thermal expansion of carbon steel at temperature
thermal expansion of carbon steel at temperature
(OP)
Hi,
Does anyone know the thermal expansion rate at 1000°C on Carbon steel. A rough figure will do.
Does anyone know the thermal expansion rate at 1000°C on Carbon steel. A rough figure will do.





RE: thermal expansion of carbon steel at temperature
RE: thermal expansion of carbon steel at temperature
Otherwise it would need to be in non-oxidising environment and accept maybe 30% room temperature
strength for rather short periods as it will creep badly.
extrapolate it from this data.
http://www.engineeringtoolbox.com/thermal-expansio...
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RE: thermal expansion of carbon steel at temperature
Temp. (C) Coeff. (x10^-6)
0-100 10.5
100-200 11.5
200-300 13.
300-400 15.
400-500 14.
500-600 16.
600-700 16.
above 900 29.
As TVP noted, and visible in the data, is the phase transition to austenite occurring above 900 C, which tends to honk up the numbers. Note this is also a fairly high carbon steel.
RE: thermal expansion of carbon steel at temperature
The reason I was asking is because it was suggested to use this as a fixture and clamps used in a heat teatment process to remove distortion. It was suggested that this material would be used as a base fixture to locate a nickel alloy ring onto, and also use the steel material as clamps to hold the nickel alloy ring down, and heat treat to 1000°C in order to remove distortion. I was looking at the thermal expansion rates to prove that this wasn't possible. In any case I think the carbon steel would be so soft at that temp that the nickel alloy would be welded into it.
RE: thermal expansion of carbon steel at temperature
It is difficult to find a metal with any usable strength at that temp.
According to ASM, High temperature property data: ferrous alloys
all in 10exp-6/C
0-600C 14.6
0-700C 14.9
0-800C 16.6
0-1000 13.7
These are averages for the entire range.
Yes there is a peak in the curve.
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Plymouth Tube
RE: thermal expansion of carbon steel at temperature
For the thermal expansion coeffient data, what could be the down peak at 0-1000C? somthing to do with the phase trasformation to anstenite? we know austenite is fcc, ferrite is bcc, the former has large lattice parameters. also, austenite has a higher coefficient about 24ppm/C. I expected a larger coefficient at 0-1000C, compared with 0-800C!
Carbon content is another factor to consider: carbon obviously increases lattice parameters, but the coefficient normally decreases with increasing C content, i.e. high carbon steel has a lower thermal expansion coefficient.
RE: thermal expansion of carbon steel at temperature
I am reminded of a gear manufacturing company, several years ago, who had a serious problem . They were facing distortion problem in their machined gears and there was not enough stock to correct them. The problem was they had mild steel fabrications as fixture for oil quench and temper cycle. The fixtures were severely scaled, twisted and cracked. It is not a wise option to use a mild steel fixture for heat treatment applications.
RE: thermal expansion of carbon steel at temperature
RE: thermal expansion of carbon steel at temperature
RE: thermal expansion of carbon steel at temperature
RE: thermal expansion of carbon steel at temperature
Weird but that is how it works.
We were running pure Hydrogen on the inside.
The heating elements were wrapped on the outside (with a thin layer of ceramic paper underneath).
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Plymouth Tube
RE: thermal expansion of carbon steel at temperature
RE: thermal expansion of carbon steel at temperature