Gold

We are specialists in semi-finished steel and metal products, as well as standard parts. We have a wide range of products in our large warehouse located in Europe which is constantly growing and is designed according to high quality standards.

We sell all over Europe, gold and other refractory metals. We ship within 24 hours for whole Europe. Fast and uncomplicated deliveries.

We sell countless flat, round and square steels and precision tools with various dimensions and profiles.

 

Purchase refractory metals such as rhenium, molybdenum, copper, brass, bronze, aluminum, osmium, ruthenium, iridium, rhodium, palladium, tantalum, titanium, platinum, nickel alloys, pure tungsten, niobium, silver and composite metals and gold.

We work together with more than 10,000 clients from the mechanical engineering, tool manufacturing, mold manufacturing, cabinet construction, factory building and metal structures industries.

Gold

Pure metallic gold has remarkable properties because it is the most malleable and ductile of the metals and with an unusual color in keeping with the elements of its class. It is mainly non-reactive, conducts good electricity and is extremely dense. The density of gold helped to drive its relative rarity, for when the Earth was formed the gold would have sunk to a large extent in the center of the planet. According to science, virtually all gold discovered by humans was deposited considerably later by meteorites that contained the element.

The rarity of gold is explained by its combination of the ease with which it can be worked, the visual distinction and the resistance to chemical corrosion, which makes it an extremely unusual material and object of much fascination.

Description:

Symbol: Au

Atomic number: 79

Atomic weight: 196.9666

Element Category: transition metal

Group, period, block: 11, 6, d

Color: golden yellow

Other names: Ou, Oro, Ouro, Guld

Physical properties

Melting point: 1064.18, 1947.52, 1337.33 K

Boiling point: 2856, 5173, 3129 K

Density: 19.30 g / cm 3

Liquid Density â € ƒâ € ƒâ € ƒMelting Point: 17.31 g / cm3

Density @ 20øC: 19.32 g / cm 3

Solid density: 19300 kg · m 3

Specific heat: 0.13 (kJ / kg K)

Critical point: 7250 K, 510.0 MPa

Heat of Melting (kJ · mol -1): 12.7

Heat of Vaporization (kJ · mol -1): 343.1

Heat of Atomization (kJ · mol -1): 365.93

Thermal conductivity: 318 W · m -1 · K -1

Thermal expansion: (25 ° C) 14.2 μm · m -1 · K -1

Electrical resistivity: (20 ° C) 22.14 n · m

Tensile strength: 120 MPa

Molar heat capacity: 25.418 J · mol -1 · K -1

Young's modulus: 79 GPa

Shear modulus: 27 GPa

Bulk module: GPa 180

Poisson ratio: 0.44

Hardness of Mohs: 2,5

Vickers hardness: 216 MPa

Brinell hardness: 25 HB

Sound velocity: (rt) 2030 m · s -1

Pauling's electronegativity: 2.54

Allred Rochow Electronegativity: 1,42

Electronegativity of Mulliken-Jaffe: 1.87 (s orbital)

Pauling's Electropositivity: 1.46

Reflectivity (%): 95

Physical properties

Melting point: 1064.18, 1947.52, 1337.33 K

Boiling point: 2856, 5173, 3129 K

Density: 19.30 g / cm 3

Liquid Density @ Melting Point: 17.31 g / cm3

Density @ 20øC: 19.32 g / cm 3

Solid density: 19300 kg · m 3

Specific heat: 0.13 (kJ / kg K)

Critical point: 7250 K, 510.0 MPa

Heat of Melting (kJ · mol -1): 12.7

Heat of Vaporization (kJ · mol -1): 343.1

Heat of Atomization (kJ · mol -1): 365.93

Thermal conductivity: 318 W · m -1 · K -1

Thermal expansion: (25 ° C) 14.2 μm · m -1 · K -1

Electrical resistivity: (20 ° C) 22.14 n · m

Tensile strength: 120 MPa

Molar heat capacity: 25,418 J · mol -1 · K -1

Young's modulus: 79 GPa

Shear modulus: 27 GPa

Bulk module: GPa 180

Poisson ratio: 0.44

Hardness of Mohs: 2,5

Vickers hardness: 216 MPa

Brinell hardness: 25 HB

Sound velocity: (rt) 2030 m · s -1

Pauling's electronegativity: 2.54

Allred Rochow Electronegativity: 1.42

Electronegativity of Mulliken-Jaffe: 1.87 (s orbital)

Pauling's Electropositivity: 1.46

Reflectivity (%): 95

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