Welding 5% Chrome

HiYa · Apr 4, 2003

We have been welding 5% chrome 0.5% molybdenum (P num. 5C) with ER502 and E502. I understand that these are the earlier classifications of the welding materials. I have noticed that the filler wire (ER502, E502) is easier to cut and bend than the 1 1/4 percent chrome welding materials (ER80SB2). It is softer than the welding materials containing lower chrome contents. I would have thought that a material containing more chrome would be harder to cut and not as ductile as one containing less chrome. Anyone have any experience with these materials?

Metalguy · Apr 4, 2003

No experience, but annealed 5% Cr steel would be softer than slightly cold-worked plain carbon steel. The potentially huge effect of 5% Cr isn't seen when the steel is annealed.

sayee1 · Apr 4, 2003

ER502 and E502 were included earlier in A5.4/SFA 5.4 and A5.9/SFA 5.9 with stainless steel electrodes and rods (See the 1998 editions of ASME Section IIC) However also note that the consumable clssifications have been changed to E8018 B6, ER 80SB6 in the newer editions and can now be found in A5.5/SFA 5.5 and A5.28/SFA 5.28.
Haven't noticed about the hardness/ductility of these wires as compared to the 1 1/4 Cr 1/2 Mo varieties though! Thanks and regards
Sayee Prasad R
Ph: 0097143968906
Mob: 00971507682668
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