C18150/C17200 15X15X200mm Rectangle Bar

• Product Type: Rectangle Bar
• Material: Cu
• Carbon Content: Low Carbon
• Transport Package: Wooden Case
• Specification: 15x15
• Trademark: UALLOY
• Model NO.: C18150
• Origin: Hangzhou, China
• HS Code: 74082900
• Production Capacity: 1000t

Product Description

 

Chemical Composition (Weight Percent) of C17200 Beryllium Copper Alloy:

Delivering Solutions
Alloy	Beryllium	Cobalt	Nickel	Co + Ni	Co+Ni+Fe	Copper
C17200	1.80-2.00	-	0.20 Min	0.20 Min	0.60 Max	Balance

Remark: Copper plus additions equal 99.5% Min.

 

Typical Physical Properties of UALLOY 172:
Density (g/cm3): 8.36
Density before age hardening (g/cm3): 8.25
Elastic Modulus (kg/mm2 (103)): 13.40
Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6
Thermal Conductivity (cal/(cm-s-°C)): 0.25
Melting Range (°C): 870-980

 

 

Common Temper we supply:

CuBeryllium Designation	ASTM	Mechanical and Electrical Properties of Copper Beryllium Strip
	Designation	Description	Tensile Strength (Mpa)	Yield Strength 0.2% offset	Elongation Percent	HARDNESS  (HV)	HARDNESS Rockwell B or C Scale	Electrical Conductivity (% IACS)
A	TB00	Solution Annealed	410~530	190~380	35~60	<130	45~78HRB	15~19
1/2 H	TD02	Half Hard	580~690	510~660	12~30	180~220	88~96HRB	15~19
H	TD04	Hard	680~830	620~800	2~18	220~240	96~102HRB	15~19
HM	TM04	Mill hardened	930~1040	750~940	9~20	270~325	28~35HRC	17~28
SHM	TM05		1030~1110	860~970	9~18	295~350	31~37HRC	17~28
XHM	TM06		1060~1210	930~1180	4~15	300~360	32~38HRC	17~28

 

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 CuBe1.9 (1.8- 2%) 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 UALLOY.

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.

Photos: