Dia 6mm-200mm Pure Perfect Polished Hollow Copper Ball
SPECIFICATION |
ITEM NAME: Dia 6mm-200mm Pure Perfect Polished Hollow Copper Ball |
SIZE: 20CM Copper Sphere |
|
Thickness: 2.0mm |
|
FINISH: Mirror Polished |
|
MATERIAL: Heavy Duty Type AISI304 |
|
Applied Technology: Cutting, Stamping, Polishing & Brushing |
|
Tools: welding guns and polishing machines |
|
Package: Customized wooden case, EPE and cushion on the bottom (depending on means of transport). |
|
Use:
Feature:
|
What is your lead time?
-- Our general lead time is 10-15 days but may extend during peak periods.
Is a deposit required?
--It depends on the price of the purchase. If it is over 10,000 o, then a deposit of 50% of the total sum is required in advance, and the rest could be paid before the products are finished.
If I re-size your designs, is there a price change?
--In most cases, varying the design will result in minimal variations in price. Customising would mean the cost of creating a new template, changes in laser cutting time, and re-formatting our machines usually contributes to a re-size fee.
Physical properties
Density of the chemical elements on a miniature periodic table spark table Density of solid: 8920 kg m-3
Molar volume of the chemical elements on a miniature periodic table spark table Molar volume: |196| cm3
Thermal conductivity of the chemical elements on a miniature periodic table spark table Thermal conductivity: |206| W m1 K1
Heat properties
Melting point on a miniature periodic table spark table Melting point: 1357.77 [1084.62 °C (1984.32 °F)] K
Boiling point on a miniature periodic table spark table Boiling point: 3200 [2927 °C (5301 °F)] K
Enthalpy of fusion on a miniature periodic table spark table Enthalpy of fusion: |203| kJ mol1
Crystal structure
The solid state structure of copper is: ccp (cubic close-packed).
Copper: orbital properties
Copper atoms have 29 electrons and the shell structure is 2.8.18.1. The ground state electronic configuration of neutral Copper is [Ar].3d10.4s1 and the term symbol of Copper is 2S1/2.
Pauling electronegativity of the chemical elements on a miniature periodic table spark table Pauling electronegativity: 1.90 (Pauling units)
First ionization energy the chemical elements on a miniature periodic table spark table First ionisation energy: 745.5 kJ mol1
Second ionization energy the chemical elements on a miniature periodic table spark table Second ionisation energy: 1957.9 kJ mol
Isolation
Isolation: copper metal is readily available commercially so it is not normally necesary to make it in the laboratory. Most copper production is based upon sulphide ores containing little copper but quite a lot of iron. New cleaner technologies are now important but older processes present major environmental problems. Complex procedures are used initially to form a form of copper sulphide appropriate for final reduction via a copper(I) oxide. The resulting crude copper is purified using an electrolytic procedure involving plating onto pure copper cathodes.
Class |
Copper (%) |
Zinc (%) |
Notes |
Alpha brasses |
>65 |
<35 |
Alpha brasses are malleable, can be worked cold, and are used in pressing, forging, or similar applications. They contain only one phase, with face-centered cubic crystal structure. |
Alpha-beta brasses |
55–65 |
35–45 |
Also called duplex brasses. Suited for hot working. It contains both α and β' phase; the β'-phase is body-centered cubic and is harder and stronger than α. Alpha-beta brasses are usually worked hot. |
Beta brasses |
50–55 |
45–50 |
Can only be worked hot, and are harder, stronger, and suitable for casting. |
White brass |
<50 |
>50 |
Too brittle for general use. The term may also refer to certain types of nickel silver alloys as well as Cu-Zn-Sn alloys with high proportions (typically 40%+) of tin and/or zinc, as well as predominantly zinc casting alloys with copper additive. |
<
Fabrication Properties | |
Joining Technique | Suitability |
Soldering | Excellent |
Brazing | Excellent |
Oxyacetylene Welding | Good |
Gas Shielded Arc Welding | Good |
Coated Metal Arc Welding | Not Recommended |
Spot Weld | Fair |
Seam Weld | Not Recommended |
Butt Weld | Good |
Capacity for Being Cold Worked | Excellent |
Capacity for Being Hot Formed | Fair |
Machinability Rating | 30 |
ASTM B134-52 Alloy 7 brass
hemical Analysis:
Copper............................................68.5% to 78.5%
Lead.................................................0.07% maximum
Iron...................................................0.05% maximum
Zinc..................................................Balance
Mechanical Properties
Hardness as measured on parallel flat surfaces is Rockwell “B” 75 to 85.
Tensile Strength............................80,000 psi
Yield Strength................................57,000 psi
Elongation in two inches.............20%
Reduction in area.........................85%
Modulus of elasticity....................15,000,000 psi
Density...........................................0.306 lbs./cu. in.
Brass balls provide excellent resistance to corrosion by water. Brass has the ability to resist the corrosive effects of fuel oil, gasoline, butane, dry carbon dioxide, benzene, lime-sulphur mixture and similar chemical agents.
Corrugated carton, opp bag and foam
Certificate
Wild range of selection of various sizes and materials