General selection of filler metal size

By Lawrence (*****)

Date 01-02-2019 12:18

Throw us a bone Mike

Process ?

Base metal ?

Application ?

By Mike1980 Date 01-02-2019 13:04

First, thanks for taking the time to reply.

pWPS 1:

Process: GMAW (short circuit transfer)

Base metal: A572Gr.65

One-sided Fillet weld with full penetration in overhead position

plate Thickness : 18 mm (0,71 inch)

pWPS 2:

Process: FCAW

Base metal: AISI 316

Butt weld with full penetration in 2G welding position

Pipe dimensions :Outer diametar: 300 mm
Thickness: 15 mm

By 803056

Date 01-02-2019 14:25 Edited 01-02-2019 15:26

GMAW, Fillet, complete joint penetration? How do you have a CPJ using a fillet weld?

FCAW in 2G position, try 0.045 inch diameter.

I second Lawrence's recommendations.

Al

By Mike1980 Date 01-02-2019 14:53

sorry, it is Groove weld type and T joint type

By Lawrence (*****)

Date 01-02-2019 14:40

Ok... Now we can ask question and make comments.

"pWPS" Does this mean prequalified WPS?   or the pre-WPS being produced prior to making a PQR ?

A572 GR65 is a Group 3 prequalified base metal in AWS D1.1
Short circuit GMAW will work best with .035 solid wire.   Any major vendor will supply basic parameter data on their website.   Having said that, That is very thick base metal for short circuiting transfer, It can be done, but there are much better alternatives.   Fillets are not full penetration welds, so I assume you mean good fusion at the root.   In the overhead position this is much more easily accomplished with an E71T-1 FCAW electrode (.045)

The AISI 316 austenitic stainless is going to probably be best done FCAW with an .045 or .052..   Again the wire manufacturer always provides some basic data for usage.

By Mike1980 Date 01-03-2019 09:14

I need pre-WPS prior to making a PQR.

For FCAW welding should I use shield gas or without? Do I need to decrease amperage because of welding in overhead position ?

By Tyrone

Date 01-03-2019 12:44 Edited 01-03-2019 19:31

Hey Mike,
FCAW-S (self shielded) or FCAW-G (gas shielded). Use FCAW-G if the final welds will be in a shop (not outdoors).
Turn up your voltage and wire feed (compared to vertical weld parameters). Gotta have that wire digging in the overhead position.
Either way, you are going to start with whatever the wire manufacturer recommends for parameters. Then play for a while until you get a good feel for the range.

Tyrone