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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country VDA 231-106 classification Application temperature [°C]
CW702R (DIN EN 1652 : 1998-03) CuZn20Al2As CW702R DIN EN 1652 : 1998-03 Supersedes DIN 17670-1 : 1983-12, DIN 17670-2 : 1969-06, DIN 1751 : 1973-06, DIN 1791 : 1973-06 Valid Germany 3.2 -10 - 250 1)
1) Remark: CuZn20Al2As (CW702R former identification: CuZn20Al2) is an unhardenable copper alloy. High hardness and strength values are achievable by cold forming only. Strength properties, corrosion resistance and oxidation resistance are increasable by Al-addition. CuZn20Al2As is seawater and dezincification resistant, and insensitive to stress corrosion in stress-relieved condition. Processing properties: warm forming: moderately cold forming: moderately machinability: moderately hard soldering: moderately soft soldering: unfavorable TIG-welding: good burnishing: very good The material is predominantly suitable for smooth and ribbed tubes and for heat-exchanger in condenser construction as well as for seawater pipelines. It is due to its favorable corrosion and erosion behaviour a reliable material in cooling water with salinities of more than 0,2%, e.g. in brack and seawater at water speed up to 2,5 m/s. In the case of a natural protective oxide film damage occurs a self-healing process.

Chemical Composition

Al [%] As [%] Cu [%] Fe [%] Mg [%] Mn [%] Ni [%] P [%] Pb [%] Remainder
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Material Compliance

REACh RoHS
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Mechanical Properties

Semi-finished Product Condition Strength Abbrevation Nominal Size [mm] Temperature [°C] Specimen Direction Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Yield Strength (1.0% offset) [MPa] Elongation A [%] Reduction of Area [%] Hardness HV
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Physical Properties

Temperature [°C] Melting Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Shear Modulus [GPa] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)] Electric Conductivity [MS/m]
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Creep Rupture Behaviour

Condition Strength Abbrevation Temperature [°C] Creep Tensile Strength at 10² h [MPa] Creep Tensile Strength at 10³ h [MPa] Creep Tensile Strength at 10^4 h [MPa] 0.1% Creep Limit at 10² h [MPa] 0.1% Creep Limit at 10³ h [MPa] 0.2% Creep Limit at 10² h [MPa] 0.2% Creep Limit at 10³ h [MPa] 0.2% Creep Limit at 10^4 h [MPa] 1% Creep Limit at 10² h [MPa] 1% Creep Limit at 10³ h [MPa] 1% Creep Limit at 10^4 h [MPa] 1% Creep Limit at 3*10^4 h [MPa] 1% Creep Limit at 5*10^4 h [MPa] 1% Creep Limit at 10^5 h [MPa]
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Heat Treatment

Heat Treatment Temperature [°C]
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Cross Reference

Material Name Country Standard
CuZn20Al2 Bulgaria BDS 13710-76
CuZn20Al2As Europe EN 1652
CuZn22Al2 France NF A51-102
CZ 110 Great Britain BS 2870
CZ 110 Great Britain BS 2871
CZ 110 Great Britain BS 2872
CZ 110 Great Britain BS 2873
CZ 110 Great Britain BS 2874
CZ 110 Great Britain BS 2875
LA77-2 Russia GOST 15527
ЛA77-2 Russia ГОСТ 15527
CuZn20Al2 International ISO 426-1
MA77 Poland PN-77/H-87025
CuZn20Al2 Hungary MSZ 770/1-77
C68700 USA UNS
SB-111 UNS C68700 USA ASME SB-111
SB-359 UNS C68700 USA ASME SB-359
SB-395 UNS C68700 USA ASME SB-395
SB-543 UNS C68700 USA ASME SB-543
B111 UNS C68700 USA ASTM B111
B359 UNS C68700 USA ASTM B359
B395 UNS C68700 USA ASTM B395
B543 UNS C68700 USA ASTM B543
CuZn20Al2 Germany DIN 17660 1)
2.0460 Germany DIN 17660 1)
CuZn20Al2As Germany AD 2000 W6/2
1) Source: DIN CEN/TS 13388 (DIN SPEC 9700)

Producer/Supplier/Trade names

Tradename Supplier
2276 OTTO FUCHS KG, Meinerzhagen
CuZn20Al Manfred J.C. Niemann, Bremen
CuZn20Al2 HME Copper Germany GmbH, Menden
CuZn20Al2 CSN Carl Schreiber GmbH, Neunkirchen
CuZn20Al2 MPG Mendener Präzisionsrohr GmbH, Menden
CuZn20Al2 Schreier Metall GmbH, Erkrath
CuZn20Al2 Messingwerk Plettenberg Herfeld & Co. KG, Plettenberg
CuZn20Al2 Wieland Metal Services Germany GmbH, Düsseldorf
CuZn20Al2 Eugen Geyer GmbH, Königsbach-Stein
CuZn20Al2 Wieland Metal Services Germany GmbH, Düsseldorf
CuZn20Al2 Manfred J.C. Niemann, Bremen
S76 Wieland-Werke AG, Ulm
SoMsF6 BUTTING Group, Knesebeck

Linear-elastic

Temperature [°C] Young's modulus [GPa] Bulk modulus [GPa] Shear modulus [GPa] Poisson's ratio
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Electrical resistivity

Temperature [°C] Specific electrical resistance [µΩm]
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Coefficient thermal expansion

Related Temperature [°C] Temperature [°C] Coefficient thermal expansion [10^-6*K^-1]
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Specific heat

Temperature [°C] Specific heat [kJ/(kg*K)]
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Density

Temperature [°C] Density [g/cm³]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Thermal conductivity

Temperature [°C] Thermal conductivity [W/(m*K)]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Designation

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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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Yield strength

Temperature [°C] 0.1% Proof strength [MPa] 0.2% Proof strength [MPa] Yield strength [MPa]
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Tensile strength

Temperature [°C] Tensile strength [MPa]
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Classification

WIAM Material Treatment Semi-finished product Dimension [mm] Load type Failure criteria Rolling direction Maximum stress [MPa] Strain at maximum stress [%] Source description
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