COSMAX – 309 Cb
Classification : AWS : E 309 Cb 16 , IS 5206 : E 23.12 Nb R16
Characteristics : A medium heavy coated, all positions rutile type electrode depositing 25 Cr/12 Ni columbium stabilised deposit. The electrode gives an excellent resistance to chemical corrosion and heat, The weld deposits can stand upto 1100°C in continous service.
Applications : COSMAX 309 Cb is used for the welding of AISI309 Cb type, straight chrome steel, joining stainless steel to low alloy steel and carbon steel. Ideal for similar composition stainless steel in cast or wrought form. Ideal for joining dissimilar combinations of 18-8-Cb stainless steel to mild steel, clad side of 18-8 Cb stainless steel and overlay applications.
Weld Metal Properties (%) :
C = 0.10 Max Mn 1.0-2.50
Si = 0.30-0.75 Cr 22-25
Ni = 12-14 Cb 0.7-1.0
All Weld Mechanical Properties :
UTS = 560-660 l\|/mm2
YS = 430 N/mm2
Elong (L=4d) % = 30-40 Min
CVN Impact Value Temp°C at J 27±2°C- 50- 100
Current Condition – AC or DC (+)
Precautions : Electrodes must be dry, moist electrodes should be redried at 150°C for One hour.