Metal Glossary

Designed to be a quick reference guide for customers, the Cashmores glossary provides definitions of the latest metal industry terms.

Metal Glossary

Designed to be a quick reference guide for customers, the Cashmores glossary provides definitions of the latest metal industry terms.

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CPP Plate

CPP is short for Continuously Product Plate - CPP is hot rolled plate up to 12mm thick and will have been coiled up during the production by hot rolling as compared to Quarto Plate over 12mm thick that will not have been coiled during production by hot rolling. For more information and the stock range please click on the link below.
Related Terms: Quarto Plate

More information: https://www.cashmores.co.uk/datasheets/Stainless-Steel-Stainless-Steel-Quarto-Plate-and-CPP-Plate_422.ashx
Creep

The tendency of a metal to flow or deform permanently under an applied load that is lower than its yield point. It is time and temperature dependent, the rate always increases with temperature.
Crevice Corrosion

Localised corrosion that occurs in narrow crevices where stagnant, non-aerated, liquid can accumulate. It is a particular problem with alloys, such as stainless steels, that rely on a passive film to protect them as these films are unstable in the presence of high concentrations of Chloride Cl- and Hydrogen H+ ions. The lack of aeration prevents the passive film from regenerating so attack can proceed. Good design is the key to preventing crevice corrosion.
Deformation

The change in dimensions and/or shape of a material or work-piece due to applied forces. Deformation can be elastic or permanent. Elastic deformation happens when the work-piece returns to is previous dimensions or shape when an applied load below the yield point is removed. Loads above the yield point cause permanent deformation when the change in shape or dimension is not reversed when the load is removed.
Related Terms: Yield Strength, Yield Point
Descaling

The removal of surface scale from hot worked or heat treated products by acid pickling or mechanical means such as grit or shot blasting. Caution is advised if stainless steels are mechanically descaled as blasting media can be embedded in the surface and act as corrosion initiation sites. It can also refer to the removal of scale formed during hot working processes by the application of water, coal dust, brushwood, oil, etc.
Ductility

The ability of a metal or alloy to deform without cracking or failing under tensile loads. Materials with low ductility exhibit brittle behaviour and fail at more modest loads. Ductility typically decreases at lower temperatures and most materials will become brittle below a certain temperature called the Ductile-Brittle Transition.
Duplex Stainless Steels
Duplex stainless steels have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. The proportions are approximately 50% of each phase. Duplex stainless steels:
- are stronger, by a factor of up to 2, than the austenitic and ferritic grades
- are tougher and more ductile than the ferritic grades
- have better stress corrosion resistance than the austenitic grades.
Related Terms: Austenite, Austenitic Stainless Steel, Ferrite, Ferritic Stainless Steels
Eccentricity

This occurs in tubular products when the centres of the circles that describe the outside diameter and the bore do not coincide. It manifests itself as a variation in wall thickness around the tube.
Related Terms: Concentricity
Electrochemical Corrosion

Corrosion, or metal dissolution, caused by the reaction M ? M+ + e- at the anode.
Electrochemical Protection

The prevention of corrosion in an electrolyte by manipulation of the electrode potential of steel.
Electrode

There are two electrodes in an electrochemical or corrosion cell, the anode and cathode. They are the electron conductors, through which electrons can enter and leave an electrolyte permitting reactions such as dissolution at the anode and deposition at the cathode to occur.
Electrode Potential

The potential difference in a solution between the test electrode and a reference electrode, e.g. a saturated calomel electrode.

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Metal Glossary

Metal Glossary

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