A402是钛钙型药皮的Cr26Ni21纯奥氏体不锈钢焊条。。，有良好的焊接工艺性能。                                    

用途:                                    

用于在高温条件下工作的同类型耐热不锈钢焊接，也可用于硬化性大的铬钢（如Cr5Mo、Cr9Mo、Cr13、Cr28等）以及异种钢的焊接。                                    

熔敷金属化学成分(%)                                    

    C         Si    S    P    Cu    Ni    Mo    Cr

保证值    0.08~0.20    1.0~2.5    ≤0.75    ≤0.030    ≤0.030    ≤0.75    20.0~22.5    ≤0.75    25.0~28.0

熔敷金属力学性能                                    

试验项目                                    

Rm(MPa)                                    

A(%)                                    

保证值                                    

≥550                                    

≥25                                    

参考电流：                                    

焊条直径(mm)    φ2.0    φ2.5    φ3.2    φ4.0    φ5.0                

焊接电流(A)    40~80    50~100    70~130    100~160    140~200                

注意事项:                                    

1.焊前焊条须经200-250℃烘焙1h。                                    

2.尽可能采用直流电源，电流不宜过大。