alunox is the safe choice for you. · these copper materials are therefore not weldable. types of...

ALUNOX

Schweisstechnik GmbH

Giesserallee 37a

D-47877 Willich

Tel +49 (0) 2154 94 53-0

Fax +49 (0) 2154 9453-30

www.alunox.eu

ALUNOX is thesafe choice for you.

ALUNOX is your programme: copper.

Electrode

Rod

Spool

Drum

Filler metals

Solid wires/WIG-rods • AX-CuAg 2.1211• AX-CuAl8 2.0921• AX-CuAl9Fe 2.0937• AX-CuAl8Ni2 2.0922• AX-CuAl8Ni6 2.0923• AX-CuMn13Al7 2.1367• AX-CuSi3 2.1461• AX-CuSi3A 2.1461• AX-CuSn 2.1006• AX-CuSn6 2.1022• AX-CuSn12 2.1056• AX-CuNi10Fe 2.0873• AX-CuNi30Fe 2.0837

Depending on production,

copper alloys are available

as forging or casting alloys.

They are divided into pure

copper, low alloyed up to

max. 5% and high alloyed

of more than 5% alloying

constituents. The low

alloyed are alloyed with Ag,

Mg, Zn, Pb or Si, the most

important high alloyed with

Zn (brass), Sn (bronze),

Sn+ Zn (red bronze), Ni+Zn

(nickel silver), Ni or with Al.

The oxygen content in

the copper has a decisive

influence from a technical

welding aspect. It is added

to improve the electrical

conductivity but also has

the effect of increasing the

absorption of hydrogen.

This leads to the formation

of cracks and loosening of

the structures (hydrogen

brittleness).

These copper materials

are therefore not weldable.

Types of copper used

in apparatus and tank

construction are for this

reason either molten

oxygen-free or deoxidized

with P.

Copper

Copper has long been

known as a basic material

and, because of its good

formability, became the first

metal used.

Copper can form alloys

with many metals, through

this, technical mechanical

properties such as tensile

strength, yield strength,

hardness, wear resistance

and others can be

influenced in a targeted

way.

Copper has a density of

8.9 g/ cm3 and belongs

to the non-ferrous metals.

Because of its cubic face-

centred lattice structure

(like austenitic steel) good

low temperatu re toughness

and cold workability is

present.

Copper has high electrical

and thermal conductivity

and good corrosion

resistance to many media.

Copper materials are

divided by their handling

state into:

• precipitation-hardening

• non-precipitation-

hardening materials

Precipitation-hardening

copper alloys are

practically not used for

welded constructions

because of precipitations

disadvantageous for

welding.

Welding of copper and

copper alloys

During welding copper also

tends to absorb oxygen and

hydrogen from the ambient

air. Care must therefore be

taken to ensure adequate

gas shielding.

Because of the high thermal

conductivity particularly

of the unalloyed and low

alloyed copper materials,

either the base material

must be preheated or a

high energy density welding

method must be chosen.

The level of the preheat

temperature depends on

the conductivity

of the base material and

the wall thickness.

With unalloyed copper from

3 mm preheating must be

approx. 300°C, with a wall

thickness of 15 mm approx.

500°C.

For clean and defect-

free weld seams and as

protection for the root side,

in many cases the use of

fluxes is of benefit. They

are applied before welding

onto the surface of the

workpiece, release the

oxide layers present during

heating and prevent them

reforming. Fluxes are mainly

used in gas and electric arc

welding.

Because of the high energy

density in many cases it is

possible to do without them

in shielded gas welding

processes. In TIG welding

fluxes are only still used in

exceptional cases, in MIG

welding not at all now.

In manual metal arc welding

the flux is often already

present in the coating.

With high preheat

temperatures, from approx.

300°C; flux should be used

as edge protection for the

weld zone.

Because of the high heat

expansion and the high

shrinkage of copper

materials caused by it,

sufficient tack welds or

clamp fastenings must be

used.

The TIG and MIG

processes are the main

welding processes used for

copper materials.

Gas welding is limited to

unalloyed copper, manual

arc welding only to repair

and restoration work.

The ALUNOX programme oncopper alloys.

AX-CuAg EN ISO 24373: S-Cu 1897 (CuAg1)

2.1211 AWS A 5.7: ERCuTypical analysis in % Cu P Mn AgBasis <0,05 <0,2 1,0

Product forms (per EN ISO 544)Spool Ø mm 1,0 1,2Rod Ø x

1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuAl9Fe EN ISO 24373: S-Cu 6180 (CuAl10Fe)

2.0937 AWS A 5.7: ERCuAl-A2Typical analysis in % Cu Al Ni Fe MnBasis 10,0 <1,0 1,5 <1,0

Product forms (per EN ISO 544)Spool Ø mm 1,2

AX-CuAl8Ni6 EN ISO 24373: S-Cu 6328 (CuAl9Ni5)

2.0923 AWS A 5.7: ERCuNiAlTypical analysis in % Cu Al Ni Fe MnBasis 9,0 4,5 3,5 1,3

Product forms (per EN ISO 544)Spool Ø mm 0,8 1,0 1,2 1,6Rod Ø x

1000 mm 2,0 2,4 3,2 4,0

AX-CuSi3 EN ISO 24373: S-Cu 6560 (CuSi3Mn1)

2.1461 AWS A 5.7: ERCuSi-ATypical analysis in % Cu Si Sn Fe MnBasis 3,0 0,1 0,1 1,0


1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuSn EN ISO 24373: S-Cu 1898 (CuSn1)

2.1006 AWS A 5.7: ERCuTypical analysis in % Cu Si Sn Al MnBasis 0,3 0,8 0,01 0,3


1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuSn12 EN ISO 24373: S-Cu 5410 (CuSn12P)

2.1056 AWS A 5.7: Typical analysis in % Cu Sn P FeBasis 12,0 <0,35 <0,1


1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuNi30Fe EN ISO 24373: S-Cu 7158 (CuNi30)

2.0837 AWS A 5.7: ERCuNiTypical analysis in % Cu Ni Mn Fe TiBasis 30,0 1,0 0,55 0,5

Product forms (per EN ISO 544)Spool Ø mm 1,2 1,6Rod Ø x

1000 mm 1,6 2,0 2,4 3,2 4,0

Other diameters upon request.

AX-CuAl8 EN ISO 24373: S-Cu 6100 (CuAl8)

2.0921 AWS A 5.7: ERCuAl-A1Typical analysis in % Cu Al FeBasis 8,0 0,4


1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuAl8Ni2 EN ISO 24373: S-Cu 6327 (CuAl8Ni2)

2.0922 AWS A 5.7: Typical analysis in % Cu Al Ni Fe MnBasis 8,7 2,3 1,3 1,8


1000 mm 2,0 2,4 3,2 4,0

AX-CuMn13Al7 EN ISO 24373: S-Cu 6338 (CuMn13Al7)

2.1367 AWS A 5.7: ERCuMnNiAlTypical analysis in % Cu Al Ni Fe MnBasis 8,0 2,0 2,5 13,0

Product forms (per EN ISO 544)Spool Ø mm 1,2 1,6

AX-CuSi3A EN ISO 24373: S-Cu 6560 (CuSi3Mn1)

2.1461 AWS A 5.7: ERCuSi-ATypical analysis in % Cu Si Sn Fe MnBasis 2,8 0,1 0,1 1,0


1000 mm 1,6 2,0 2,4 3,2

AX-CuSn6 EN ISO 24373: S-Cu 5180 (CuSn6P)

2.1022 AWS A 5.7: ERCuSn-ATypical analysis in % Cu Sn PBasis 6,0 0,25


1000 mm 1,6 2,0 2,4 3,2 4,0

AX-CuNi10Fe EN ISO 24373: S-Cu 7061 (CuNi10)

2.0873 AWS A 5.7: Typical analysis in % Cu Ni Mn Fe TiBasis 10,0 1,0 1,50 0,5

Product forms (per EN ISO 544)Spool Ø mm 1,2Rod Ø x

1000 mm 1,6 2,0 2,4 3,2

alunox is the safe choice for you. · these copper materials are therefore not weldable. types of...

Documents