CW112C / CuNi3Si

Age-hardening copper alloy, with good mechanical properties, good corrosion resistance against atmospheric and stress crack attacks, good fatigue strength and thermal resistance.

CW112C is also be known by its copper numbers C70250 and C70320 and chemical reference CuNi3Si.

We stock material as 2” bar, but other sizes can be offered on short lead times.

Material of UK, US and European origin.

Fully certified material, additional testing available.

Same day quote, next day dispatch

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Material is tested at room temperature in longitudinal direction. There is no reduction of area requirement. Material is supplied with a homogeneous microstructure and free from inclusions, porosity & other defects and an ASTM grain size between 5 and 9. We can carry out other tests to meet customer requirements.

Density is 8.8 g/cm3 Electrical Conductivity is a minimum of 18 MS/m.

CW112C Chemical Composition

Min 2.80.8----Bal

CW112C Mechanical Properties

Tensile Strength Yield Strength (0.2% Offset) Elongation in 2" or 4D Hardness (min)
Ksi min MPa min Ksi min MPa min % min HRc HB
100 690 82570 10 13 200

For more technical information download our CW112C information sheet here


CW112C is used primarily within the oil and gas industry for its ductility.

End uses:

  • valve guides
  • bushes and valve seats
  • current-carrying formed parts
  • contact springs / blades, switchgear
  • down-hole tools
  • shear pins
  • hydraulic valve bodies
  • pump components
  • ball valves and mechanical seals

“Every player in the industry needs to offer something different, something new. For Broder Metals Group it’s simple… it’s four specialist divisions each with a compelling offer in terms of product, price and delivery. But most of all, it’s our people. They’re extraordinary.”

Mark Burton


Proud Associates

Broder Metals Group Certified To AS9120
Broder Metals Group Certified To AS9120