Welding Filler Metals 3

[nadfourchon]

I have a WPS with the filler metal specification 4130, manufacture Techalloy, F-No. A & A-No. 11. Testing of this procedure had Charpy Impact testing at -20C. Is it acceptable for me to use filler metal from another manufacture other than Techalloy as long as the specification is 4130, F-No. A & A-No. 11?

 

[Guest102023]

Why does confusion about trade names on welding procedures persist? Because welding is something everybody knows a little about. (But as they say, 'a little knowledge is a dangerous thing'.) Too many amateurs out there writing inefficient or overly restrictive welding procedures.

That said, there is often a difference between welding consumables, especially with covered electrode, in operability and properties. But I have to say some criticism of products is generated by welders having a bad day. ('It is a poor workman who blames his tools'.)

A final saying (one I made up) is: 'when welding on alloy steels, don't always assume your filler metal composition needs to match that of the base metal'.

I'm out of sayings at this point and will shut up.