Category archives: Glossary of forging terms

Glossary of forging terms

Forging has been around since at least 4000 BC , it is believed that back in the day hand tools and weapons were among the first things to be forged, using metals and fire.

There are many different types of forging including open die forging, drop forging and hand forging.

There are many different terms used in forging, we have listed just a few to show you the vast range of terminology that you may come across when dealing with the forging process.

Forging Terms

Alloy steel forging – made from steel containing extra alloy elements other than just carbon.

As forged – this is the condition of forging as it comes out of the finisher cavity.

Bender – a die impression or tool designed to bend forging stock.

Block – metal is progressively formed to a general desired shape.

Cast – reproduction of a die cavity.

Chop – a die forging defect

Double forging – a forging that is designed to be cut and used in two separate pieces

Draftless forging – Forging with zero draft on vertical walls

Edging – This is the forging operation of a working bar between contoured dies.

Extrusion – The process of forcing metal to flow through a die orifice

Finish forging – a conventional type of forging

Grain growth – increase in the size of grains of a metal or alloy

Gripper dies – clamping dies that are used in a mechanical upsetter or forging machine

Hammer- a machine that “hammers” a blow

Impression – A cavity machined into a forging die to produce configuration in the workpiece

Ingot – A casting intended for forging

Knockout – A mechanism for releasing piece of work from a die

Liftout – Also known in the forging trade as a knockout

Master block – a forging die block

Mill scale – The oxcide layer that forms during forging and heating

Open dies – Dies that are used for producing hand forgings

A man forging