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Chromium

Description

General

Chromium (VI) is extremely hazardous and human intake should be prevented.

Properties

Chemical properties

Minimum value Maximum value Unit Sources
%
%

Electrical properties

Minimum value Maximum value Unit Sources
kV/mm
%
-0.91 -0.91 V Idemat 2003
0.13 0.13 Ohm.mm²/m Idemat 2003

Manufacturing Properties

Minimum value Maximum value Unit Sources

Mechanical properties

Minimum value Maximum value Unit Sources
MPa
MPa
MPa
7140 7140 kg/m³ Idemat 2003
%
MPa
J/cm
MPa
MPa
MPa
MPa
25000 25000 MPa Idemat 2003

Optical properties

Minimum value Maximum value Unit Sources

Thermal properties

Minimum value Maximum value Unit Sources
°C
1800 1800 °C Idemat 2003
°C
448 502 J/kg.K Idemat 2003
69 94 W/m.K Idemat 2003
7 8.1 e-6/K Idemat 2003

Environment

9.16 mPt
0.57 Pt
38200 mELU
20.25 MJ/MJ
191 MJ
9.68 kg
0.02 kg
Regards the situation in 1991. 34% Of the world production is underground winning in South-Africa. The GOS produces 29% and Albania 8%. The remaining production is distributed over many small contributors. For this analysis we assumed therefore the production equal to Africa 40%, GOS 40%, Albania 8% and India 12%. For stainless steel Chromium is used in the form of ferrochromium. There exists highcarbon FeCr (GER 73, 5MJ/kg) and lowcarbon (GER 163MJ/kg). They are used in variable ratios. In this analysis we assumed, according to Chapman 83, the average ratio 3, 97% highcarbon en 3% lowC.

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