Gas metal arc welding GM-308

Item code : GM-308 Description : GM-308 is a kind of welding wire with low Carbon, average Manganese

American standard : AWS ER308
 
      1. Characteristics on usage
·           GM-308 is a kind of welding wire with low Carbon, average Manganese, and a negligible amount of P and S that brings weld’s joint high durability and flexibility. Especially, high Cr and Ni content ensures that all-weld-metal can avoid rust and corrosion caused by acid; has high mechanical properties.
·           GM-308 has high fidelity and steady wire direction that makes welding process stable.
·           GM-308 is appropriate to weld Austenitic stainless steel such as E304; E305, E308. Sometimes, thanks to good mechanical quality and high durability and flexibility, GM-308 is also used in high weight and abrasion resistant structure.
·           GM-308 is welded according to semi-automatic technology with 100% Argon shielded gas ( MIG welding) that makes weld’s joint stable, not splashy much. GM-308 is appropriate for welding chemical tank, power and acid-resistant structure as well as medical devices.
        1. Typical chemical composition of (deposited) all-weld-metal (%):
 
C
Mn
Si
Cr
Ni
P
S
0.06max
1.0 ~2.5
0.65 max
19.5 ~ 21
9 ~11
0.03max
0.03max
       
        2. Typical mechanical properties of all-weld-metal
 
Shielded gas
Yield strength (Mpa)
Elongation ( % )
100% Argon
( MIG )
510 (min)
35 (min)
       
        3. Size available, recommended currents and shielding gas:
 
Size (mm)
Æ0.8
Æ0.9
Æ1.0
Æ1.2
Æ1.4
Welding current range (A)
80 ~120
90~130
100~140
110~200
140~280
Arc voltage range (V)
20 ~ 21
20~22
22~24
23~25
24~26
Shielding gas (l/min)
8 – 9
9 – 10
10 – 11
12 – 13
14 – 15
 
         4. Usage instruction.
  • Well preparation for safety before welding. Stable power.
  • Remove dirt such as oil, rust on welding objects. Clean welding area to avoid impurities and strange bodies in welding flux. Weld in accordance with the process.
  • Clean wire pipeline, adjust welding wire to ensure for stability. Do not let wire be untidy and deformed
  • When welding wire and flux mix is dirty and wet. It must be smoky, splashy, unstable. Keep in dry area, tight packing to avoid dirt, moisture. Dry welding flux at temperature of over 200OC for 40 ~ 60 minutes before welding.
View :815
Others