Copper alloys of MMG for special castings

Due to the gigantic dimensions of a propeller and the extreme loads during operation MMG uses high-quality raw material. Main component of each ship propeller is copper. Additionally other metals in variable proportions are used – exactly aligned with the specific intended use. High-quality metals, the dosage of which is strictly controlled, guarantee the high quality of the alloy.

MMG offers its customers the entire line-up of copper alloys in ship building approved by the classification societies.

  • Alloys
  • CuNiAl alloys
  • Special brass
  • CuMnAl alloys
  • Special alloys

 

Decades of experience in casting and machining go along with extensive internal research activities. This research was and is carried out in close consultancy with our customers and the classification societies. All this makes MMG a competent and worldwide accepted manufacturer of all copper alloys used in propeller manufacturing.

Cu3 NI-AL-Bronzen

Cu3 Nickel-Aluminium-Bronze CuAl10Ni F590

Chemical
composition.
Mechanical
properties
(Minimum values)
Other
physical
properties
Alloying
elements

%
Other
elements

%
0,2 %
Proof
stress
Rp 0,2
MPa
Tensile
strength
Rm
MPa
Elon-
gation
A5
%
Brinell
Hard-
ness
HBW
Density

kg/dm3
Perme-
ability
relativ

Cu Rest

Al 8,5- 11,0

Mn 1,0 - 3,0

Fe 3,5 - 5,5

Ni 4,0 - 6,0



max. 0,8

davon:

Zn 0,5

Sn 0,1

Si 0,1

Mg 0,05

Pb 0,03

245

590

16

140

7,6

1,4...2,0

Details

MMG copper alloys for centrifugal casting

In our foundry copper is the base metal respectively main component. During the process of melting one or more components are added. Based on the number of components of an alloy, it is called binary, ternary, quaternary or complex alloy. 

Concerning the classification of our alloys, only those components are included in the designation which decisively define the characteristics of an alloy type.

European Material Number System

Excerpt of the used alloys

Position / Meaning / Classification / Examples
123456
Consignation of the base materialKind of manufacturing or usageConsecutive numbers of the respective material groups from 000 to 999Letter for the consignation of the material group
C = CopperB = Ingot Metal C= Casting Product F= Welding Consumable / Materials M= Master Alloy R= Refined Copper as rough material S= Scrap W= Dispersing Material X= not standardized materialsA or B = copper, clean
C or D = Copper, less than 5% alloy elements
G=Copper-Aluminium- Alloy
K= Copper-Tin-Alloy
N or P= Copper-Tin-Lead-Alloy
L or M= Copper-Zinc-Alloy, Binary Alloy
R or S =  Copper-Zinc-Alloy, Complex Alloy
J = Copper-Nickel-Alloy
CC333G

 

Examples:    CB764S                    Copper-Ingot Metal-764-Kupfer-Zinc-Alloy,
                Complex Alloy            CuZn34Mn3Al2Fe1-B

                CC333G                     Copper-Casting Product-333-Copperr-Aluminium-
                Alloy                   -->CuAl10Fe5Ni5-C-GZ

 

Description of the casting method

GZ Centrifual CastingGM Permanent Mould CastingGS Sand CastingGC Strand CastingGP Pressure Die Casting
Details
Alloy typeimportant characteristics
Copper-Aluminium-Alloy 
  • high corrosion resistance, also to aggressive mediums
  • very good mechanical characteristics for construction materials 
  • good weld able
Copper-Tin-Alloy

  • good sliding and construction material
  • high abrasion resistance with protection of the opposite material at the  same time (material pairing)

 

Copper-Tin-Lead-Alloy
  • extremely good sliding material at medium hardness and good lubrication characteristics
Copper-Zinc-Alloy

Alloy group with the most versatile characteristics,

  • from soft to highly compact materials
  • ighg abrasion resistance at moderate sliding behaviour
  • higher electrical conductivity and heat conductivity adjustable
  • high corrosion resistance at alpha-brass
  • good behaviour at low temperatures

Copper-Nickel-Alloy

  • excellent resistance to sea water, ammoniam chlorine and salt
  • good weldable
  • insensitive to tension crack corrosion

 

 

copper-aluminium-alloy

CuAl9-C-GZ (CC330G) according to DIN EN1982

Material characteristics Chemical composition* Special characterictics**
Tensile strength
Rm
N/mm2
min.
0,2% Proof stress
Rp 0,2
N/mm2
min.
Elongation
A5
%
min.
Brinell Hardness
HBW

min.
450 160 15 100 Cu 88,0..92,0;
AL 8,0..10,5;
Fe ---..1,2;
Ni ---..1,0;
Construction material with low permeability

Advise for application: for parts with low magnetizability. parts of motors, parts of stern tubes and propellers, heat changer, sea water pumps

* Chemical composition according to EN 1982

** Remarks: all alloys are resistant against corrosion and sea water

 

 

CuAl10Fe2-C-GZ (CC331G) according to DIN EN1982

Material characteristics Chemical composition* Special characteristics**
Tensile strength
Rm
N/mm2
min.
0,2% Proof stress
Rp 0,2
N/mm2
min.
Elongation
A5
%
min.
Brinell Hardness
HBW

min.
550 200 18 130 Cu 83,0..89,5;
AL 8,5..10,5;
Fe 1,5..3,5;
Ni ---..1,5;
Construction material, only small temperature dependency between -200 °C and + 200 °C

Advise for application: mechanical stressed parts, crank, housings, bushings, gear pinion and bevel gear wheel, switching segments and shifting fork.

* Chemical Compostion according to EN 1982

** Remarks: all alloys are resistant against corrosion and sea water

Details