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Gray Cast Iron Spec Table
Gray Cast Iron KS Specifications — 2 sizes
SPS-KFCA-D4301-5015
Gray cast iron (FC) with good castability and vibration damping, used for machine tool beds, cylinder blocks, and flywheels.
Practical Notes
- Excellent vibration damping — used for machine tool beds and cylinder blocks. 10× the damping of steel.
- Low tensile strength and brittleness make it unsuitable for impact loads. Use ductile iron (FCD) for impact applications.
SPSGray Cast Iron
2 sizes| Name | Type | Tensile | Yield | Hardness | Use |
|---|---|---|---|---|---|
| FC200 | Gray Cast Iron | ≥200 | - | HB170~230 | Machine , , |
| FC250 | Gray Cast Iron | ≥250 | - | HB180~250 | Cylinder, Gear , |
Key Features
- GC (FC) series; flake graphite distribution provides excellent vibration damping and machinability
- FC200 (tensile 200 MPa) / FC250 / FC300; compressive strength is 3–4× tensile
- Good molten metal fluidity enables complex shape casting; however, ductility and impact values are very low
Key Applications
Machine tool beds/columns, engine blocks, brake discs/drums, pump housings, valve bodies
FAQ
Difference between FC200 and FC250?
Numbers indicate minimum tensile strength (MPa). FC200→200MPa, FC250→250MPa. FC250 is stronger but FC200 has better castability. FC250+ for machine tool beds.