Eliminate the Use of Helium for GTAW on Stainless Steel - QuickView
QuickViewQuickView Eliminate the use of Helium in GTAW Applications on Stainless Steel Improve Productivity & Quality; Reduce Total Cost MATHESON QuickView Application Review and Summary
QuickViewQuickView Helium Supply Update • Helium is a non-renewable resource • Helium supply is subject to variability – Helium prices fluctuate … and the future is unpredictable • For welding applications, alternatives to helium exist – Many of the alternatives offer advantages Now is the time to consider shielding gas alternatives that use less - or zero - helium.
QuickViewQuickView Why use Helium? • Helium creates a high energy arc – High ionization potential (24.5874 eV) – Produces hotter arc (at higher voltages) • Produces a shallower, wider bead profile – Effect is proportional to Helium concentration • High heat can be advantageous on thicker sections • Helium can be useful on aluminum, magnesium, copper alloys • Helium when blended with Argon, CO2, and other gases, creates a mixture with blended characteristics Frequently Specified Application: Mixtures rich in Helium – typically 90% - for Stainless Steel
QuickViewQuickView Helium’s Disadvantages • Helium’s high ionization potential leads to: – Less stable arc – can lead to inconsistent results Disadvantages are proportional – Hotter arc – can lead to distortion & warping to Helium concentration • Helium can lead to penetration issues • Helium can increase spatter • Helium is a light atom and a less effective shield – Helium flow rate per unit of deposited metal is higher than other gases • Helium is subject to supply and price variability – The cost of Helium must be considered in high production applications Using more He is not the only choice; and is often not the best choice.
QuickViewQuickView GOAL: Reduce or Eliminate Helium Use • Alternatives to Helium exist • Helium use can be reduced Consider mixtures or eliminated optimized for the • With excellent results: process and – Better weld penetration application. – Significant reduction in porosity – Increased travel speed – Improved arc stability; less spatter and smoke – Improved puddle and flow control (smaller droplet) – Reduced Heat Affected Zone (HAZ) – Less heat-related damage to base material – Reduced burn-through on thin materials – More flexibility to use other processes (spray and pulsed spray, in addition to short circuit)
QuickViewQuickView Stainless Steel GTAW • MATHESON Select® H-3 – Uses no Helium – uses Hydrogen in Argon – Concentrated heat transfer – Focused arc • Excellent control • Reduced burn through, suck-back • Reduced HAZ • Reduced distortion
QuickViewQuickView Stainless Steel GTAW • Advantages of MATHESON Select® H-3 – Good wetting; high travel speeds – Hydrogen reduces oxides for excellent color matching – Higher productivity and lower total welding cost – Ideal for use as a backing gas – Ideal for narrow welds • as small as 1/16 inch
QuickViewQuickView Other Solutions for Stainless Steel
QuickViewQuickView Stainless Steel Welding • For GMAW on Stainless Steel • Why use two setups? – 90%He / 7.5%Ar / 2.5%CO2 for Short Circuit – 98%Ar / 2%O2 for Spray • A single setup handles Short Circuit, Normal Spray, and Pulsed Spray: – Matheson Select® HC-725 • Wider voltage range, less heat • 90% less Helium than mixtures containing 90%He • ** See our other QuickView: ** Reducing Helium Use for GMAW on Nickel-Based Alloys
QuickViewQuickView In Review … • Forward thinking leads to better solutions • Use of less or 0% Helium can lead to: – Better results Thank you – Improved cost per weld for your – time! Better control for all welds – Easy handling for narrow welds – The use of ONE SETUP for all applications on SS • Easily applied in GMAW and GTAW on Nickel-Based alloys • We are here to support you • Learn more: contact your MATHESON rep or visit one of our stores • Find us fast at: www.MathesonGas.com/contactus.aspx