True to their promise of outstanding customer support and a secure provide of products, Air Products has turn out to be a trusted associate to their prospects and plays an integral function in ensuring that their production processes are environment friendly, cost-effective and delivers a quality finish product. These solid relationships have been fashioned as the result of a mix of unsurpassed skilled and educated technical expertise from the Air Products staff. The group at all times strives to supply clients with sound recommendation on probably the most appropriate merchandise from Air Products’ intensive vary, to maximize their output.
According to Air Products, they have managed to position themselves as a market leader as they place an emphasis on the customer’s needs. Firstly, they aim to guarantee that they’ve the product and the capability to supply product in accordance with the customer’s wants and help in stopping disruptions and unnecessary down time. Secondly, they make positive that the customers use the correct fuel for his or her functions as this reduces post-weld actions and cleaning up. Their guidance is important to customers, as these modifications eradicates amassed prices which are typically not anticipated.
Sean Young, Air Products Welding Specialist

Back to the drawing board with Sean Young

Sean Young emphasizes the significance of protecting a molten weld pool from atmospheric contamination and oxidation, either by a flux or with a protect gas. A flux is utilized in shielded metallic arc (SMA) electrodes or submerged arc processes. Shielding gases, on the other hand, are utilized in gas steel arc welding (GMAW), fuel tungsten arc welding (GTAW) and a lot of the flux-cored processes.
Reviewing the precise criteria associated to a customer’s processes and offering steering is essential. pressure gauge of the process, materials and its thickness, and the preferred metallic transfer must be performed. Furthermore, to optimize the selection and ultimate high quality of the weld, the porosity, spatter, penetration, bead profile and fusion ought to be thought of.
The position and advantages of protecting gases

The most regularly used mixtures and shielding gases with respective applications are:
Ar: used for most GTAW application and GMAW of non-ferrous materials

CO₂: used largely for GMAW in dip switch mode of steels

Ar/CO₂, Ar/O₂ and Ar/CO₂/O₂ gas mixture: used for GMAW of stainless-steel and other steels

Ar/He and Ar/H₂ mixtures: used for advanced GTAW functions

Ar/He/CO₂ and Ar/H₂/CO₂ mixtures: used for GMAW

Argon and carbon dioxide both play a core shielding function in GMAW functions as they shield the weld steel from atmospheric oxygen or other contamination.
Young explains the difference between pure oxygen and argon within the welding course of. “Pure CO₂, which is the original shielding gasoline for GMAW, is widely used for general objective welding of metal and is an efficient shielding gas that stops porosity. Due to its inclination to trigger giant droplet formation, it is restricted in its use in the dip-transfer mode. This shielding gasoline by itself causes giant volumes of spatter which reduces the effectivity and arc time of the welder and will increase the welder’s publish weld activities”.
Young additional explains: “Argon, then again, is mostly the dominant gasoline in any shielding gas mixture cylinder. In its pure kind, argon is an inert gas which is purely used to maintain different gases out and has no chemical effect on the deposited weld metallic. pressure gauge octa is utilized in nearly all GTA welding in addition to for GMAW of aluminium alloys copper, its alloys and other oxygen delicate material”.
The value of including active gases

Adding small quantities of defending gases could obtain improved welding results, which means that the metallic transfer is secure, there is lowered spatter and a delicate arc. According to Young, an improved switch stability makes the welding process less delicate to welding parameters and extra tolerant to voltage and present variations. This finally results in an enormous discount in machine set-up time and a noticeable enchancment within the overall productivity.
“It is essential to notice that when welding with cored wires, and the oxygen content is merely too excessive, there might be an increased risk for porosities as the additional oxygen the flux”, says Young. He explains that argon/oxygen mixtures with oxygen of as much as 2% are good for chrome steel functions.
To enhance the penetration of carbon metal joints, CO₂ should be added to the argon in a two-part mix. Young feedback that a rise in CO₂ increases the heat of the welding arc, increases penetration and will increase the welding pace. He cautions that 20% CO₂ in argon should not be exceeded, because it causes spatter and instability. “It is important to note that 15% is perfect, and in the case of thinner materials where you don’t need penetration, 5% CO₂ is sufficient”.
Three-part mixtures– the proven benefits

It is important to know that a combination of shielding gases performs a task in providing one of the best weld properties for specific applications. Young explains that three-part mixtures encompass argon and CO₂ (maximum 15%) and O₂ (maximum 3%). In an occasion where all three of those gases are used, arc stability is improved, penetration and bead profiles are improved, minimal spatter is generated, and metal transfer traits are optimised.
One thing that Young is confident about is that there are particular benefits to using three-part combination, primarily based on his experience with many purchasers in the business over the years.
“The three-part mixtures are extremely simple to make use of, and the welding stability allows for more variations in setting parameters. We have seen how the utilization of these gases have elevated the standard, productivity and effectivity, and ultimately, measurable increases in profitability. Welding stability is extremely necessary as it has a direct impression on the entire welding prices – it is fascinating to see how small improvements can make a giant difference”.
Young concludes: “At Air Products, we try to turn out to be and stay a trusted partner to every considered one of our clients by providing them with one of the best solutions for his or her business, based on our knowledge and technical expertise. Our strategy is simple: We determine the most appropriate gases for a customer’s processes –thereafter the customer focuses on the efficiency of their processes whereas we give consideration to a safe product supply as per their particular necessities.