A402是鈦鈣型藥皮的Cr26Ni21純奧氏體不銹鋼焊條。。，有良好的焊接工藝性能。                                    

用途:                                    

用于在高溫條件下工作的同類型耐熱不銹鋼焊接，也可用于硬化性大的鉻鋼（如Cr5Mo、Cr9Mo、Cr13、Cr28等）以及異種鋼的焊接。                                    

熔敷金屬化學(xué)成分(%)                                    

    C         Si    S    P    Cu    Ni    Mo    Cr

保證值    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

熔敷金屬力學(xué)性能                                    

試驗項目                                    

Rm(MPa)                                    

A(%)                                    

保證值                                    

≥550                                    

≥25                                    

參考電流：                                    

焊條直徑(mm)    φ2.0    φ2.5    φ3.2    φ4.0    φ5.0                

焊接電流(A)    40~80    50~100    70~130    100~160    140~200                

注意事項:                                    

1.焊前焊條須經(jīng)200-250℃烘焙1h。                                    

2.盡可能采用直流電源，電流不宜過大。