YD327A-4耐磨藥芯焊絲；                      規格；1.2-1.6-2.0-2.5-3.0-4.0，                                                    化學成分；C0.35-0.55,Cr4.8-6.2，W0.90-2.0，Mo0.80-1.40，Mn1.2-1.9，Si0.4-0.9，V0.9-1.5，                                    硬度≥50  。                                                                    適用范圍；鋼軋輥，熱軋工作輥，支撐輥，連鑄機輥，校直輥的堆焊。