TM01 Mill Hardened EN CuBe1.7 Copper Rods With High Strength And Good Conductivity

Product Name: TM01 Mill Hardened Copper Rods

Grade: EN CuBe1.7

Outer Diameter: 15mm

Length: 2m, 3m, 5m, 6m or as required

State: TM01 Mill Hardened

Typical Applications And Characteristics of EN CuBe1.7 Copper Alloys:

Typical uses: bellows, bourdon tubing, diaphragms, fuse clips, fasteners, lock washers, springs, switch parts, roll pins, valves, welding equipment.

Characteristics: Excellet cold working and hot working performance, high strength and high elasticity, excellent electroplating, hot dip and welding performance, seawater and industrial atmosphere corrosion.

CUBERYLLIUM ®-170 also named Cube1.7-C17000 (CDA 170) Beryllium Copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. CW100C is the EN numeric designation for this material. Alloy170 is the UNS number. Additionally, the EN chemical designation is CuBe1,7. And the British Standard (BS) designation is CB101. Older literature may refer to this material as ASTM Alloy 165, but this is now discouraged.

Chemical Composition of EN CuBe1.7 Copper Alloys:

Common Standard Specification of EN CuBe1.7 Copper Alloys:

Rod: ASTM B 196, SAE J 461, 463

Forgings and Extrusions : ASTM B570

Sheet: ASTM B 194

Typical Physical Properties of EN CuBe1.7 Copper Alloys:

Mechanical Properties of EN CuBe1.7 Copper Rods:

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Key Technology of Beryllium Copper(Heat treatment)

Heat treatment is the most important process for this alloy system. While all copper alloys are hardenable by cold working, beryllium copper is unique in being hardenable by a simple low temperature thermal treatment. It involves two basic steps. The first is called solution annealing and the second, precipitation or age hardening.

Solution Annealing

For the typical alloy CuBe1.7 the alloy is heated between 720°C and 860°C. At this point the contained beryllium is essentially “dissolved” in the copper matrix (alpha phase). By rapidly quenching to room temperature this solid solution structure is retained. The material at this stage is very soft and ductile and can be readily cold worked by drawing, forming rolling, or cold heading. The solution annealing operation is part of the process at the mill and is not typically used by the customer. Temperature, time at temperature, quench rate, grain size, and hardness are all very critical parameters and are tightly controlled by Cuberyllium.

Age Hardening

Age hardening significantly enhances the material’s strength. This reaction is generally carried out at temperatures between 260°C and 540°C depending on alloy and desired characteristics. This cycle causes the dissolved beryllium to precipitate as a beryllium rich (gamma) phase in the matrix and at the grain boundaries. It is the formation of this precipitate which causes the large increase in material strength. The level of mechanical properties attained is determined by the temperature and time at temperature. It should be recognized that beryllium copper has no room temperature aging characteristics.