Shielding gases have been primarily developed for protecting the weld. The development of shielding gases and the optimization of the welding process has, unfortunately, meant an increase in the amount of ozone created in connection with gas shielded arc welding.
We have developed MISON® shielding gases which keep the ozone content low while maintaining optimal performance. MISON® is the name of shielding gases that improve the working environment and provide the optimal result for each welding application. With MISON® shielding gases you can achieve the best possible welding result.
Why is it so important to eliminate ozone?
Ozone is a strongly oxidizing gas. According to EEA (European Environmental Agency), an environmental body within the EU, ozone is dangerour to health. Typical symptoms of short-term ozone exposure include eye and throat irritation, coughing, inflammation of the lungs and breathing difficulties.
According to EEA, the body quickly recovers from exposure to excessive ozone contents, but repeated exposure can cause permanent damage to lung tissue. The limit for a hygienic level (the highest acceptable average content of a substance in breathing air during a working day) is as low as 0.1 ppm, or 0.00001%. Even contents below this limit can cause symptoms in sensitive persons, e.g. asthmatics.
How does MISON® work?
Common to all MISON® shielding gases is the fact that they contain a carefully weighted additive of nitrogen monoxide which effectively reacts with ozone, forming oxygen and nitrogen dioxide. MISON® shielding gas attacks the problem directly at the source, i.e. the ozone disappears as soon as it is formed. More than 20 years of experience have shown that the welder’s working environment is considerably improved with the effective reduction in ozone content. Independent surveys have shown that MISON® shielding gas effectively reduces the ozone content of the ambient air.
MISON® shielding gases are an example of how you can achieve a cleaner and better working environment without jeopardizing productivity or quality. An improved working environment can also lead to increased productivity due to fewer interruptions and absences from work caused by illness or injury.
Right gas for each application
MISON shielding gases can be supplied in different forms to suit different requirements. Shielding gases for welding are divided into different groups based on their properties in accordance with EN ISO 14175. Read more about the marking and grouping of shielding gases in accordance with EN ISO 14175.
MISON shielding gases are a modern and comprehensive protective gas program, but there are also other shielding gases for gas arc welding which can in certain cases provide unique advantages.
MISON® 8
Ar + 8% CO
2 + 0,03% NO
- Used for MAG welding of unalloyed and low-alloyed steel with solid wire electrodes or metal powder cored wire electrodes
- Intended primarily for spray-arc and pulse welding
- Provides high welding speed with little spray and surface slag
- Best choice for highest possible productivity in robotized or mechanized welding as well as in high productive MAG welding (RAPID PROCESSING).
- High-energy welding generally produces considerably higher amounts of ozone, which is why it is especially beneficial to use an ozone-reducing shielding gas such as MISON® 8
- Marking EN ISO 14175-Z-ArC+NO-8/0.03. Corresponding to Group M20
- Valve thread W 24.32 x 1/14" H exterior
MISON® N2
Ar + 1,8 N
2 + 30% He + 0,03% NO
- Used for TIG welding of duplex stainless steel and other nitrogen-alloyed stainless steel, e.g. super austenitic steel.
- Nitrogen in the shielding gas limits nitrogen losses in the weld pool, affording improved corrosion resistance and strength properties
- Can also be used for MIG welding of super austenitic and super duplex steel
- Helium increase the fluidity of the melt
- Eliminates damaging ozone formation in connection with welding
- Marking; EN ISO 14175-Z-ArHeN+NO-30/1.8/0.03. Corresponds to Group N2
- Valve thread W 24.32 x 1/14" H exterior
MISON® 2
Ar + 2% CO
2 + 0,03% NO
- Intended for MAG welding of stainless steel and especially for normal austenitic steel (AISI 304 and 316), ferritic steel as well as duplex steel of standard quality
- Suitable for welding with short arc, spray arc or pulsed arc
- Little spray and surface slag, good penetration and a smooth weld
- Eliminates damaging ozone formation in connection with welding
- Marking; EN ISO 14175-Z-ArC+NO-2/0.03. Corresponds to Group M12
- Valve thread W 24.32 x 1/14" H exterior
MISON® H2
Ar + 2% H
2 + 0.03% NO
- Used for TIG welding of austenitic and super austenitic stainless steel, as well as nickel-based alloys
- Hydrogen creates a hotter and more concentrated arc, which means higher welding speed, improved penetration and better transition between weld reinforcements and the base material
- Reduces the formation of surface oxides
- Eliminates damaging ozone formation in connection with welding
- Marking; EN ISO 14175-Z-ArH+NO-2/0.03. Corresponds to Group R1
- Valve thread W 24.32 x 1/14" H exterior
MISON® 25
Ar + 25%CO
2 + 0.03% NO
- Used for MAG welding of unalloyed and low-alloyed steel with solid wire electrodes or flux cored wire electrodes
- In connection with short arc welding produces a weld pool which is easy to control
- Tolerates impurities on the weld surface better than other mix gases with regard to spray arc welding
- Creates little spray, smoother weld and higher welding speed than pure carbon dioxide
- The most oxidizing gas of the mixed gases, creates the most slag
- Recommended particularly for short arc welding
- Eliminates damaging ozone formation in connection with welding.
- Marking; EN ISO 14175-Z-ArC+NO-25/0.03. Corresponds to Group M21
- Valve thread W 24.32 x 1/14" H exterior
MISON® 2He
Ar + 2% CO
2 + 30% He + 0.03% NO
- Designed for MAG welding of the majority of austenitic steels (AISI 304 and 316), ferritic steel as well as duplex steel of standard quality
- Suitable for welding with short arc, spray arc or pulsed arc
- Creates little spatter and surface slag and provides improved penetration and smoother welds
- Good for welding in larger material thicknesses
- Suitable also for MIG soldering of galvanized steel
- Eliminates damaging ozone formation in connection with welding
- Marking; EN ISO 14175-Z-ArHeC+NO-30/2/0.03. Corresponds to Group M12
- Valve thread W 24.32 x 1/14" H exterior
MISON® He30
Ar + 30% He + 0.03% NO
- Specially produced for TIG and MIG welding of aluminum
- More stable arc compared with other helium mixtures
- Increased penetration and smoother welds compared to gases without helium
- Enables increased welding speed and thereby less weld distortions
- Also used for TIG welding of other materials, e.g. stainless steel, unalloyed and low-alloyed steel as well as copper. Should not be used as a root protection gas
- Provides a better working environment through reduced ozone content.
- Marking; EN ISO 14175-Z-ArHe+NO-30/0.03. Corresponds to Group I3
- Valve thread W 24.32 x 1/14" H exterior
MISON® 18
Ar + 18% CO
2 + 0,03% NO
- Intended for MIG welding of unalloyed and low-allowed steel with solid wire electrodes as well as flux-filled and metal cored wire electrodes.
- With certain limitations the gas is also suitable for pulsed welding and as for use as a shielding gas in the welding of stainless steel with rutile flux-filled cored wire electrodes.
- Provides smooth welds with little spray with both short arc and spray arc.
- Often suitable as a general shielding gas in less demanding conditions.
- Eliminates damaging ozone formation in connection with welding
- Marking; EN ISO 14175-Z-ArC+NO-18/0.03. Corresponds to Group M21…
- Valve thread W 24.32 x 1/14" H exterior
MISON® Ar
Ar + 0.03% NO
- Used for TIG welding of most metals and alloys
- Provides a stable arc which is easy to ignite
- Also used for MIG welding of aluminum and high-alloyed stainless steel, such as super duplex and super austenitic stainless steel
- Can also be used for copper and nickel-based alloys
- Also recommended for MIG soldering of galvanized steel
- Should not be used as a root protection gas
- Marking; EN ISO 14175-Z-Ar+NO-0,03. Corresponds to Group I1
- Valve thread W 24.32 x 1/14" H exterior