ASTM B197 (C17200) Tempered Round Wires For Springs With High
Strength Conductivity
Product Description:
Name: Tempered Round Wires
Grade: ASTM B197(C17200)
Specification: Diameter 0.1-0.8mm
Surface: Bright
State: A(TB00), 1/4H(TD01), 1/2H(TD02), 3/4H(TD03, H(TD04)
Features: High strength conductivity
Application: For springs
You migth also be interested in:
- CuBe2Pb-UNS.C17300 free cutting beryllium copper
rods/bars/wires/sheet/coil.
- CuCo2Be-UNS.C17500 Cobalt Beryllium Copper
wires/bars/rods/tube/plate/sheet/coil.
- CuCo1Ni1Be Cobalt Nickel Beryllium Copper
wires/rods/bars/pipe/sheet/plate/coil.
Our Advantages:
- We can provide special specification forms according to customers'
requirement.
- We are also a manufacturer of beryllium copper alloy products, so
we could provide the products in conformity with your requests.
- Our factory has rich technical force and advanced production
equipment and coordinated advanced test equipment and method.
Chemical Composition of ASTM B197 (C17200) Copper Alloy:
| CUBERYLLIUM® Brand | UNS-Number | Beryllium | Cobalt
+ Nickel | +Cobalt
+ Nickel
+ Iron | Pb | Copper |
| Cuberyllium-C172 | C17200 | 1.80-2.00 | 0.20 min | 0.6 max | 0.02 Max | Balance |
Copper plus additions equal 99.5% Min.
Typical Physical Properties of ASTM B197 (C17200) Copper Alloy:
| Density (g/cm3): | 8.36 |
| Density before age hardening (g/cm3): | 8.25 |
| Elastic Modulus (kg/mm2 (103)): | 13.4 |
| 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 |
Mechanical and Electrical Properties of ASTM B197 (C17200) Copper Round Wires:
| Alloy | Temper (*) | Heat Treatment | Tensile Strength Mpa | Elongation percent | Electrical Conductivity percent IACS |
CUBERYLLIUM
172 | A | / | 400～580 | 30-60 | 15-19 |
| (TB00) |
| 1/4 H | / | 570～795 | 3~25 | 15-19 |
| (TD01) |
| 1/2 H | / | 710～930 | 2~15 | 15-19 |
| (TD02) |
| 3/4 H | / | 840～1070 | 2~8 | 15-19 |
| (TD03) |
| H | / | 915～1140 | 1~6 | 15-19 |
| (TD04) |
CUBERYLLIUM
172 | AT | 3 hr 315℃ | 1050~1380 | 3 min | 22-28 |
| (TF00) |
| 1/4 HT | 2 hr 315℃ | 1150~1450 | 2 min | 22-28 |
| (TH01) |
| 1/2 HT | 1.5hr 315℃ | 1200~1480 | 2 min | 22-28 |
| (TH02) |
| 3/4 HT | 1.0 hr 315℃ | 1250~1585 | 2 min | 22-28 |
| (TH03) |
| HT | 1.0hr 315℃ | 1300~1585 | 1 min | 22-28 |
| (TH04) |
International Specification of ASTM B197 (C17200) Copper Alloy:
| Product Type | Temper Type |
| Bar | ASTM B196 |
| Military Mil-C-21657 |
| Rod | ASTM B196 |
| Military Mil-C-21657 |
| Wire | ASTM B197, AMS4725, SAE J461,463, RWMA Class 4 |
| European Standards | CuBe2, Alloy 25, BrB2, DIN.2.1247, CW101C to EN |
Note:
ASTM: American Society for Testing and Materials
SAE: Society of Automotive Engineers
AMS: Aerospace Materials Specification(Published by SEA)
RWMA: Resistance Welder Manufacturers' Association
Note: Unless otherwise specified, material will be produced by
ASTM.
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 CuBe2Pb, 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 ohmalloy.
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.
Fabrication
| JOINING TECHNIQUE | SUITABILITY |
| Brazing | Good |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Excellent |
| Capacity for Being Hot Formed | Good |
| Coated Metal Arc Welding | Good |
| Gas Sheilded Arc Welding | Good |
| Machinability rating | 50 |
| Oxyacetylene Welding | Not Recommended |
| Seam Weld | Fair |
| Soldering | Good |
| Spot Weld | Good |
Product Photo:
Application of ASTM B197 (C17200) Copper Alloy:
Our alloys combine a range of properties particularly suited to
meet the exacting requirements of many applications in the
automotive, electronic, aeronautical, Oil&Gas, watch,
electro-chemical industries, etc. Beryllium Copper is widely used
in those fields as contact springs in various applications like
connectors, switches, relays, etc
FAQ:
Q1:Could you produce Beryllium Copper strip by Mill Hardened
process.
A1:Yes, we could produce AM(TM00), 1/2HM(TM01).HM(TM04) XHM(TM06)
XHMS(TM08).,we are the only factory could do harden strip in China.
Q2: What’s the advantages the Beryllium Copper of CUBERYLLIUM®.
A2: 1: The Biggest Coil weight could be reach 1200kg/Coil
2:We are the only one who melting by Vacuum semi-Continuous
Furnace.
3:Surface further polishing for top clients.
Q3: Why you melting by Vacuum semi-Continuous Furnace.
A3:Could be get the Cast ingot without gas,smaller segregation,
Grain Refinement
Q4: What's the payment terms?
A4: We accept T/T, L/C, Paypal etc. It can be negotiated when the
amount is different.
