Inert Gas WeldingSelected Reference Tables

Inert Gas WeldingSelected Reference Tables

At a glanceThis summarized compilation of reference tablesis intended as an aid to orientation in shieldinggas welding. It gives an overview of the widerange of welding inert gases and their areas ofapplication.

The tables can be helpful in the solution ofwelding problems but you should not miss out onthe experience and advice of our weldingexperts. Special information on our shieldinggases is contained in our detailed publications.For optimum control of profitability in inert gaswelding, Messer has developed a welding costcalculation system with computer aidedmeasured value processing. We are happy toplace this facility at the disposal of users onrequest.

Inert Gas Welding

Tungsten Inert Gas Welding Metal Inert Gas Welding

Non-consumable tungsten electrode consumable wire electrode

TIG Plasma MIG MAGTungsten Inert Gas Plasma- Metal Inert Gas Metal Active Gas

welding welding welding weldingOpen Confined Inert gas CO2 or O2

arc arc atmosphere in shielding gas

Shielding Gases for Welding at a glance

Product designation

Groupaccording

toDIN EN

Composition [%] Processaccording to

DIN 1910Ar He O2 CO2 H2 N2

Welding-Argon 4.6 I1 100 TIG/MIG

Argon Special 4.8 I1 100 TIG/M1G

Helium 4.6 I2 100 TIG/MIG

Alumix He90 I3 10 90 TIG/MIG

Alumix He70 I3 30 70 TIG/MIG

Alumix He50 I3 50 50 TIG/MIG

Alumix He30 I3 70 30 TIG/MIG

Alumix N S I1 balance 0,015 TIG/MIG

Alumix He15 N S I3 balance 15 0,015 TIG/MIG

Alumix He30 N S I3 balance 30 0,015 TIG/MIG

Alumix He50 N S I3 balance 50 0,015 TIG/MIG

Inoxmix H2 R1 98 2 TIG

Inoxmix H5 R1 95 5 TIG

Inoxmix H7 R1 92,5 7,5 TIG

Inoxmix N1 SI1 98,75 1,25 TIG

Inoxmix N2 SI1 97,5 2,5 TIG

Inoxmix He15 N1 SI3 83,75 15 1,25 TIG

Inoxmix He3 H1 R1 95,5 3 1,5 TIG

Inoxmix X2 M13 98 2 MAG M

Inoxmix C2 M12 97,5 2,5 MAG M

Inoxmix He15 C2 M12(1) 83 15 2 MAG M

Inoxmix He30 H2 C M11(1) balance 30 0,12 2 MAG M

Ferromix C8 M21 92 8 MAG M

Ferromix C18 M21 82 18 MAG M

Ferromix C25 M21 75 25 MAG

Ferromix X4 M22 96 4 MAG M

Ferromix X8 M22 92 8 MAG M

Ferromix C5 X5 M23 90 5 5 MAG M

Ferromix C15 X5 M24 80 5 15 MAG M

Ferromix He20 C8 M21(1) 72 20 8 MAG Mcarbon dioxide(industrial grade) C1 100 MAG C

Forming gas(N2-H2-mixes)

F2 5-25 95-75 Rootprotection

Areas of Application

Standard Shielding Gases and their Application in TIG Welding

Product Typical Mixes Group acc.DIN EN 439 Application

Welding Argon l1 High alloy and mild steels, aluminum alloys,other non ferrous metals

Inoxmix H 2 % H2 R1 Austenitic CrNi steels5 % H2 R1 (5% and 7.5% preferably fully mechanical)

7,5 % H2 R1Inoxmix N 1,25 % SI1 Duplex, super-duplex

2,5 % SI1 fully austenitic CrNi steels15 % He,1,25 % N2 SI3

Helium 4.6 I2 Aluminum (negative polarity welding)Steels (orbital technique)

Alumix He 30 % He I3 Aluminum, copper (preferably 70% He)50 % He I3 Nickel (preferably 30% He)70 % He I3 Steels (orbital technique)90 % He I3 TIG DC welding

(preferably 90% He)

Alumix N 0,015 % N2 Sl1 Aluminum + Al - alloysAlumix He N 15 % He, 0,015 % N2 SI3 Aluminum + Al - alloys

30 % He, 0,015 % N2 SI3

50 % He, 0,015 % N2 SI3

Argon 4.8 I1Gas sensitive materials such as titanium,niobium, molybdenum, tantalum, as well asfor root protection

Forming gas 5 % H2 F2 Root protection for high(N2-H2 mixes) 10 % H2

alloy and alloyed steels

15 % H2

20 % H2

25 % H2

Standard Shielding Gases and their Application in MIG Welding

Product Typical Mixes Group acc.DIN EN 439 Application

Alumix He 30 % He I3 Aluminum, nickel alloys50 % He I3 CuNiFe alloys, copper70 % He I3 Aluminum materials

Alumix N 0,015 % N2 SI1 Aluminum + Al - alloysAlumix He 15 N 15 % He, 0,015 % N2 SI3 Aluminum + Al - alloysAlumix He 30 N 30 % He, 0,015 % N2 SI3Alumix He 50 N 50 % He, 0,015,% N2 SI3Inoxmix H 30 H 2 15 % He, 2 % H2 SR1 Nickel-based materials

0,12 % CO2

Helium 4.6 I2 Copper (if preheating not possible)

Applications for MAG Welding

Product Families for MAG Welding

Product family Application

Inoxmix high alloy steels, conditionally mildsteels

Ferromix mild steels, conditionally high alloysteels

Classification of shielding gases for MAG welding according to DIN EN 439 and their applications

Group acc.DIN EN 439 Code number

Components [%]

CO2 O2 Ar H2

M1 1 > 0 to 5 - Balance > 0 to 5 High alloy2 > 0 to 5 - Balance - steels3 - > 0 to 3 Balance -4 > 0 to 5 > 0 to 3 Balance -

M2 1 > 5 to 25 - Balance - Mild and alloyed2 - > 3 to 10 Balance - steels3 > 0 to 5 > 3 to 10 Balance -4 > 5 to 25 > 0 to 8 Balance -

M3 1 > 25 to 50 - Balance -2 - > 10 to 15 Balance -3 > 5 to 50 > 8 to 15 Balance -

C 1 100 - - -

M: Mixed gas, C: Carbon dioxide/CO2

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47803 KrefeldTel. +49 2151 7811-0

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Cost Comparison

Shielding gas Shielding gas

70 % Helium / 30 % Argon 100 % Argon

€2.50 €2.25 €0.50 €0.50

€1.00 €0.50 €0.75

Labor cost Wire Gas Labor cost Wire Gas Edgepreparation

2,25 EUR / unit 5,75 EUR / unit

Penetration Intensification

20 mm

100 % Argon 70 % Argon 50 % Argon 30 % Argon 100 % Helium30 % Helium 50 % Helium 70 % Helium

Base material: AI Mg 4,5 MnWelding current: 240 ASheet thickness: 20 mm

09/05 / 1.EN1.205