Metallurgy 1
Which type of metal is made by remelting pig iron in a cupola furnace
cast iron
In steel forming which type of steel is produced with squared edges and a high quality finish?
Cold rolled steel
What is done to steel during the galvanizing process?
Steel components are bathed in molten zinc at 450C
How are structural shapes of steel produced?
By hot rolling blooms and billets
What happens when the amount of carbon in carbon steel is increased?
It will increase the strength of the steel.
What term relates to the exact moment that a metal changes from elastic to plastic deformation.
Yield point
Which type of metal has the characteristics of being light weight reflective and non magnetic?
Aluminum
What is the primary element in stainless steel?
10% or more chromium.
The file cut easily into the metal what type of metal is it?
Low carbon
What is used when preforming a melting point test?
Temp stick
To what temperature should all metals be heated. To remove the moisture prior to welding?
21 C or 70 F
Which type of cast iron is used in hard facing applications cannot be welded or machined due to being very hard and brittle?
White cast iron
Which type of steel is fully deoxidized by adding aluminum and silicon to the melting during production
Killed steel
What is the CSA G40.21 for a weldable structural steel where notch toughness is NOT a concern?
(W)
Hematite, limonite ,and magnetite are all types of what material ?
Iron Ore
What is the approximate melting temperature of steel?
1535C or 2800F
Which mechanical property is determined by conducting a Charpy V-notch test?
Toughness
Which types of metal often requires shielding on the backside of the joint ( purging) to prevent oxide contamination?
Stainless steel
Which heat treating process produces a weldment with high hardness but improved toughness and ductility?
Quenching and tempering
What is the process for reducing residual stress by thermal stress relief?
Post heat treatment 650C for 1 hour per inch of thickness.
What (P) number designation is given to welding of A36 steel plate and bar shapes?
P-NO.1
What is the carbon content of structural steel plates?
0.15-0.30%
What are metal alloys that do not contain iron called?
NON- ferrous alloys
Which state of matter can be compressed but is not electrically charged?
GAS
What is the operation called when a material is heated to a single phase region and then allowed to cool in air?
Normalizing