The heats and what each is used for: Sparkling or Sizzling heat. Never used. Destroys the metal alloy content and grain structure. White heat or welding heat. For welding mild steel and iron. Remove from fire when sparks begin to fly and stop forge welding when down to light yellow heat. Light Yellow heat. Best heat for forging wrought iron and mild steel. Try to obtain this heat before removing from the fire for forging. Sometimes this is described as a light welding heat.
Top definition. umh. Similar to uhm, it is a cross between uh and um. Used to describe a thought, comment or response that is lingering. umh...I'm not sure where to go for dinner.
uh (US) 1  Expression of confusion or uncertainty. Uh, who was that? 2  Space filler or pause during conversation. Uh, let me see...