Welding Chinese Steel to Australian Steel
Welding Chinese Steel to Australian Steel
(OP)
Hi
We need to weld thick mild steel plates from china and with Australian thin ones using australian filler material.
The Chinese Steel Q235B has a different composition and contains C0. 12 ~ 0.20% Mn 0.30 ~ 0.670 Si = 0.30 S = 0.045 P = 0.045. I have attached the page from the Australian standard AS3678 for grade 250 plate showing its composition and differences.
http:/ /files.eng ineering.c om/getfile .aspx?fold er=106238d f-403d-456 1-88bd-610 90f42bb01& amp;file=A S_3678-199 6_Structur al_Steel_H ot_Rolled_ plates.pdf
It will be a fillet weld 6 to 10 throat thickness. No fatigue involved and maximum stress would be 40 Mpa.
Does anybody think this might cause a problem and what kind of test can be done to make sure all is OK , NDT for example?
Do we need to change our welding procedures?
Thanks for your help
We need to weld thick mild steel plates from china and with Australian thin ones using australian filler material.
The Chinese Steel Q235B has a different composition and contains C0. 12 ~ 0.20% Mn 0.30 ~ 0.670 Si = 0.30 S = 0.045 P = 0.045. I have attached the page from the Australian standard AS3678 for grade 250 plate showing its composition and differences.
http:/
It will be a fillet weld 6 to 10 throat thickness. No fatigue involved and maximum stress would be 40 Mpa.
Does anybody think this might cause a problem and what kind of test can be done to make sure all is OK , NDT for example?
Do we need to change our welding procedures?
Thanks for your help





RE: Welding Chinese Steel to Australian Steel
RE: Welding Chinese Steel to Australian Steel
Dik
RE: Welding Chinese Steel to Australian Steel
The Mn:S ratio is extremely low. Personally I would not touch this stuff with a 10 foot welding rod, although I'm sure your purchasing agent is promoting it so he can show cost savings. Just remember that repair and rework costs always trump material cost savings, by as much as an order of magnitude. That does not cover what it does to your shop scheduling and your own unpaid overtime processing NCRs.
RE: Welding Chinese Steel to Australian Steel
h ttp://nz.l inkedin.co m/pub/jona than-smith /39/25/589
RE: Welding Chinese Steel to Australian Steel
RE: Welding Chinese Steel to Australian Steel
Suggest welding with E7018 electrodes.