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welding processes1 smaw
!" • #$%&' • ()*'+, +- • !'.'/+++ !%0(12 )*' • !*'3")4055" • *'3406555" • 76'1)83")4 • 699 !"( • 6)"':$( • 6)"':$(;"& • 6)"':$('" #9<)=3**>4 !& • &!<?<-=) @ !& '=!& ")!& - #'=!& !& @ !& "A = '$& >=& $ &= "" - "" " $ '" &"B$<')"" " = -) & "" ) & 1 "= C= -' D"'"$ '=!& )1'=&<-="&&&'*' "E)-=""="-& "A!"'"-1D$<$""""=&$&- ="$' )&&""= @ ")!&3"F*'!&4 $ = & $"" $ & & ') $ & " !" )' & ''= " @=$ #F ) !" & """)- &' " )'$'= $"$' - '=!& *-'-")&"='&&2''=&$- !"''$G FF)8 ' E') ;)- '') / G' H ?* I J K=!") + =& FF)8 ' &$'$"")A""= &"@'-=" $<$"""'"'-=" D1 ) $"" = ' '- " '-G"""$' FF)8 E')=='G'& *&<=L:$M *> *>$'=*> -"'&:$ ==)"A)3-=$4"'') -;) ''< ""= D1< '< $ & < ) < =< $ ' - G' )#')3'='A&<$84 !"8"8< &3<$<<$=<<<<>8=<''=<6= &4 FF)8 -N;)3M4 ;)O!"&"'""$-="-&)')) &"'&"&$"""-D"O #;- #;$')& #;1 #6)-=""&- - E'8G [...]... SMAW / MMAW / Stick 1.5 Consumables – Covered Electrodes Often referred to as: Electrodes, Rods, Sticks Have two parts Inner core wire Carries welding current Serves as filler metal in the finished weld Outer flux coating Serves as an insulator Provide a slag cover to protect bead and slow cool rate Provide protective gas shield Provides some alloying elements Arc stabilizer Welding Processes – 1 SMAW. .. rod RB electrode, rod, or both RG primarily oxy fuel welding IN consumable insert – placed in the root to serve as filler and support root pass EW non-consumable tungsten F flux used for SMAW Welding Processes – 1 SMAW / MMAW / Stick 1.5 Consumables – The AWS Numbering System Tensile strength is given in pounds per square inch and is obtained by adding three zeros to the number given The next number... Processes – 1 SMAW / MMAW / Stick 1.5 Consumables – Care of MMAW Electrodes Damage or deterioration of the coating may be indicated by one of the following problems: - Weld metal porosity - Arc instability -Excessive spatter - Poor bead profile - Gouging and undercut - ‘Fierce' arc performance - Poor slag release - Heat affected zone cracking - Weld metal cracking Welding Processes – 1 SMAW / MMAW /...Welding Processes – 1 SMAW / MMAW / Stick 1.4 Applications In the past the process has been used extensively for shipbuilding and heavy fabrication, but an increasing proportion of applications involve maintenance and repair... slow cool rate Provide protective gas shield Provides some alloying elements Arc stabilizer Welding Processes – 1 SMAW / MMAW / Stick 1.5 Consumables – Types of Covered Electrodes Welding Processes – 1 SMAW / MMAW / Stick 1.5 Consumables – The AWS Numbering System The AWS uses letters and numbers in a code that gives an electrodes important information E R Arc welding electrode Heated by source other . as filler and support root pass EW non-consumable tungsten F flux used for SMAW FF)8 !">= Tensile