High Copper Alloys CuNi2Si (CW111C)

CuNi2Si is the beryllium-free answer to CuBe2. The material reaches tensile strengths above 640 N/mm² and thus matches the level of the beryllium-bearing alloys, but without any beryllium, so machining requires no special protective measures. Under EN it is designated CW111C, the material number is 2.0855.

We supply CuNi2Si as round bars, flat bars and hexagonal bars ex stock. Cut to your dimensions, no minimum order.

Properties

Chemical properties

Cu	Rest
Ni	1,6 - 2,5 %
Si	0,4 - 0,8 %
Mn	max. 0,1 %
Fe	max. 0,2 %
Pb	max. 0,02 %
Others	max. 0,3 %

Mechnical properties - bars

Condition	Tensile strength R_m N/mm²	Yield strength R_{p 0,2} N/mm²	Elongation A %	Hardness HB
Round bars
Ø 8 - 30 mm R640 - H180	≥ 640	≥ 590	≥ 10	180 -230
Ø 31 - 50 mm R600 - H165	≥ 600	≥ 520	≥ 10	165 -210
Ø 51 - 122 mm R550 - H150	≥ 550	≥ 430	≥ 15	150 -190
Flat bars
M	*	*	*	*
Thickness 3 - 30 mm R600 - H165	≥ 600	≥ 520	≥ 10	165 -210
Thickness 31-30 mm R550 - H150	≥ 550	≥ 430	≥ 15	150 -190
Hexagon bars
Ø SW 17 - 30 mm R640 - H180	≥ 640	≥ 590	≥ 10	180 -230
Ø SW 32 - 50 mm mm R600 - H165	≥ 600	≥ 520	≥ 10	165 -210
Ø SW 55 mm R550 - H150	≥ 550	≥ 430	≥ 15	150 -190

Product variants

Round bars

Alloy	CuNi2Si, CW111C
Variant	extruded and drawn / extruded
Norm	DIN EN 12163:1998
Tolerance	DIN 1756, h11 Ø 8 - 10 mm + 0 / - 0,09 mm Ø 11 - 18 mm + 0 / - 0,11 mm Ø 19 - 30 mm + 0 / - 0,13 mm Ø 31 - 50 mm + 0 / - 0,16 mm Ø 51 - 71 mm + 0 / - 0,19 mm extruded Ø 81 - 122 mm + 0 / - 1 mm
Datasheet	Datasheet

Flat bars

Alloy	CuNi2Si, CW111C
Variant	extruded and drawn
Norm	DIN EN 12163:1998 / 12167
Tolerance	DIN 12163 / 12167 Class A
Datasheet	Datasheet

Hexagon bars

Alloy	CuNi2Si, CW111C
Variant	extruded and drawn
Norm	DIN EN 12163:1998
Tolerance	DIN 1763, h12 SW 17 mm + 0 / - 0,18 mm SW 19 - 30 mm + 0 / - 0,21 mm SW 32 - 50 mm + 0 / - 0,25 mm SW 55 mm + 0 / - 0,30 mm
Datasheet	Datasheet

Similar materials

CuNi2Si, 2.0855, DIN 17666
C 64700, C18000 UNS
C 102, BS 2872, 2874

Typical applications

Mould inserts and cores in plastics tooling
Guide strips and sliding elements under high load
Components for welding torches and welding technology
Connectors and current-carrying components
Replacement for CuBe2 where beryllium is excluded

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