GI AND SS – POINTS TO BE NOTED
Pavithra K R
Diploma civil engineer | diploma in quantity surveying |3d animator|licensed supervisor B| Draughtsman cum site engineer |
?GI MEANS GALVANISED IRON
?COATED WITH ZINC TO PROTECT FROM RUST
?INCLUDES 10% CHROMIUM – ALSO PROTECTION FROM RUST
?WATER RESISTANT
?EASIER TO WORK WITH IT
?LESS EXPENSIVE AS COMPARED TO STAINLESS STEEL
?ECONOMICAL CHOICE
?
DRAWBACKS ;
IT IS NOT SUITABLE UNDER SALT WATER
DURING WELDING HARMFUL FUMES PRODUCED (DUE TO ZINC)
?APPLICATION ;
HINGES,GASKETS,FASTENERS (NUTS,BOLTS,SCREWS ETC.)
? GI ALSO DIVIDED INTO THREE CLASSES BASED ON WEIGHT AND INNER DIA
? CLASS A ,B AND C
? CLASS A ( LIGHT )- CARRIES YELLOW COLOUR? STRIP CHEAPER THAN B & C
? CLASS B(MEDIUM) - CARRIES BLUE COLOUR? STRIP ?& COSTLIER THAN A & CHEAPER THAN C
? CLASS C (HEAVY) – COSTLIER THAN A AND B
?SS MEANS STAINLESS STEEL
?STRONG
?RUST RESISTANT
?CORROSION RESISTANT
DRAW BACKS;
NOT SUITABLE FOR CHLORINATED WATER
EXPENSIVE
HIGHLY SKILLED WELDERS REQUIRED
?APPLICATIONS;
AUTOMOBILE EXHAUST PIPES
MARINE APPLICATIONS
AEROSPACE INDUSTRY
? SS 302, SS 304, SS 304L, SS 316, SS 316L,SS 904L ARE AVAILABLE
? IT BECOME MORE CORROSION RESISTANT ACCORDING TO THE AMOUNT OF NICKEL
EXAMPLE;
SS 302 – 9% NICKEL
SS 304 – IT BECOME 10% NICKEL