True to their promise of outstanding customer support and a safe supply of merchandise, Air Products has turn into a trusted associate to their clients and plays an integral position in ensuring that their manufacturing processes are efficient, cost-effective and delivers a quality end product. These solid relationships have been formed as the outcomes of a combination of unsurpassed expert and knowledgeable technical expertise from the Air Products staff. The staff at all times strives to provide customers with sound recommendation on essentially the most appropriate merchandise from Air Products’ in depth vary, to maximise their output.
According to Air Products, they have managed to position themselves as a market chief as they place an emphasis on the customer’s needs. Firstly, they aim to ensure that they have the product and the capability to produce product in accordance with the customer’s needs and assist in preventing disruptions and pointless down time. Secondly, they be sure that the customers use the proper fuel for their purposes as this reduces post-weld activities and cleaning up. Their guidance is critical to customers, as these changes eradicates accumulated costs which would possibly be typically not anticipated.
Sean Young, Air Products Welding Specialist
Back to the drafting board with Sean Young
Sean Young emphasizes the significance of protecting a molten weld pool from atmospheric contamination and oxidation, both by a flux or with a protect gasoline. A flux is utilized in shielded metallic arc (SMA) electrodes or submerged arc processes. Shielding gases, on the opposite hand, are utilized in fuel metallic arc welding (GMAW), gasoline tungsten arc welding (GTAW) and many of the flux-cored processes.
Reviewing the particular criteria related to a customer’s processes and providing steering is important. An assessment of the procedure, materials and its thickness, and the popular metallic switch ought to be conducted. Furthermore, to optimize the selection and ultimate high quality of the weld, the porosity, spatter, penetration, bead profile and fusion should be thought-about.
The function and advantages of defending gases
The most regularly used mixtures and shielding gases with respective purposes are:
Ar: used for many GTAW application and GMAW of non-ferrous supplies
CO₂: used mostly for GMAW in dip switch mode of steels
Ar/CO₂, Ar/O₂ and Ar/CO₂/O₂ fuel combination: used for GMAW of chrome steel and other steels
Ar/He and Ar/H₂ mixtures: used for superior GTAW applications
Ar/He/CO₂ and Ar/H₂/CO₂ mixtures: used for GMAW
Argon and carbon dioxide both play a core shielding function in GMAW applications as they protect the weld metallic from atmospheric oxygen or different contamination.
Young explains the difference between pure oxygen and argon in the welding process. “Pure CO₂, which is the unique shielding fuel for GMAW, is widely used for basic function welding of metal and is an effective shielding gas that prevents porosity. Due to its inclination to trigger giant droplet formation, it’s restricted in its use in the dip-transfer mode. This shielding fuel by itself causes large volumes of spatter which reduces the effectivity and arc time of the welder and increases the welder’s publish weld activities”.
Young additional explains: “Argon, then again, is usually the dominant gasoline in any shielding gasoline mixture cylinder. In its pure form, argon is an inert fuel which is purely used to keep other gases out and has no chemical effect on the deposited weld steel. Argon is utilized in virtually all GTA welding in addition to for GMAW of aluminium alloys copper, its alloys and other oxygen delicate material”.
The worth of including active gases
Adding small quantities of protecting gases may obtain improved welding outcomes, which means that the metal switch is stable, there is decreased spatter and a gentle arc. According to Young, an improved transfer stability makes the welding process less delicate to welding parameters and more tolerant to voltage and current variations. This ultimately leads to an enormous reduction in machine set-up time and a noticeable improvement in the overall productivity.
“It is essential to notice that when welding with cored wires, and the oxygen content is just too excessive, there might be an elevated threat for porosities as the additional oxygen the flux”, says Young. He explains that argon/oxygen mixtures with oxygen of up to 2% are perfect for chrome steel purposes.
To improve the penetration of carbon steel joints, CO₂ ought to be added to the argon in a two-part combine. Young comments that an increase in CO₂ increases the warmth of the welding arc, increases penetration and will increase the welding pace. เครื่องมือวัดpressure cautions that 20% CO₂ in argon should not be exceeded, as it causes spatter and instability. “It is necessary to note that 15% is optimal, and within the case of thinner materials where you don’t need penetration, 5% CO₂ is sufficient”.
Three-part mixtures– the proven benefits
It is necessary to know that a combination of protecting gases plays a role in providing the best weld properties for specific functions. Young explains that three-part mixtures include argon and CO₂ (maximum 15%) and O₂ (maximum 3%). In an instance where all three of those gases are used, arc stability is improved, penetration and bead profiles are improved, minimal spatter is generated, and metallic switch characteristics are optimised.
One factor that Young is confident about is that there are particular advantages to using three-part combination, based mostly on his experience with many customers in the business through the years.
“The three-part mixtures are extraordinarily straightforward to use, and the welding stability allows for extra variations in setting parameters. We have seen how the use of these gases have increased the standard, productiveness and efficiency, and in the end, measurable increases in profitability. Welding stability is extraordinarily essential because it has a direct impact on the entire welding costs – it is attention-grabbing to see how small improvements could make an enormous difference”.
Young concludes: “At Air Products, we try to become and remain a trusted companion to every certainly one of our prospects by providing them with one of the best solutions for their enterprise, based on our information and technical expertise. Our approach is straightforward: We determine the most appropriate gases for a customer’s processes –thereafter the shopper focuses on the effectivity of their processes while we concentrate on a safe product supply as per their specific necessities.

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