SUPRAMAX – 9018 B3

Classification :  AWS  :     E9018-B3 , BIS  :  E 63 B-B3-2-6-Fe

Characteristics  :   This is a medium   heavy coated, hydrogen controlled, iron powder type all positions electrode depositing a weldment of the type 2.25% Cr and 1% Mo suitable for welding of high tensile chrome-moly steel. The weld metal is sound and of radio graphic quality and excellent mechanical strength and creep resistance at temp, upto 500°C.

Applications : It finds extensive use in fabrication of low alloy steel boilers and piping operating at temperature upto 600°C in oil refinery, thermal and chemical plants, super heaters for steam boilers, pipelines working at high temperature and especially for hydro crackers.

C       =0.10 Max           Mn =   0.90 Max

Si       =   0.60 Max        S =      0.03 Max

P        =   0.03 Max       Cr =    2.0-2.50

Mo     =   0.90-1.20

All Weld Mechanical  Properties  :

UTS           =    625-750 N/mm² 

YS               =    540-670 N/mm²

Elong (L=4d) % = 17-25

CVN Impact Value (J) at 27 + 2°C: 120

Creep Data :    (1 % offset/10000 hours)

Testtemp°C       500 525 550 575 600

Creep Strength N/mm²  20.0 15.5 12.0 8.5   7.0

Precautions   : Ensure the electrode is dry. In case of moisture pick-up, re-dry the electrodes at 300°C for one hour