Production Machining of Gray Iron

What is Gray Iron?

Gray iron, or gray cast iron, is the most commonly used type of cast iron due to its excellent vibration damping, thermal conductivity and castability. Its name comes from the gray appearance of its fracture surface, caused by the graphite flakes in its microstructure. Graphite flakes make gray iron easy to machine and ideal for components requiring dimensional stability and high wear resistance without extreme tensile loads.

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Why Choose HyPro for Gray Iron Machining

  • Machining Efficiency: Gray iron’s free-machining properties allow for faster cycle times and longer tool life, which we optimize using advanced CNC setups.
  • Superior Surface Finish: Our equipment produces clean, consistent finishes suitable for sealing surfaces, bearing bores and more.
  • Reliable Sourcing: We work with top-tier foundries to source quality gray iron castings, guaranteeing consistent material properties and full certification.
  • Scalable Production: From small to large volumes, our multi-plant machining capacity supports scalable manufacturing and just-in-time delivery.
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Gray Iron Parts We Machine

HyPro machines gray iron components for applications requiring dimensional stability and high wear resistance without extreme tensile loads. Common part types include:

  • Engine blocks and cylinder heads
  • Pump housings and impellers
  • Gearbox and clutch housings
  • Brake components
  • Machine tool bases and bearing housings

We work with customers across industries to machine iron parts to meet demanding performance and dimensional requirements.

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Diverse Machining Solutions for Every Sector

Industries We Serve

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Agriculture

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Construction

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Off-Highway

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On-Highway

industrial engine

Engine

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Industrial

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Military-Defense

marine engines out of the water

Power Sports-Marine

large building crane

Material Handling

industrial generators

Power Generation

ISO Certified & ITAR Compliant for Superior Quality

Every HyPro facility maintains ISO 9001:2015 registration. Our quality systems include:

  • 14 DCC Coordinate Measuring Machines (LK/Metris/Nikon)
  • White Room Testing capabilities
  • Statistical analysis through InfinityQS
  • QUEST Management System
  • ITAR registration and compliance

Partner with HyPro for End-to-End Component Manufacturing

Whether you're looking for a reliable partner for complex castings or a fully integrated contract manufacturer, HyPro delivers unmatched process depth and manufacturing expertise. Contact our team today to learn how we can support your next machining, assembly or sourcing project.

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