Weirton Steel: Glossary M

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Misc.

M

Material Safety Data Sheets (MSDS)
Sheets that document safety issues associated with various materials used.

Matte Finish
A dull or grit surface appearance achieved by rolling on rolls which have been roughened by mechanical, chemical, or electrical means to various degrees of surface texture.

Matte Surface
A dull surface appearance on a tin plate product; non-reflowed tinplate. See Reflowed Surface.

Mechanical Properties
Those properties of a material that reveal the elastic and inelastic reaction when force is applied, or that involve the relationship between stress and strain; for example, the modulus of elasticity, tensile strength, and fatigue limit. These properties have often been designated as "physical properties," but the term "mechanical properties" is much to be preferred.

Medium Carbon Grade
At WSC, steel with a Carbon content of .08% to .20%. See Low Carbon Grade and High Carbon Grade.

Microvalve
A control valve used to control the hydraulic pressure to the clutch plates on the winch drive.

Mill Edge
A hot band processed through the Pickler without being side trimmed. This replaces the old term, band edge.

Min. Triple Spot Aver. Coating
The average of three coating weights test results obtained from a full width sample of a galvanized (or any other coated) coil: 2 inches from each end and dead center.

Minimized Spangle
A dull Hot-Dipped Galvanized surface appearance in which the normal zinc formation has been suppressed; achieved by applying water droplets or some other nucleating agent to the zinc surface after the bath but before the zinc solidifies to suppress the growth of spangle.

Misting
A coating defect consisting of a condition encountered, primarily on
D & I high speed beverage can coating machines, which appears as many fine spots of coating.

Modulus of Elasticity
The number which represents the relative "springness" of a given type of metal. All steels have the same modulus of elasticity or "springiness" regardless of the tensile or yield strengths. That is, until the yield point is reached they all stretch the same amount for a given load. Aluminum, on the other hand, is more elastic than steel and thus will stretch more than steel under the same loading.

Mult
A "mult" is the term used to describe the slitting of a coil into multiple smaller strips. If a coil is slit into strips less than 9", each strip is referred to as a "mult" and does not receive an individual IPM number. Mults are not removed from the line individually, but as a whole coil unit. For reasons pertaining to customer orders, however, they may be separated and packaged with "mults" from other coils for shipping.

Multi stage pumps
No. 3 and No. 10 pumps that are designed to put out different amounts of water pressure by changing the speed of the pump by opening up different ports on the turbine of the pump.