Do you need cpm 3v steel for wood carving, and batoning?
For uk weather, do you need to consider stainless steel like elmax? Will 3v rust easily?
This is rather an strange question, at least the first part is. "Do you need CPM3V steel for wood carving and batoning?" That is like, "Do I need a Range Rover to drive off road?" or "Do I need GoreTex to go hill walking?"...only more so. It is almost as if Peter has had someone tell him something and is looking for second opinion.
So, to answer that, whoever told you you needed 3V for carving and batoning is wrong. Sure, 3V is tough and will be stronger than some other options for batoning, but it isn't needed. Properly designed, lots of steels will work fine. Just as a poorly designed knife in 3V will neither carve nor stand up to batoning.
To me, saying "don't baton" because you might break a knife is a bit like saying "don't walk in the woods" because you could step in a hole and break a leg. There are clear benefits and a lot of risk can be mitigated by care, attention and practice.
For carving, you don't need high carbide loaded steel.
For general outdoors use in Britain, stainless is nice, but far from necessary. Higher spec stainless can be nicer than cheaper stainless, but you do have to be careful that you get what you want, and that what you want isn't unreasonable. For instance, my experience is that 12C27 is quite good, but is not as stain resistant as RWL34, but it is cheaper. Elmax has a good reputation for toughness and stain resistance, but I don't know what sort of edge it takes. S30V is good for stain resistance and has been hyped as great steel, but it soon loses its razor edge (although a coarse working edge last a long while). Hunters are often more interested in a toothy edge that will slice hide and resist blunting from abrasive wear, that does not chip when it hits bone, compared to carvers who like a smooth razor edge that can be worked to a low angle.
Chris