Shielding Gas Selection; Welding Wire Selection - Linde BOC Smootharc TIG200 DC Operating Manual

2.4

Shielding gas selection

Material Shielding gas
Brass Argon
Cobalt-based alloys Argon
Copper-nickel
Argon
(Monel)
Deoxised copper
Helium
Helium(75%)/
Argon(25%)
Nickel alloys Argon
(Inconel)
Helium
Steel Argon
Helium
Magnesium Alloys Argon
Stainless steel Argon
Helium
Titanium Argon
Helium
Benefits
Stable arc
Low fume
Stable and easy to control arc
Stable and easy to control arc
Can be used for copper-nickel
to steel
Increased heat input
Stable arc
Good penetration
Stable arc
Lower penetration
Stable arc
Manual operation
High speed automated welding
Stable arc
Good penetration
High speed automatic welding
Deeper penetration
Small concentrated HAZ
Used with continuous high
frequency AC
Good arc stability
Good cleaning action
Good penetration
Good arc stability
Deeper penetration
Stable arc
High speed welding
BOC Smootharc TIG 200 DC Operating Manual
2.5

Welding wire selection

The following table includes the recommended welding consumable for
the most commonly welded materials.
Base material
C-Mn and low carbon steels
Low Alloy steels
1.25Cr/0.5Mo
2.5Cr/1Mo
Stainless Steel
304/304L
316/316L
309/309-C-Mn
321/Stabilised grades
321/Stabilised grades
Filler rod diameter (mm)
2
3
4
4 or 5
5 or 6
BOC Consumable
BOC Mild steel TIG wire
Comweld CrMo1
Comweld CrMo2
Profill 308
Profill 316
Profill 309
Profill 347
Profill 347
Thickness of metal (mm)
0.5 – 2
2 – 5
5 – 8
8 – 12
12 or more
11