The Labor-Paltina Kft. has TÜV ISO 9001 certification
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the material

information about platinum
and other precious metals

Fluid platinum Solidified platinum

The Labor-Platina Kft. uses pure platinum (Pt99.95), pure gold, pure silver, alloys pure platinum with iridium to get PtIr5 and pure platinum with rhodium to get PtRh10.

The purity of platinum and its possible uses

The international standards define 5 qualities of Platinum.

Fineness
950/1000 Jewel Platinum Containing 5% palladium or copper. For technical aims e.g. Labware unusable
995/1000
2N fineness
technically pure platinum Used for technical aims e.g. Labware
999/1000
3N fineness
chemically pure platinum The impurity is less then 1‰, its verification requires minimum chemistry methods
999.9/1000
4N fineness
physically pure platinum The verification of impurity requires minimum physical methods
999.99/1000
5N fineness
spectroscopewise pure platinum The impurity can be verified with a spectroscope only

Platinum is a easy deformable, weak metal, so for the production of Labware we alloy platinum with iridium or rhodium, to rise its solidity, heat resistance and its resistance to chemical influences.

Precious metals

Six of the Platinum Group Metals (PGMs), just as their often together occuring ores, have a high melting point and a great resistance to chemical influences.

Similar to how these metals take place in the periodic table we can make a difference between two subgroups. The upper row in the table is the lighter, the under row in the table represent the heavier group, which have approximately a two times higher specific weight.

Each precious metal has its couple with similar characteristics in the other group. Ruthenium is similar to osmium. Unalloyed are both not machinable. Rhodium is similar to iridium. Both are quite hard precious metals and not easily to machine. Palladium is similar to platinum. Both are softer metals and easily to machine. Because of that they are the most popular precious metals in the industry. Like gold to silver is platinum the more expensive couple of palladium.

The electric conductivity of each pair is similar, too.

Physical data of precious metals

Metal Ruthenium Rhodium Palladium Silver
Atomic weight 101.07 102.91 106.42 107.87
Density
g/cm³
12.45 12.41 12.02 10.49
Melting point
°C
2334 1964 1555 961.8
Boiling point
°C
4150 3695 2963 2162
Specific heat
cal/(gr * °C)
  0.058 0.059 0.057
Heat of fusion
cal/(gr * °C)
46 52 34.2 25.9
Heat conductivity
cal/(cm * °C * sec)
  0.210 0.168 0.096
Expansion coefficient
α in 10-4 K-1
0.096
(at 40°C)
0.085
(at 40°C)
0.117
(at 20°C)
0.195
(at 20°C)
Electric conductivity
m/(Ω * mm²)
9.6 19.6 9.3 62.5
Temperature coefficient of electrical resistance
α in K-1
  4.43 • 10-3 3.77 • 10-3 4.10 • 10-3

Metal Osmium Iridium Platinum Gold
Atomic weight 190.23 192.23 195.08 197.00
Density
g/cm³
22.61 22.65 21.45 19.32
Melting point
°C
3033 2446 1768 1064
Boiling point
°C
5012 4424 3825 2856
Specific heat
cal/(gr * °C)
0.031 0.032 0.038 0.031
Heat of fusion
cal/(gr * °C)
35 28 23.7 15.9
Heat conductivity
cal/(cm * °C * sec)
  0.111 0.1664 0.7461
Expansion coefficient
α in 10-4 K-1
0.066
(at 40°C)
0.056
(at 20°C)
0.089
(at 20°C)
0.140
(at 20°C)
Electric conductivity
m/(Ω * mm²)
9.7 18.2 9 45
Temperature coefficient of electrical resistance
α in K-1
4.2 • 10-3 3.93 • 10-3 3.92 • 10-3 3.98 • 10-3

Application of platinum alloys

Platinum Alloy Use
PtIr5 Labware platinum,
raw material for Labware
and industrial uses
PtRh5
PtRh10
PtAu5
PtIr10 raw material for special uses
PtIr15
PtIr20
PtIr35
PtRh20
PtCu4 raw material for jewels
PtCu5

Properties of platinum and platinum alloys

These are only the most common alloys. Apart from these also other alloys can be ordered from us.

Material Tensile strength [kg/mm²] Elasticity
[%]
Brinell hardness [kg/mm²] Solution in hot aqua reqia, proportion
emollited on 1000°C
Pt99.9
(chemical pure Pt)
24 35 55 1.0
PtIr5 30 15 100 0.5
PtIr10 48 13 140 0.25
PtIr15 64 12 185 0.17
PtIr20 80 11 230 0.0

Multipliers for Weight Calculation (Pt = 1)

With these multipliers you can calculate the weight of devices that should not be made of pure platinum but of other materials

Material Multiplier
Ir 1.0559440559
PtIr30 1.0167832168
PtIr20 1.0111888112
PtIr10 1.0055944056
PtIr5 1.0027972028
Pt 1
PtAu5 0.995034965
PtRh10 0.9578554779
PtRh20 0.9157109557
PtRh30 0.8735664336
AuPt20 0.92
AuPt10 0.91
Au 0.9006993007
AuPd10 0.87
AuPd20 0.83
AuPd30 0.80
AgPt30 0.64
AgPt20 0.59
AgPt10 0.54
Rh 0.5785547786
Pd 0.56
PdAg50 0.50
Ag 0.489044289
PtCu 995 0.9970792541
AuCu 585 0.7575780886


Keywords: fineness, Pt95%-Ir5%, Pt90%-Ir10%, Pt85%-Ir15%, Pt80%-Ir20%, Au80%-Pt20%, Au90%-Pt10%, Au90%-Pd10%, Au80%-Pd20%, Au70%-Pd30%, Ag70%-Pt30%, Ag80%-Pt20%, Ag90%-Pt10%, Pd50%-Ag50%

Labor-Platina Kft., 1245 Hrsz., 3153 Dorogháza, Hungary
Mail address, office and production:
Labor-Platina Kft., Kisvasút utca 9., 2085 Pilisvörösvár, Hungary
Tax no.: 11750682-2-12, VAT-id: HU11750682
Phone no.: +36 (26) 530 073, Fax: +36 (26) 530 074
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Our Euro (EUR) bank account: IBAN HU36-12010350-01668667-00200004, SWIFT UBRTHUHB
Our Forint (HUF) bank account: IBAN HU57-12010350-01668667-00100007, SWIFT UBRTHUHB
The address of our bank: Raiffeisen Bank Zrt., Akadémia út 6., 1054 Budapest, Hungary