Glossary
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Many information can be found in aluminum-manual, which is being completely revised and will soon be available. In the meantime, please use our glossary for useful word explanations.
- Hard anodizing
Galvanic process to reinforce the oxide skin of aluminium, layer sizes can be over 100 µm.
- Hardness testing
Static and dynamic test methods for determining the hardness.
- Heat-affected zone
Material areas near the weld whose characteristics are altered by the heat of the welding process.
- Helicoil
A helicoil is a thread insert made of coiled wire; pre-cutting of the female thread is necessary, a special tool is required for insertion.
- High annealing
Heat treatment process that is usually performed before the hot forming process to compensate segregations, reduce residual stresses or evenly eliminate supersaturated dissolved elements.
- Homogenization
Heat treatment in which the chemical composition in microvolumes is made uniform and commensurable with the size of the grains of the alloy.
- Horizontal continuous casting
Variant of vertical continuous casting; solidifying strand emerges horizontally from the casting crack, possible lengths are less limited than in the vertical casting process.
- Hot forming
Processes where metals are plastically deformed above their recrystallization temperature.
- Hot retrieval
Heat treatment of heat treatable alloys to achieve defined strength conditions.
- Hot strip
Intermediate product produced by hot rolling and rolled into coils.
- Hot top casting
Use of very short moulds with refractory, insulating layers without metal level control for generating high and uniform quality in multiple billet casting