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.
UHMW (Ultra High Molecular Weight Polyethylene) is an outstanding choice for relatively low cost abrasion, impact, and chemical resistance. UHMW provided by Interstate Plastics is also known by brand names including IPX, Polystone, Tecafine, Dyneema, TivarÂ®, Polysteel, GUR, Utec and Mipelon. Known for an extremely high molecular weight, UHMW features an unsurpassed combination of slickness, toughness and chemical resistance. UHMW's molecular weight ranges from 3.1 million to 100 million grams per mole, with an abrasion resistance that continues to improve as molecular weight increases.