Preheat 4130

W

wendell

Aluminum

Joined

Mar 12, 2006

Location

Maine, USA

• Mar 10, 2007

• #1

Fellow welders,
Problem: here in Maine it has and still is pretty cold and I have to start tacking up a frame that isn't in a heated building. Sooo I was going to wait until the outside temp reached 50 and then start. any help on this. its mostly 4130 tubing say .035 and up wall.
wendell

 

W

wendell

Aluminum

Joined

Mar 12, 2006

Location

Maine, USA

• Mar 10, 2007

• #2

BTW I am using TIG.
wendell

 

macona

Diamond

Joined

Jun 20, 2006

Location

Beaverton, OR

• Mar 10, 2007

• #3

Huh? Are you asking if you need to preheat the metal?

 

W

wendell

Aluminum

Joined

Mar 12, 2006

Location

Maine, USA

• Mar 10, 2007

• #4

Yes.

 

J

JL Sargent

Diamond

Joined

Feb 7, 2005

Location

Birmingham, AL

• Mar 10, 2007

• #5

Check this site out. Lots of good info about welding 4130. Suggests for certain size tubing to weld in a room at least 70F.

http://www.lincolnelectric.com/knowledge/articles/content/chrome-moly.asp

 

W

wendell

Aluminum

Joined

Mar 12, 2006

Location

Maine, USA

• Mar 11, 2007

• #6

Thanks JL, seems as time goes on recall is shorter.
wendell

 

GisMo

Hot Rolled

Joined

Jul 29, 2004

Location

South East FL/NYC

• Mar 19, 2007

• #7

You don't need to pre-heat that thin stuff.

 

P

ProFormance

Plastic

Joined

Feb 19, 2007

Location

West Bend, WI

• Apr 9, 2007

• #8

Thick...... preheat, keep it warm after let it cool slowly. Bury it in vermiculite to cool it slowly.

 

S

SLOEIT

Cast Iron

Joined

Mar 28, 2004

Location

Granada Hills, CA

• Apr 10, 2007

• #9

If this frame will be post weld heat treated. It will not really matter.

Thin wall 4130 tubing does not really need a preheat, however since your saying your in maine, and i know they are getting snow...I would say to get it up above 50 or 60 degrees to prevent the formation of undesireable microstructures.

nK