How Much is Welding Gas

If you have plans to do any type of welding or you are someone who may need to buy welding gas in the future, you may be interested to learn how much does welding gas cost. The average cost of welding gas has been steadily increasing over the past 10 years. In 2010, the cost was $2.48 per gallon. Today, the average is $3.13 per gallon. The metal prices (iron, stainless steel, etc) are also increasing. The metal prices affects the cost of welding gas, as the cost of iron is $2.00 per pound, and the price of stainless steel is $0.83 per pound. Welding gas prices are only expected to continue to rise over time.

Purpose of Welding Gas

Purpose of Welding Gas

Gases are employed in welding for a variety of purposes, the most important of which is to protect the arc from pollutants in the air, such as dust or other gases. It can also be used to keep the weld clean and to heat metals. Welding gases are divided into two types: inert and reactive. Inert gases do not change their properties when they come into contact with other substances or temperatures, and they remain unchanged throughout the welding process. These aid in the welding of metals without causing the weld to weaken or deform. Reactive gases, on the other hand, react to the circumstances in which they find themselves – they create change while also changing themselves. These can be beneficial because they improve the way metal is fused by introducing positive alterations.


The cost of gas can vary substantially depending on the size of the cylinder and the type of gas purchased, reaching as high as $350 per cylinder. Argon gas is often more expensive than other gases due to the difficulties in collecting it. You can also get your gas cylinder replenished rather than purchasing a new one. This method is substantially less expensive than purchasing new cylinders. It will be more affordable and cost-effective to refill a larger cylinder with a higher volume than it will be to refill many smaller cylinders.

The costs of purchasing and exchanging various types of welding cylinders are listed below.

  • A new R cylinder (20 cubic feet) would set you back around $112, with gas costing a further $18. It costs $16 to replace these cylinders.
  • A new Q cylinder (90 cubic feet) will set you back roughly $ 212, while gas will set you back $33. You’ll have to pay $30 for an exchange.
  • A new M cylinder (132 cubic feet) will cost around $232, with gas costing around $39. The cost of an exchange will be $36.
  • You should expect to pay around $112 for a new MC Acetylene cylinder (10 cubic feet) and $29 for the gas. The cost of an exchange is $26.
  • A 40-cubic-foot B Acetylene cylinder costs $133, and the gas is $35. You’ll be charged around $32 for an exchange.
  • The cost of a new 10-pound carbon dioxide cylinder is $145, and the cost of gas is $28. The cost of an exchange will be $26.
  • The cost of a new 20-pound carbon dioxide cylinder is roughly $231, and the cost of the gas is $32. The cost of an exchange is $30.

Gases Used in Welding

Welding requires a wide assortment of gases. Welding is a type of metalworking process that uses high heat to join pieces of metal together. Heat is used to melt and fuse the pieces of metal so that they become a solid piece. Heating the metal changes it into a new state. This process also changes the composition of the metal. Welders use different types of gas to adjust and control the properties of the metals. Welders use gases like oxygen, argon, nitrogen, and hydrogen to weld metals.


Despite its benign and quiet reputation, oxygen is one of the most reactive gases. When welding, the gas is frequently combined in tiny volumes with other shielding gases like argon. The combination speeds up the welding process and gives the molten metal more fluidity. Oxygen is also used to enhance heat during gas welding and for oxy-cutting, which is the technique of cutting metals with oxygen. Welders like to combine oxygen and acetylene to achieve the greatest temperature possible, which is ideal for welding heavy metals like steel.

Gases Used in Welding

Carbon dioxide

Welders utilise carbon dioxide as a shielding gas in their mixes. Because the gas is made from biological materials, it is very cost-effective to utilise. However, the quality of these welds does not compare to that of argon. MIG welding, flux core welding (check out the difference between tinning and flux core welding), and plasma shielding all employ carbon dioxide.


Nitrogen is a common gas that is used in welding as a shielding gas. It is necessary in gas welding because it improves the mechanical properties of the alloy and deepens the penetration. The gas is also employed to keep the arc stable.


Argon is a non-flammable inert gas that is used as a shielding gas to keep air out of the welding arc. The gas is also utilized in the initial phases of welding and for purging. In MIG welding, welders like to use argon in large volumes as a shielding gas. Have a look at the detailed difference between TIG and MIG welding.


When hydrogen is blended with other shielding gases like argon, it can be utilised as a shielding gas. Because of its reactivity, the gas is normally utilised in modest amounts to avoid any hazard. The gas is beneficial because it improves penetration and results in clean welds.


There are a lot of welding gas suppliers on the market, so welders should be cautious and only buy from approved merchants. To minimise unwanted leaks or getting half-filled cylinders, make sure you get a well-sealed cylinder when purchasing or refilling.

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