping device and manufacturing method thereof

Disclosed are a high-strength ferritic stainless steel STS430 which has a yield strength of 350 MPa or more and which can be applied to a clamping device for a vehicle or a common hose, and a method for manufacturing the high-strength ferritic stainless steel STS430. According to one embodiment of the present invention, a high-strength ferritic stainless steel for a clamping device contains, by weight%, 0.04% to 0.1% of C, 0.2% to 0.6% of Si, 0.01% to 1.5% of Mn, 14.0% to 18.0% of Cr, 0.005% to 0.2% of Al, 0.005% to 0.2% of V, 0.02% to 0.1% of N, and the balance Fe and unavoidable impurities, and satisfies formulae (1) and (2), and having at least 2.5 * 106/mm2 precipitates having an average diameter of 0.5 [mu] m or less. (1) 0.35% < = Si + Al + V < = 0.6% (2) 0.09% < = C + N < = 0.12%. 公开了高强度铁素体不锈钢STS430及其制造方法，所述高强度铁素体不锈钢STS430具有350MPa或更大的屈服强度并且可以应用于车辆或普通软管的夹紧装置。根据本发明的一个实施方案，用于夹紧装置的高强度铁素体不锈钢按重量％计包含：0.04％至0.1％的C、0.2％至0.6％的Si、0.01％至1.5％的Mn、14.0％至18.0％的Cr、0.005％至0.2％的Al、0.005％至0.2％的V、0.02％至0.1％的N，以及余量中的Fe和不可避免