Copper and copper alloys · Alloy 165 / UNS C17000

Beryllium Bronze Alloy C17000 (Alloy 165): Technical Characteristics and Application

Technical Specification and Engineering Parameters of Alloy C17000 (Alloy 165)

Rolled productsInternational markingClassification groupRegulatory basis (Standards)International analogues
Rolled productsInternational markingClassification groupASTMASMEW.Nr. (Germany)EN (Europe)
Bars, plates, sheetsUNS C17000, Alloy 165, CA170Copper-beryllium alloys with controlled phosphorus contentB194, B196, B570, B888SB194, SB196, SB570, SB8882.1245CW100C, CW101C, CuBe2, CuBe1,7

Beryllium bronze of UNS C17000 grade, also known as Alloy 165, is a precipitation-hardening copper-based alloy. This material is designed to achieve a unique balance between high ductility in the homogenized (annealed) state and excellent strength characteristics after heat treatment (aging). EV Group China technologists use this alloy to manufacture critical components requiring high fatigue strength, wear resistance, and adequate electrical and thermal conductivity. Its excellent formability in the soft state allows for complex cold forming methods, making it indispensable in the production of precision springs, connectors, relays, and components for the aerospace and oil and gas industries.

Normalized Chemical Composition of Alloy C17000 (in % by weight)

Al (Aluminum)<0,2
Be (Beryllium)1,6-1,79
Si (Silicon)<0,2
Cu (Copper)Balance

Note: According to the specification, the minimum total content of Co+Ni is 0.2%. The maximum total content of Co+Fe+Ni impurities is limited to 0.6%.

Mechanical Properties of Alloy C17000 Rolled Products according to ASTM B194

Parameters according to ASTM B194Condition (Temper)CodeTF00TF00TH01TH02TH04
Parameters according to ASTM B194Condition (Temper)FormATAT1/4 HT1/2 HTHT
Parameters according to ASTM B194Section thickness, mm<4,78>4,78---
Parameters according to ASTM B194Tensile Strength, MPa1035-12401140-13451105-13101170-13801240-1450
Parameters according to ASTM B194Yield Strength, MPa, min.89589593010002,5
Parameters according to ASTM B194Elongation A50, %, min (for t >0,102mm)332,511
Parameters according to ASTM B194Hardness (Rockwell)Scale C3336353738
Parameters according to ASTM B194Hardness (Rockwell)Scale 30N5356555758
Parameters according to ASTM B194Hardness (Rockwell)Scale 15N76,5787778,579,5

Physical Constants of Material C17000 (Alloy 165)

Melting Temperature, °FDensity at 68°F, pounds/inch³Specific gravity (density), g/cm³Electrical Conductivity at 68°F, % IACSThermal Conductivity at 68°F, BTU/foot·hr·°FCoefficient of Thermal Expansion (68–572 °F), 10^-6/°FSpecific Heat at 68°F, BTU/pound/°FModulus of Elasticity (Tension), thousand pounds/inch²Shear Modulus (Rigidity), thousand pounds/inch²
18000,3048,4122629,90,1185007300