Silicon Iron Alloy, Having A Silicon Content Of Between 40 And 90%; Typically Contains A Large Amount Of Iron Silicas And 1-2% Calcium. Ferrosiliconand Aluminum.
Obtaining : - By Reducing The Silicon Dioxide (sio2, Natural Mineral = Quartz) At High Temperatures In Electric Furnaces.
Use :
- In The Production Of Alloyed Steels, Silicon Content Ensuring Good Deoxidation, As Well As Preventing The Decarburization Of Molten Steel;
- Added To Gray Cast Iron, Increases Fluidity In Molten State.
Chemical Composition : Si 72 ÷ 80%; Al = 1.5-2.0% Max; P = 0.05% Max; S = 0.04% Max; C = 0.20% Max.
This item is a practical and multi functional smartwatch, which adopts quality shell and silicone band. It is not only a watch which can display the time and date, but also can act as a GPS to mark its location. It also has SOS/ Anti-drop off alarm function. Specially designed for children and students to wear.
Feature
- Equipped with GPS global positioning system, it will show its location at any time to monitor the child position.
- It supports micro SIM card so it supports making calls at any time, and it features a SOS button which is designed for emergency. It will ring the reserved phone number until it gets through.
- You can set some creation areas for your kids on the APP maps, once kids leave these areas, the APP will alarm to remind you automatically.
- The waistband is made of soft flexible silicone, easy to be folded to secure kids wirst without squeezing and breaking.
- Note: There is no SIM card on the case so you need to take the battery out to settle the SIM card and this is not a difficult thing if you have some basic tools.
Magnesium: Very Resistant Metal, White-silver, Very Light. It Gets Mildly In Contact With The Air.
Obtaining : - Magnesium Is An Alkaline-earth Metal And Therefore Only Meets The Other Elements. It Is Found In Large Deposits Of Magnesite (magnesium Carbonate), Dolomites And Other Minerals (eg Talc).
Use :
- Magnesium Compounds, Mainly Magnesium Oxide, Are Used As A Refractory Metallurgy For Iron And Steel Industry Furnaces - Iron And Steel, Non-ferrous Metals, Glass And Cement;
Magnesium Oxide And Other Compounds Are Also Used In Agriculture (as Fertilizers), Chemistry And Construction Industry;
- Magnesium Alloys Are Also Used As Components Of The Automobile Structure.
-to Remove Sulphides From Iron And Steels;
-combined In Alloys, Is Essential In The Construction Of Airplanes And Missiles;
-alloyed With Aluminum, Improves Its Mechanical, Machining And Welding Characteristics.
Properties : - Very Resistant Metal, White-silver, Very Light. It Gets Mildly In Contact With The Air. It Is Easy To Light When It Is In The Form Of Thin Strips. Once Ignited, It Burns Like A White, Very Bright Flame, And Is Hard To Quench, Being Able To Burn On Interaction With Nitrogen And Carbon Dioxide.
Material Specification : According To Sr En 12421-2000.
