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CuSn4 | CW450K Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Predecessor Successor VDA 231-106 classification
CW450K (DIN EN 12166 : 2011-08) CuSn4 CW450K DIN EN 12166 : 2011-08 DIN EN 12166 : 2011-08 replaced by DIN EN 12166 : 2016-11 Replaced Germany CuSn4 CuSn4 3.2 1)
1) Remark: CuSn4, mat. No. CW450K, is comparable to the DIN-make CuSn4, mat. No. 2.1016, acc. to DIN 17662 : 1983-12. The material is specified by a favorable combination of very good cold formability with strength and hardness. It is corrosion resistant, good soft and hard solderable and shows still good electrical conductivity. Properties of the CuSn-alloy are predominantly determined by the tin-content. The alloy is unhardenable, only work hardening is feasible. Tensile strength, yield point and hardness increase according to the rising cold forming grade, elongation after fracture decreases. Electrical and thermal conductivity are lower than for pure copper. Very high resistance to corrosion, particularly to atmospheric influences, seawater, sulfite liquor, carbonated and salted mine water. The alloys are stress corrosion-proof. Processing properties: warm forming: limited cold forming: very good machinability: moderately to hardly hard soldering: very good soft soldering: very good gas welding: medium arc welding: medium TIG-welding: good MIG_welding: good resistance welding: good electron beam welding: good sticking: suitable burnishing: good mechanical burnishing: good electrolytical/chemical burnishing: good galvanizing: very good suitability for dip tinning: very good Appliction: CuSn4 is predominantly used in the form of strips for all types of springs with mean requirements, such as connectors, electrographic springs for contacts and earthing contacts, clamp-connenctions for radio, TV and video, receptacles for electronical assemblies, for pushbutton shifting springs and locking clamps, spring rings as well as for textile machine components. For the electrolytically tinned strip the coatings (Sn bright, Sn matt, Sn fuzed, SnPb) are listed by the application (better solderability, better corrosion resistance, reduction of the electrical contact resistance, better appearance) in the DIN EN 14436 : 2004-11 (Table 5)

Chemical Composition

Fe [%] Ni [%] P [%] Pb [%] Sn [%] Zn [%] 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] Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Yield Strength (1.0% offset) [MPa] Elongation A100 [%] Elongation A11,3 [%] Elongation A [%] Reduction of Area [%] Hardness HV
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Physical Properties

Condition Temperature [°C] Melting Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Poisson's Ratio Mean Coefficient of Thermal Expansion [10^-6*K^-1] 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] Specific Electric Conductivity [% IACS]
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Heat Treatment

Heat Treatment Temperature [°C]
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Cross Reference

Material Name Country Standard
CuSn4 Bulgaria BDS 14010-77
423013 Czech Republik/Slovakia CSN 423013
CuSn4 Czech Republik/Slovakia CSN 423013
CuSn4 Europe EN 12166
BrOF4-0,26 Russia GOST 5017-74
CuSn4 International ISO 427-83
B4 Poland PN-77/H-87050
CuSn4 Hungary MSZ 710/1-79
C51100 USA UNS
B100 UNS C51100 USA ASTM B100
B103 UNS C51100 USA ASTM B103
B888 UNS C51100 USA ASTM B888
C51100 USA SAE J461
CuSn4 Germany DIN 17662 1)
2.1016 Germany DIN 17662 1)
1) Source: DIN CEN/TS 13388 (DIN SPEC 9700)

Producer/Supplier/Trade names

Tradename Supplier
284 William Prym Holding GmbH, Stolberg
B14 Wieland-Werke AG, Ulm
BB40 Sundwiger Messingwerk GmbH & Co.KG, Hemer
BD40 Sundwiger Messingwerk GmbH & Co.KG, Hemer
CuSn4 CSN Carl Schreiber GmbH, Neunkirchen
CuSn4 Wieland-Werke AG, Velbert
CuSn4 KME Germany GmbH, Osnabrück
CuSn4 Schreier Metall GmbH, Erkrath
CuSn4 Gebr. Kemper GmbH + Co, Olpe/Biggesee
CuSn4 Wieland Metal Services Germany GmbH, Düsseldorf
Pro-4 Wieland Metal Services Germany GmbH, Düsseldorf
SnBz4 Le Bronze alloys Germany GmbH, Lüdenscheid