Abstract: To meet the demand for steel products by the domestic concentrated nitric acid producers, the seamless tube of KY704 hi-silica austenitic stainless steel for nitric acid service has been jointly developed by Huzhou Jiuli Stainless Steel Tube Co., Ltd., Zejiang Jiuli Corp. and Beijing Keye Steel Products Co., Ltd. Detailed in the paper are such aspects concerning the said product as selection of the key manufacturing processes, the R & D course, main technological characteristics, solution of crucial technical issues as well as actual test and measurement data.