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Brass is tough to figure out. In the 80's I bought a new brass tube and flat plate from the hobby shop to make a funnel for filling oil in my motorcycle. I formed the flat plate into a cone and soldered it to the tube, then made a brass loop handle to solder onto the side of the funnel. I used it once to change the motorcycle oil, then hung it on the wall in my grainary. In the spring I went to use it and found cracks running up and down the tube. No heat was ever applied there and no water froze it, so why should it develope cracks in the tube?
It never cracks on the store shelf.