A carbon-carbon bolt that fails under load can stop an entire hot-zone assembly. Carbon-carbon bolts carry structural loads where metal cannot survive the heat. This article covers five facts that decide fit and load in hot joints.
Jiecheng Graphite (since 2003) machines carbon-carbon bolts to spec, and confirms thread and grade in writing.
Five facts on fit and load
Fit decides how the bolt seats. Load capacity is set by grade and section. Thread form carries the tension. Thermal behaviour allows for expansion. And inspection proves the bolt matches the drawing.
· Fit — correct seat in the joint
· Load — sized to the working tension
· Thread — carries the load
· Thermal — room for expansion
· Inspection — per-batch proof
Where carbon-carbon bolts are used
Carbon-carbon bolts fasten high-heat structural assemblies. Confirm the thread, load and temperature before ordering.
· Hot-zone structural joints
· Furnace and fixture bolts
· High-heat load connections
What to specify before you buy
Send the thread, load and temperature. Jiecheng Graphite machines carbon-carbon bolts in its Dalang, Dongguan plant and ships worldwide.
Fact | What to confirm | Why it matters |
Fit | Seat value | Sets stability |
Load | Working tension | Carries load |
Thread | Pitch + fit | Carries tension |
Thermal | Expansion gap | Stops binding |
Report | Dimensions | Proves bolt |
Buying checklist
1. Send thread, load and temperature
2. Confirm fit and load capacity
3. Specify thread and thermal clearance
4. Agree inspection per batch
5. Freeze the bolt spec
FAQ
What load can a bolt carry?
Depends on grade and section; confirm the rating.
Why does thermal clearance matter?
It stops binding and loosening at temperature.
How is a bolt proven?
By fit, load rating and per-batch inspection.
Confirming a structural bolt
A carbon-carbon bolt carries a load you cannot afford to guess. Confirm the fit, the working tension and the thermal clearance before ordering. Jiecheng Graphite machines bolts to the load you name and documents fit and thread, so the joint holds at temperature.
· Confirm fit and working load
· Set thermal clearance
· Document thread and grade
A carbon-carbon bolt holds when fit, load, thread, thermal behaviour and inspection are confirmed. Jiecheng Graphite has made carbon-carbon bolts since 2003 and keeps the spec on file.
