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1.U-type rod., 2.W-type rod. - details see: https://www.machineto.com/45-degree-cold-zone-w-type-silicon-molybdenum-rod-10214391

45°Cold Zone W Type Silicon Molybdenum Rod

Volume Density	Anti-fold Intensity	Vickers Hardness	Porosity	Water Absorption	Heat Stretch
5.5g/cm3	15-25kg/cm3	(HV)570kg/cm2	7.4%	1.2%	4%

Chemical Properties

Under the high temperature oxidation atmosphere, the surface of MoSi2 heating rod will generate the quartz protective covering to protect molybdenum rod from continuing to oxidate. When the temperature is more than 1700°C, the quartz protective covering melts and the MoSi2 element continue to use, the quartz protective covering regenerates. MoSi2 heating rod is not suitable to be exerted in the temperature from 400°C to 700°C. Otherwise, the elements will be effloresced astributing to the intense low temperature oxidation.

The Using Temperature Under the Different Atmospheres

Atmosphere	The Maximun Using Temperature of Elements
	1700	1800
No2,Co2,O2,Air	1700°C	1800°C
He ,Ar ,Ne	1650°C	1750°C
So2	1600°C	1700°C
CO ,H2	1500°C	1600°C
Wet H2	1400°C	1500°C
Dry H2	1350°C	1450°C