ARGON GAS (Ar)

Have you heard of argon gas but are unsure of its applications? Viet Nga Specialty Gases Joint Stock Company provides insights into its properties and uses.

1. Properties of argon gas

Argon (Ar) is the most abundant noble gas on Earth, comprising 0.934% of the atmosphere.

It is 2.5 times more soluble in water than nitrogen and approximately as soluble as oxygen. Argon is chemically stable, colorless, and odorless in both gaseous and liquid states.

Very few argon compounds are known, which historically led to its classification as an inert gas. While stable argon-water clathrates can form under certain conditions, and theoretical studies suggest the possibility of stable argon compounds, practical synthesis remains undetermined.

2. Basic characteristics of argon gas

• Main hazard: Asphyxiation and high-pressure cylinder risk

• Explosion limit: None

• Flammability: Non-flammable

• Odor: None

• Molecular weight: 39.95 g/mol

• Specific volume at 20°C: 0.601 m³/kg

• Relative density (Air = 1) at 20°C: 1.38

• Critical temperature: -122.4°C

• Critical pressure: 48.34 bar

3. Applications of argon gas

• Heat treatment: Provides a protective atmosphere for metals sensitive to oxidation or air exposure.

• Inerting and purging: Used to clean tanks and pipelines in pharmaceutical and chemical industries.

• Metal refining

• Semiconductor industry applications

• Welding: In pure or mixed form, argon shields molten metal from contamination.

• Plasma cutting: For ferrous and non-ferrous metals, pure argon is applied at high temperatures.

4. Purity grades of argon gas

Depending on the application, the following purities are available:

• Ar 4.0 (99.99%): For welding, cutting, and pipeline purging

• Ar 4.5 (99.995%): For higher-purity welding and cutting

• Ar 5.0, 5.2, 5.5 (99.999% – 99.9995%): For research laboratories, hospitals, and analytical centers

5. Argon production and storage

Modern argon production primarily involves cryogenic air liquefaction and fractional distillation, separating argon from oxygen and nitrogen. It can also be collected from steel plant byproducts or ammonia production exhaust gases.

Argon gas is stored and transported in:

• 40 L steel cylinders at 150 bar

• 50 L cylinders at 200 bar

• Cryogenic trailers at 15–20 MPa and 20°C

6. Reliable argon gas supplier

The market is saturated with counterfeit argon products and unsafe cylinders, causing safety concerns. Viet Nga Specialty Gases Joint Stock Company guarantees authentic industrial gases, including helium, oxygen, and argon, with proven safety and reliability, trusted by numerous organizations and enterprises.

Contact us today to purchase high-quality argon gas at the best market price.