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Grade CuNi3Si
Germany W-Nr. 2.0857
Corresponding Standard DIN 17672-1-1983
Wrought copper and copper alloys bars；Properties.
Classification Copper and Copper Alloys
Properties Strength
Density 8.8 g/cm3
CuNi3Si Chemical Element Composition Content (%)
Component Si Ni Other Total More
Minimum Value 0.8 2.6 - Cu:余量
Maximum Value 1.3 4.5 0.6
"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.
CuNi3Si Mechanical Properties
diameter/thickness
d
mm		 Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Extruded material (P); Size by agreement 2.0857.08 Extrusion or Hot Forging P (.08) No Specified Mechanical Properties No Specified Mechanical Properties No Specified Mechanical Properties No Specified Mechanical Properties
Round material; d≤90 2.0857.60 Solution + artificial aging F69(.60) ≥690 ≥540 ≥8(A5) ≈200
Square material, hexagonal material; d ≤ 75 2.0857.60 Solution + artificial aging F69(.60) ≥690 ≥540 ≥8(A5) ≈200
Flat material; d ≤ 40 2.0857.60 Solution + artificial aging F69(.60) ≥690 ≥540 ≥8(A5) ≈200
Round bars; d≤20 2.0857.53 Solution heat treatment + cold working hardening F61(.53) ≥610 ≥550 ≥8(A5) ≈180
Square material, Hexagonal material; d≤17 2.0857.53 Solution heat treatment + cold working hardening F61(.53) ≥610 ≥550 ≥8(A5) ≈180
Round bars; d≤20 2.0857.73 Solution heat treatment + cold working hardening + artificial aging F83(.73) ≥830 ≥780 ≥10(A5) ≈220
Square material, Hexagonal material; d≤17 2.0857.73 Solution heat treatment + cold working hardening + artificial aging F83(.73) ≥830 ≥780 ≥10(A5) ≈220
New and Old Grade Replacement List
Corresponding Standard Grade
DIN 17672-1-1983
Grade
Germany W-Nr.
DIN EN 12163-1998
Grade
Germany W-Nr.
Old Grade
Approximate Comparison Table Copper and Copper Alloy
Germany European Standard
DIN EN/DIN W-Nr. EN Numerical Grade
CuNi3Si 2.0857 CuNi3Si1 CW112C
CuNi3Si Corresponding Standards(Same grade name, different standards)
1 DIN 17672-1-1983
CuNi3Si 2.0857
2 DIN 17666-1983
CuNi3Si 2.0857

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