Weldability of ASTM A148
Weldability of ASTM A148
(OP)
I am wondering how well ASTM A148 - (105-85) Cast Steel can be welded to a CSA 50W plate?
We are currently welding a ASTM A27 Cast Steel to a 50W plate but would like to upgrade the material.
Thanks in advance.
We are currently welding a ASTM A27 Cast Steel to a 50W plate but would like to upgrade the material.
Thanks in advance.





RE: Weldability of ASTM A148
RE: Weldability of ASTM A148
RE: Weldability of ASTM A148
1) Within ASTM A148: between the different grades, is
90-60 more weldable than 105-85?
2) ASTM A148 does not provide a chemical composition, "Arunmaro" where did you get those values.
3)I came across an interesting formuale for weldability from the ASM Metals Handbook 2nd Ed:
CE = %C + %Mn/6 + %Ni/15 + %Cu/15 + %Cr/5 + %Mo/5 + %V/5
When CE < 0.45%, weld cracking is unlikely and no heat treatment is required
Has anybody used this formuale with confidence. If so, how can you apply it to ASTM A148
Thanks in advance
RE: Weldability of ASTM A148
RE: Weldability of ASTM A148
The carbon equivalent (CE) equation is used to evaluate "weldability" of steel (cast or wrought), where besides carbon content, other alloying elements as arunmrao mentioned are considered. However, to successfully apply the CE equation you need to know the chemical composition of the steels you are joining.
RE: Weldability of ASTM A148
Can you quantify it, maybe with carbon content of either?
RE: Weldability of ASTM A148
RE: Weldability of ASTM A148
I noticed the Manganese is less for A27, does that mean it welds better or easier?
RE: Weldability of ASTM A148
ASTM A 27 is a specification for carbon steel castings for general application. Because of their lower strength, fewer precautions are required for welding, in comparison to higher strength grades, and they are less sensitive to cracking during or after welding.
RE: Weldability of ASTM A148
Or is the 90-60 still more likely to crack in service. I just want to make sure the switch to the higher grade material will be worth the change.
Thanks
RE: Weldability of ASTM A148
Given your statement above,....
The switch to the higher strength casting only provides more margin for strength, nothing else. The issue of cracking susceptibility does not factor in given the statement above.
RE: Weldability of ASTM A148
ASTM A27 70/36 CE = 0.47
ASTM A148
90/60 CE = 0.48 (Assume no Ni, Cu, and Mo) (C=0.28, Mn=1.2)
105/85 CE > 0.48 (There is Ni, Cu, and Mo how much???)
As for Grade 80/50, and 80/40 do you know the approx chemical comp???
If the above is correct, the 90/60 is as weldable as the 70-36. The 105/85 is not as weldable by a factor of x
RE: Weldability of ASTM A148