Measurement range of the carbon silicon analyzer
The thermal analyzer for cast iron is not a universal tester; using it outside its calibration range will yield incorrect readings without triggering an error message.
A common misconception is that the thermal analyzer measures every element in any molten metal. In reality, the device is calibrated for molten cast iron and specific elements only; using it outside this range yields incorrect data without triggering an error.
This article clarifies the measurement scope for each material type, helping workshops determine when to use thermal analysis equipment and when to switch to alternative methods.
Key Control Points
Measured
C%, Si%, and equivalent carbon in gray and ductile iron in the liquid state prior to pouring.
Sub-index
Depending on the configuration, the device also provides predictions for tensile strength, hardness, and degree of graphitization.
Not suitable
Liquid steel and alloys outside the calibration range should not be used to determine composition with this device.
Other elements
Mn, S, and P require different methods; thermal analyzers do not replace laboratory testing.
Real-world experience
- Specify the iron type on the heat sheet, as the same number can have different meanings between gray iron and ductile iron.
- Perform periodic calibration checks using standard samples to detect calibration drift.
- Do not use thermal analysis results for steel, even if the displayed values appear reasonable.
Compatible device
CYY-LK2 Pre-furnace Rapid Carbon-Silicon Analyzer
Carbon-Silicon Analyzer CYY-LK2 — Analyze C and Si in molten iron before the furnace. CE certified, English interface.
Reference price: 700-800 USD
CYY-LK7 Cast Iron, Gray Iron, and Ductile Iron Analyzer
Gray Cast and Ductile Iron Analyzer CYY-LK7 — Analyzes C, Si, Mn, CEL, spheroidization ratio, tensile strength, and hardness. CE certified with 15-inch-inch TFT display.
Reference price: 1700-1900 USD
CYY-CE Carbon-Silicon Analyzer Sample Cup — CYY-CE1/CE2/CE3 Tellurium Insulated Probe Cup
CYY-CE1/CE2/CE3 Tellurium Sampling Cup for Carbon Silicon Analyzer CYY-LK2/LK7. Essential consumables for iron casting workshops.
Reference price: 0.5-1.5 USD
Frequently Asked Questions
Can carbon be measured in steel?
For steel, use spectroscopic or chemical methods; thermal analyzers calibrated for cast iron are not suitable for molten steel.
Do the results depend on the sampling cup type?
Yes. Cups with different coating compositions will produce different cooling curves, so you must use the cup type recommended.
Related topics
- What is a liquid iron analyzer and what does it measure?
- What is the difference between a C-Si-Mn analyzer and other spectrometers?
Reference content from Changyouyi's technical article: original post on Sohu.
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