OVERALL TOPICS OF STEEL

Galvanic action

If two metals are in contact the one with lower nobility will corrode
when iron and copper are in contact the iron will corrode quickly .

Galvanic relationship between metals

anodic

lead
   |
brass
   | 
copper
   |
bronze
   |
monel
   |
titanium
   | 
gold

cathodic

thermal expansion

Metal like material will expand due to its temperature
change per length of material depending on change in temperature

SPECIFIC GRAVITY

relative density of the substances compared with water .

reflectivity

when light hits  the surface of the metal.
radiation can be absorbed or reflected by the surface.

oil canning

the waviness  visible on the flat metal panels
when a pressure is  applied on the sheet metal plate.

welding /soldering 

 welding of  steel is done  with the electric arc to sustain the large structural steel 
and for small structural steel welding with electric arc and MIG - metal inert gas

 Steel yield process 

beyond plastic stage  

when stress is applied

metal reaches it's yielding point 

after tensile strength is used

 finally there is failure

JOINING 

Bolt 
Mechanically joined
Pin
Rivet
Fastener


- J Prasanna


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