Burf86
Member
- Messages
- 218
- Location
- Frome, Somerset
Help please...this is doing my head in. I dont even know where to look for more information, and Ive got a feeling that Im asking for the moon on a stick...
How do I figure out/calculate/estimate the weldability of steels??
The only thing I can find online is to calculate the carbon equivalent, but that doesnt seem to work for everything:
4130 CEV = 0.65 (and its supposedly a bit fussy, though we've never had any problems)
Reynolds 631 CEV = 0.97 (and its supposed to be awesome for welding)
I see that EN30B has a CEV of 0.97 too...does that mean that its really as good to weld as 631??
Really what I want to know is how strong/tough/ductile something will be once Ive welded it compared with the base metal. Is it possible to calculate that? Or just take a best guess and then get some samples tested?
Another factor I suppose is filler (we normally use ER70S-2...A15 or whatever its called in UK numbers) is there a way to work out how that affects the weld?
Lastly, how does welding affect the heat treatment of steel? For example, EN14A is supplied 'hardened and tempered'; would welding it anneal it or...?
If its any help, Id generally be dealing with sections about 0.8 - 3mm thick, always TIG.
Any pointers much appreciated, even just tell me which book I need to read!
Cheers,
How do I figure out/calculate/estimate the weldability of steels??
The only thing I can find online is to calculate the carbon equivalent, but that doesnt seem to work for everything:
4130 CEV = 0.65 (and its supposedly a bit fussy, though we've never had any problems)
Reynolds 631 CEV = 0.97 (and its supposed to be awesome for welding)
I see that EN30B has a CEV of 0.97 too...does that mean that its really as good to weld as 631??
Really what I want to know is how strong/tough/ductile something will be once Ive welded it compared with the base metal. Is it possible to calculate that? Or just take a best guess and then get some samples tested?
Another factor I suppose is filler (we normally use ER70S-2...A15 or whatever its called in UK numbers) is there a way to work out how that affects the weld?
Lastly, how does welding affect the heat treatment of steel? For example, EN14A is supplied 'hardened and tempered'; would welding it anneal it or...?
If its any help, Id generally be dealing with sections about 0.8 - 3mm thick, always TIG.
Any pointers much appreciated, even just tell me which book I need to read!
Cheers,