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Difference between Black mild steel and bright mild steel?
from what i can gather, which isn't alot:Cold Rolled Steel Strip is produced, as the term suggests by the further rolling of strip produced by the hot strip mills.Prior to cold rolling, the mill scale has to be removed, normally by the Pickling Process which uses mechanical manipulation (around small diameter rolls) and acid to dissolve the surface scale. The surface is then washed to remove the acid and a light oil added to prevent rusting.Mild steel sheet is manufactured generally in two grades, cold rolled and hot rolled.Hot rolled mild steel sheet is the initial product produced by the steel mill as a downstream process prior to further processing such as cold rolling.Hot rolled mild steel sheet has a mill scale which is usually black in colour. Hence the common name Black Mild Steel Sheet. Black mild steel sheet is commonly used in fabrication shops, it is more economical than cold rolled mild steel sheet.Black mild steel sheet will usually require more preparation work prior to any finishing system being applied.Cold rolling is done to:Reduce the thicknessImprove the surface finishImprove the thickness tolerancesTo offer a range of "tempers"As a preparation for surface coating
What is drop forged steel?
The term "drop forged" is referring to the process in which super-heated steel is formed into items such as tools etc. More particularly, it accurately describes the motion of "dropping" a hammer onto the hot steel.
What is a steel mill?
A Mini Mill, i.e. Electric Arch Furnace (EAF) melting shredded steel scrap &/or a combination of Hot Briquetted Iron (HBI) or Direct Reduce Iron (DRI).
Definition Hot working metal?
Plastic deformation of metals above the recrystallization temperature.
Describe and explain the steel production?
When iron is smelted from its ore by commercial processes, it contains more carbon than is desirable. To become steel, it must be melted and reprocessed to reduce the carbon to the correct amount, at which point other elements can be added. This liquid is then continuously cast into long slabs or cast into ingots. 96% of steel is continuously cast, while only 4000 ingots are cast per year. The ingots are then heated in a soaking pit and hot rolled into slabs, blooms, or billets. Slabs are hot or cold rolled into sheet metal or plates. Billets are hot or cold rolled into bars, rods, and wire. Blooms are hot or cold rolled into structural steel, such as I-beams and rails. In modern foundries these processes often occur in one assembly line, with ore coming in and finished steel coming out. Sometimes after a steels final rolling it is heat treated for strength, however this is relatively rare. Hope this helped
How is mild steel made?
Mild steel is made by blasting hot air into pig iron. This makes it malleable so it can be shaped into useful things.
Does mild steel become harder when heated?
Mild Steel is not hard and brittle. Once Mild Steel is subjected to heating and then allowed to cool, it forms different compounds of steel having different properties. This depends upon 1. The heating temperature 2. The time allowed for cooling. When MS is heated to high temperatures so that it appears red hot and then suddenly cooled down to ambient temperature, it forms a compound called Martensite, which is hard. This is because there is more carbon in Martensite then in Mild Steel. This process of altering properties of compounds by heat is called heat treatment.
What is the temperature of hot steel?
49° Celsius
What is hot working of steel?
The hot working of steel can easily be defined as " the mechanical working on steel after heating above the recrystallization temperature" e.g. forging, hot pressing, drawing etc.
Why does a steel nail go from shiny to dull when it is held in a hot flame?
when a steel nail is held in hot flame it gets burned and by reacting with oxygen and becomes iron-oxide. so, it becomes dull.
Is the Mercury becomes solid in hot and liquid in coolest temperature?
No, mercury does not become solid in hot temperature and liquid in coolest temperature. But mercury becomes gas or liquid in hot temperature and becomes solid in coolest temperature. Mercury becomes solid after freezing point of -38.72 degrees Celsius. Solid Mercury can become superconductor in reaching of its critical temperature 4.2 K. Mercury is liquid under the room temperature (25 degrees Celsius). Mercury becomes gas after boiling point of 357 degrees Celsius.
Is mild steel ductile or brittle?
the tensile strength, hardness and yield strength of steel depends on the amount of carbon in it. this is because amount of pearlite increases linearly with % of C in steel from 0-0.77%. Elongation (ductility) is caused by the ferrite in the steel which forms plastic deformation. there are two ways of treating steel: 1) quenching- this is when red hot steel is rapidly cooled to R.T. this traps most of the carbon in the steel forming pearlite that makes it hard and brittle 2)Normalising- this is when red hot steel is cooled slowly to R.T and allows carbon to dislocate and form ferrite which makes it ductile. this is how mild steel is manufactured.
In metallurgy what is hot shortness in steel?
The term is used for character of steel, which become brittle at hot working temperature ie above 0.6 Tm (recrystallization temperature, where strain hardening is removed ) hot short hinders in hot working operation, often caused by the presence of sulphur in metal.
How do you increase hardness of mild steel?
You heat your object until its hot red and then you cool it quickly in water
Is hot-rolled steel magnetic?
Yes, hot-rolled steel is magnetic. A few types of steel have limited magnetic properties, but hot rolling is a process by which steel is prepared in a shape for marketing. The hot rolling does not affect the ability of the steel to be attracted to a magnet.
Density of galvanized iron?
A galvanized iron is similar to steel; it is material that composed of cold-rolled and hot-dip galvanized mild steel. It has 7850 kilograms per cubic meter density same as a steel.
What is the temperature of welding arc to weld metal?
Depends on the metal, but for steel it is hot enough to melt the steel- and steel melts at 2600-2800 degrees F.
