Mig Welding Wire
307-Si

Classifications
DESCRIPTIONS Stainless Steel
AWS AWS A5.9
 
Mechanical Properties
TENSILE 710 MPa
YIELD 470MPa
ELONGATION 42%
IMPACTVALUE 120J
Min Tensile 500 N/mm²
Min Yield Strength 350 N/mm²
Min Elongation 25%
HARDNESS 20 HRc
amp10 160-220
amp12 200-270
Pack Size 12,5Kg
Shield Gas Ar + 2% O2 or Ar = 2-3 % CO2
Heat Input Max. 2.0 kj/mm
Scaling Temperature Approx. 850ºC (air)
Corrosion Resistance Primarily intended for stainless to mild steel connections. However, the corrosion resistance corresponds to that of ASTM 304.
Chemical Analysis
Carbon 0.09
Manganese 7.0
Silicone 0.8
Chromium 19.0
Nickel 8.0

Welding Position

Characteristics
307-Si is an over-alloyed fully austenitic consumable for welding stainless steel to mild steel, low alloyed or Mn steels.

Procedures
When welding stainless steel to unalloyed or low alloyed steels, it is advisable/necessary to reduce the dilution of the weld as much as possible. Welding should therefore be performed with a limited heat input and approriate bevel angle.Shielding gas recommendations: Ar + 2% O2 or Ar + 2-3% CO2. The addition of O2 or CO2 provides good arc stability. Welding can also be performed using an addition of 30% helium (He) which will also increase the energy of the arc. The fluidity is hereby improved and the weld is generally wider. The welding speed can therefore be increased. Addition of He will increase the blackening slightly. Gas flow rate: 12-16 l/min.