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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Martensitic Stainless Steels

Martensitic grades of stainless steel are corrosion resistant, although less so than the austenitic grades, but can be hardened by heat treatment. They are straight Chromium steels containing little or no Nickel. They are magnetic and are mainly used where hardness, strength, and wear resistance along with corrosion resistance are required. Typical applications include cutlery, surgical instruments, fasteners, valves, pumps, springs and components for food processing.
Mechanical Properties

The properties of a material that reveal its elastic or plastic behaviour under an applied load. They govern its suitability for any mechanical application. The usual properties considered are modulus of elasticity, yield or 0.2%/1.0% proof strength, ultimate tensile strength, elongation and fatigue limit.
Related Terms: Tensile Strength
Melt, Cast, Heat

These terms are used interchangeably for the product of a single melting or refining furnace charge. Occasionally, if the furnace contents are cast into a number of different forms, these may be called separate casts.
Mill Coil

The hot rolled strip product of a single cast billet or slab.
Mill Edge

The edge produced when sheet or strip is rolled on the flat surfaces only.
Moneypenny-Strauss Test

A corrosion test that uses copper sulphate solution containing sulphuric acid to determine the susceptibility to inter-granular corrosion of stainless steel.
Muffler Grade

Muffler Grade stainless steel is a term sometimes used for Grade 409 (1.4512) stainless steel since the major bulk usage of this grade is for automotive exhaust systems including the catalytic converters.
Non-Destructive Test

Any test method, including eddy current, ultrasonic and dye-penetrant, used to detect surface and subsurface defects without damaging or destroying the product.
Orange Peel

The surface roughening of sheet or strip that develops on subsequent cold deformation if the grain size is too coarse. The appearance is similar to the skin of an orange.
Ovality

Any difference between the maximum and minimum outside diameters of a tube.
Oxide Film
Passive Film

Generally it is the oxide layer spontaneously formed on the surface of a metal or alloy by its reaction with the oxygen in the atmosphere. Specifically in stainless steels it is the protective chromium oxide film that forms on alloys containing more than 10.5% chromium that is impervious to many corroding media. It is why stainless steels are “stainless”.
Passivation

Treatment in oxidising acids to remove light surface contamination by iron based materials left by machining or wire brushing and to enhance the naturally occurring chromium oxide film. Any residual contaminants can act as sites for corrosion cells. Heavy contamination or other contaminants (mill scale, etc.) should be removed by acid pickling before passivation.

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Metal Glossary

Metal Glossary

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