... bistoury,valve part,bearing etc Quick Details Standard:JIS, AISI, ASTM, GB, DINDimensions:Dia 15-280mmGrade:400 SeriesPlace of ... 1030Temperings:200HRC:55-57Alloy Or Not:Is AlloyType:Stainless Steel BarPackaging & Delivery Packaging Detail:unpacked.Delivery Detail:7 ... melting→Refining furnace → Vacuum treatment furnace → Cast ingot → Steel ingot anneal → Heating → High-speed forging,refining forging → ...