C26800 CuZn33 Industrial Rolled

Transcription

1 Alloy Designation EN DIN CEN/TS CW56L JIS C 268 BS CZ 13 UNS Chemical Composition percentage C268 Cu 67 % Zn Rest % This alloy is in accordance with RoHS 22/96/CE for electric & electronic equipments and 22/53/CE for automotive industry Brass Rolled Products KME offers a wide range of brass rolled products in the form of strips, sheets and discs in order to meet our customer s needs for industrial manufacturing or for the production of gift articles and decorative objects. Characteristics, as well as CuZn28 and CuZn3 is combining excellent cold forming properties with good mechanical strength. CuZn3 has good hot forming properties and excellent soldering and brazing properties. Due to the outstanding deep drawing properties and the other two mentioned alloys are called deep-draw or cartridge brass. We produce qualities with grain sizes below 5 µm if needed. Main Applications Architecture: Handrails, Grillwork Automotive: Tanks, Radiator Cores Builders Hardware: Locks, Push Plates, Finish Hardware, Kick Plates, Stencils. Electrical: Socket Shells, Wire Flashlight Shells, Clips, Lamp Sockets, Lamp Fixtures, Screw Shells, Reflectors. Fasteners Groets, Eyelets, Screws, Rivets, Pins, Fasteners. Industrial Air Pressure Conveyer Systems, Bead Chain, Springs. Marine: Fasteners. Plumbing: Plumbing Accessories, Sanitary Traps, Sink Strainers, Bathroom Fixtures. Typical Application: Metal goods, Deep drawn parts, Components for the electrical industry, stamped parts, Connectors. Preferred Applications Jewellery and Metall Goods Deep Drawn Parts Physical Properties Typical values in annealed temper at 2 C Density 8.5 g/cm³ Thermal expansion coefficient C C Components for the Electrical Industry Stamped Parts xx xx xx xx x x = well suited xx = particularly well suited Connectors /K 1-6 /K Specific heat capacity.377 J/(g K) Thermal conductivity 121 W/(m K) Electrical conductivity (1 MS/m = 1 m/(ω ²) 15 MS/m Electrical conductivity (IACS) 26 % Thermal coefficient of electrical resistance (.. 1 C) /K Modulus of elasticity ( 1 GPa = 1 kn/²) cold formed annealed GPa GPa Page 1

2 Mechanical Properties (EN 1652) R28 G1 Annealed G2 Annealed G3 Annealed G5 Annealed Electrical Conductivity Tensile Strength Rm Yield Strength Rp.2 * Elongation Minimum A 5 Grain Size Hardness MPa MPa % µm HV < R R R5 > > 155 * only for information HV * E. Conductivity [MS/m] Electrical conductivity is strongly influenced by chemical composition. A high level of cold deformation and small grain size decrease the electrical conductivity moderately. Minimum conductivity level can be specified. 12 R28 R35 R42 R5 Fabrication Properties* Cold Forming Properties Max. 9% between annealings Hot Forming Properties at C Machinability (Rating 3) Electroplating Properties Hot Tinning Properties Soft Soldering, Brazing Resistance Welding Gas Shielded Arc Welding Laser Welding Excellent Good Fair Excellent Excellent Excellent Good Fair Less Suitable Soft Annealing C Corrosion Resistance* Resistant to: has a good resistance to water, water vapour, different saline solutions, many organic liquids. Industrial-, maritime- and country air. in cold formed temper, as well as under internal and external tension, tends to stress corrosion cracking, when in contact with e.g. hydrous aonia, aoniac salt or amine and others. Trough a heat-treatment of semi-finished or finished products the risk of stress corrosion can be reduced. Not resistant to: Acids, hydrous sulphur components, hydrous aonia (stress corrosion cracking) in non-stress-relieved condition. * For more details call our technical service Stress Relieving Annealing C * For more details call our technical service Page 2

3 Bending Properties :.5 relative Bending Radius R/T Bending bending edge transvers to rolling direction bending edge in rolling direction Bending test according to EN ISO 7438 is done with 1 wide samples. Smaller samples in general as well as lower thickness allow a lower bending radius without cracks. If needed we supply bending optimized temper classes that far exceed standard quality. Please take care when comparing with ASTM E 29 results, there the bend definition direction is contradictory. Bending Definition relative Bending Radius R/T R28 R35 R42 R5 bending edge transvers to rolling direction bending edge in rolling direction 18 Bending Bending Properties* R28 R35 R42 R5 Transvers Bending 9 Bending 18 Parallel Transvers Parallel R/T R/T R/T R/T R28.5 R35.5 R R5.5.5,5 - - * Measured at sample width 1 according to EN 1654 Possible bending radius = (R/T) x thickness Transverse = good way Parallel = bad way 18 Parallel 9 Parallel 9 Transverse 18 Transverse Minimum Bending Radius Calculation To find out the minimum possible bending radius take the R/T value from the list. Example: R/T =.5 and thickness.3 Minimum radius = (R/T) x thickness =.5 x.3 =.15 Page 3

4 Softening Resistance Vickers Hardness HV Vickers Hardness HV Time [s] Time [s] R42 at 4 C R42 at 5 C R42 at 6 C R5 at 4 C R5 at 5 C R5 at 6 C After short time heat treatment Vickers Hardness is measured. The diagram shows typical values. Bend Fatigue (at room temperature) The fatigue strength gives an indication about the resistance to variations in applied tension. It is measured under syetrical alternating load. The maximum bending load for 1 7 load cycles without crack is measured. Dependent on the temper class it is approximately 1/3 of the tensile strength R m. Page 4

5 Relaxation Properties Values from CuZn3 Thermal stress relieved, will have lower values Remaining Stress [%] Remaining Stress [%] Remaining Stress [%] Remaining Stress [%] R65 1 C R65 15 C R65 2 C Time [h] R65 1 C R65 15 C R65 2 C Time [h] R65 1 C R65 15 C R65 2 C Time [h] R65 1 C R65 15 C R65 2 C Time [h] Initial Stress: 5% of Rp.2 Parallel Rolling Direction Initial Stress: 5% of Rp.2 Transverse Rolling Direction Initial Stress: 8% of Rp.2 Parallel Rolling Direction Initial Stress: 8% of Rp.2 Transverse Rolling Direction Stress relaxation is tested with cantilever bending test equipment. This method is taking short time relaxation into account. so that the values achieved are very realistic, while other test methods like tube test pretend better properties from the achieved values. Relaxation values give an indication about stress relieve of strip under tension for a certain time and temperature. As it is measured on plain strip. the behaviour of deformed parts may differ. nevertheless the ratio between the different tempers remains the same. Typical test sample thickness is.3.6. Page 5

6 Brass Processing Alloy Machining Mechanical Polishing Electro Polishing CuZn CuZn CuZn CuZn CuZn CuZn CuZn CuZn CuZn39Pb CuZn CuSn3Zn9 CuSn2Zn1 Brazing Gas Welding Gas Shielded Arc Welding = excellent 2 = good 3 = fair 4 = less suitable Resistance Welding Laser Welding Phase Diagram Copper Zink (after Struers Scientific Instruments) Page 6

7 Camber Customized Tolerances Evenness L Rolling direction Our products are produced in accordance with relevant norms EN 1652 / EN Customer specific tolerances for,, Camber, Transverse Flatness, Evenness, Twist and Coil set can be defined. We will be happy to meet your demands. EN 1652 defines only camber. Tolerance L [] EN [] KME Standard [] KME Precision [] Coil set Twist ±.18 ±.5 ± ±.22 ±.7 ±.5 L Rolling direction angle ±.25 ±.15 ± ±.3 ±.15 ± ±.4 ±.17 ± ±.4 ±.2 ± ±.4 ±.22 ±.12 h h Transverse Flatness ±.5 ±.25 ± ±.6 ±.3 ± ±.7 ±.45 ± ±.1 ±.5 ± ±.12 ±.6 ±.3 h L Evenness Tolerance [] [] Roughness Ra [µm] [] On request > 2. Tolerance Standard / Precision [] [] , / / / / / / / / / / / / / / / / / / / / / / / / / Page 7

8 Formats Dimension* Coil Strip thickness (other thicknesses on request) Strip width Outside diameter (Standard) (Deep-Drawing Quality) per , 1,4 8,4 8, 12. Traverse wound strip Drums: wood, plastic, metal, flangeless ,5 TECSTRIP _multicoil Inner diameter 3 for thickness Inner diameter 4 for thickness Maximum weight Outer diameter maximum , 1,6 Sheet 6.35 Length Sheets in standard dimensions e.g. 1, x 2, on stock , 2.. 6,5 2,8.. 8, Sheet > 6.35 Length Sheets in standard dimensions e.g. 1, x 2, , 2.. 7,5 1, Plate Length , 15, 8, Disc Diameter , 1, * Some combinations might not be possible Page 8

9 Surface coatings & Special Treatments * Dimension Hot-Dip tinned and STOL 28M Tin-Silver STOL 13 Thermic Sn Tin Layer µm Different thickness per side possible Electroplating Tin, Silver, Gold, Cu-Flash, Ni-Flash, Selective plating Other coatings on request Profiled strips STOL Multigauge Other width on request Bright and polished appearance GS1 Surface Quality Skin passed material, meaning it has been 1, 1.5 Surface with extra low residual carbon content possible. Protection with oil or adhesive foil on request * Further details you find at Standards for copper and copper alloys EN 1652 EN 1654 EN 1758 Plate, sheet, strip and circles for general purposes Strip for springs and connectors Strip for lead frames EN Hot-dip tinned strip EN Copper plate, sheet and strip for electrical purposes EN Electrolytically tinned strip Page 9 _11_218