17-4PH Stainless Steel Round Bar UNS S17400 / Type 630 | ASTM A564 | Material for Shafts, Valve Components and Precision Machining Shaanxi Shangyou Stainless Steel Co., Ltd. supplies 17-4PH stainless steel round bar for industrial buyers manufacturing shafts, valve components, pins, couplings and machined parts. Send your required diameter, length, heat treatment condition and inspection specification for a quotation matched to your production requirements. Specify Condition