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APAC 25 Welding Gas

A high-CO₂ argon blend primarily for flux-cored arc welding (FCAW) with gas-shielded wires. Provides deep penetration and high heat input for heavy structural work.

Gas MixtureCO₂ 25% / Ar 75%
ProcessFCAW & MIG
UN NumberUN1956
ConnectionAS 2473 Type 10
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STEEL
APAC 25
CO₂ 25% / Ar 75%

About APAC 25

APAC 25 is a high-carbon-dioxide argon blend (75% argon / 25% CO₂) built for deep penetration and high heat input. It is primarily used with gas-shielded flux-cored (FCAW) wires and for heavy structural fabrication, root runs on thick plate and out-of-position multi-pass welds, where the extra CO₂ drives penetration and helps burn through mill scale.

APAC 25 is supplied in E-size and G-size cylinders, charged to 19,000 kPa with an AS 2473 Type 10 outlet, and delivered across Melbourne. Compare the full welding range →

⚠ Main Hazards

  • Simple asphyxiant — the argon, CO₂ and oxygen in this mixture are heavier than air and can pool in pits, trenches and low or confined spaces, displacing breathable oxygen with no warning.
  • No warning properties — colourless, odourless and tasteless. The gas cannot be detected by human senses at dangerous concentrations.
  • High-pressure stored energy — cylinders are charged to 19,000 kPa. Secure cylinders upright, fit the valve cap for transport and inspect the valve before use.
  • Rapid release of gas can cause cold burns to skin or eyes on contact with escaping gas, valves or regulators.

🏭 Common Applications

🔩Flux-cored arc welding (FCAW)
🏗️Heavy structural fabrication
🔩Multi-pass welds
🏗️Root runs on heavy plate
🔩Out-of-position welding

Full Specifications

Gas MixtureCO₂ 25% / Ar 75%
Welding ProcessFCAW & MIG
Cylinder Pressure19,000 kPa
Outlet ConnectionAS 2473 Type 10
UN NumberUN1956
Dangerous Goods Class2.2 (non-flammable, non-toxic gas)
Available SizesE-size, G-size

Available Cylinder Sizes

APAC 25 is supplied in E-size and G-size cylinders. All cylinders comply with Australian Standards; dimensions are approximate.

Most popular

E-size

4.1 m³

Water capacity: 23 L
Pressure: 19,000 kPa
Height: 880 mm
Diameter: 204 mm
Weight: 40 kg

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Large / high-volume

G-size

9.3 m³

Water capacity: 50 L
Pressure: 19,000 kPa
Height: 1,510 mm
Diameter: 230 mm
Weight: 60 kg

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Storage

  • Store in a well-ventilated area
  • Keep away from heat and ignition sources
  • Store below 45°C
  • Secure cylinders upright
  • Label per Dangerous Goods Code

Handling

  • Use appropriate valve protection
  • Check for leaks before use
  • Use compatible regulators only
  • Never use oil or grease on fittings
  • Wear appropriate PPE

Emergency

  • Ventilate the area immediately
  • Stop the leak if safe to do so
  • Evacuate low or confined spaces
  • Check valve and fittings
  • Contact emergency services (000)

Safety Data Sheet (SDS) — APAC 25

Complete hazard identification, first-aid measures, firefighting and transport information for this shielding gas mixture.

Request SDS

Safety data sheets for welding mixtures are available on request and are being added to the site.

Other Steel Welding Gases

APAC 52 CO₂ 5% / O₂ 2% / Ar 93% APAC 07 O₂ 7% / Ar 93% APAC 10 CO₂ 10% / Ar 90% APAC 18 CO₂ 18% / Ar 82%

Need APAC 25 for your workshop?

Get trade pricing on E-size and G-size cylinders, delivered across Melbourne. Call 1300 123 082 or request a quote online.

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