Verified microstructure
Nodularity and matrix measured on every heat for consistent mechanical behaviour.
Overview
Why cap quality matters
Insulator caps connect the insulator to the line hardware and carry its full mechanical load, so sound material and consistent properties are essential.
We produce caps and fittings in SG iron with chemistry confirmed before pouring and microstructure and hardness recorded heat-wise. Grade, dimensions and testing are agreed to your drawing and specification.
Material
SGIRON
To your specification
Weight
0.5–200KG
Per piece
Testing
EveryHEAT
Spectro, micro, hardness
System
ISO9001
Certified
Typical applications
- Disc insulator caps
- Line hardware
- Suspension fittings
- Clamps
- Transmission lines
- Distribution lines
Grades
SG iron grades
| Grade (IS 1865) | Tensile min (MPa) | 0.2% proof min (MPa) | Elongation min (%) | Typical HB | Matrix |
|---|---|---|---|---|---|
| SG 400/15 | 400 | 250 | 15 | 130–180 | Ferritic |
| SG 450/10 | 450 | 310 | 10 | 160–210 | Ferritic |
| SG 500/7 | 500 | 320 | 7 | 170–230 | Ferritic-pearlitic |
| SG 600/3 | 600 | 370 | 3 | 190–270 | Pearlitic-ferritic |
Typical values on separately cast test bars. Final properties depend on section thickness and the agreed specification.
Capability
Built for power sector requirements
Dimensional consistency
High pressure moulding keeps the critical cap geometry repeatable across production.
Documented quality
Heat-wise records under ISO 9001, with test reports available on request.
FAQ
Frequently asked questions
Can't find your answer? Call +91 88600 73338 or email sales@ferrotechalloys.com.
What material do you use for insulator caps?
We cast insulator caps in SG (ductile) iron. The exact grade is agreed to your drawing and specification.
How do you ensure consistent strength?
Each heat is checked for chemistry by spectrometer and CE analyser before pouring, and for microstructure and hardness afterwards, so properties stay within your specification.
Can you work to our drawing and inspection plan?
Yes. Share your drawing and inspection requirements with your enquiry and we will confirm testing and documentation in our quotation.
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