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Carbon graphite blanks from St. Marys Carbon

Carbon Blanks and Blocks for Precision Machining and Demanding Applications

When machining precision components, the starting material must perform predictably under electrical, thermal, mechanical, and environmental demands. Carbon graphite blanks and blocks are used when applications require consistent material behavior and efficient machining in demanding conditions.

  • Machining-ready blanks with fast lead times
  • Grades matched to electrical, thermal, and mechanical needs
  • Cut sizes and tolerances that reduce scrap and rework
  • Material guidance for your specific application

Type of Customized Carbon Graphite Blanks

Our carbon graphite blanks can be custom-manufactured to your specific requirements. We develop our own proprietary carbon grades, so we will work closely with you to develop the right blanks for your customized products. The type of blank that you require depends on your specific application. We provide the following options:

Carbon Rod Blanks

Reliable stock for machining bushings, bearings, seal rings, vanes, and current-transfer parts. Available saw-cut for your secondary ops or ground to tighter tolerance to speed assembly and reduce finishing.

Common uses:

  • Bearings & bushings
  • Mechanical seal faces
  • Pump/compressor vanes
  • Electrical/brush components

What to specify: OD/ID/length, finish (saw-cut vs ground), tolerance range, target environment, and grade preference if known.

Carbon Plate / Block Blanks

Flat stock and thick blocks for rings, segments, plates, fixtures, and large components. Supplied cut-to-size and optionally ground for thickness/flatness control.

Common uses:

  • Mechanical seal plates
  • Wear plates
  • Furnace/kiln fixtures
  • Machining billets

What to specify: L×W×T (or block dims), flatness/parallelism needs, finish, and service conditions.

Carbon Slug Blanks

Short lengths and custom slugs for small turned/milled parts where yield and spindle time matter. Ideal when you need repeatability with minimal prep.

What to specify: Diameter/length, length tolerance, chamfer/deburr needs, finish, and operating environment.

Environments, Conditions and Applications for Industrial Carbon Blanks

Electrical Transmission

Support dynamic electrical transmission applications with material properties selected for stable electrical performance.

Self Lubricating

Dry Running / Self Lubricating

Enable dry-running operation without external lubrication to reduce maintenance and system complexity.

Anti Welding

High Temperatures

Withstand extremely high operating temperatures while maintaining strength and dimensional stability.

Low Temperature

Low Temperatures

Maintain key material characteristics in extremely low-temperature operating environments.

Corrosive & Harsh Environments

Corrosive & Harsh Environments

Resist degradation in corrosive and harsh environments to support long-term performance.

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High Friction

Reduce friction and resist wear in high-friction applications to extend component life.

Sanitary

Sanitary Environments

Support sanitary applications such as food, beverage, and medical environments where material cleanliness is critical.

Submerged / Marine Environments

Submerged / Marine Environments

Operate reliably in submerged applications, including freshwater and saltwater environments.

High Altitude

High Altitude

Maintain performance at high altitudes using grades designed for reduced pressure conditions.

HOW CAN WE HELP YOU ?

Industrial Carbon Blank Details

Working Temperature for Carbon Blanks & Blocks

  • Minimum
    • Runs in cryogenic temperatures (no true minimum value)
  • Maximum
    • Carbon/Graphite up to 700 F
    • Electrographite up to 900 F
    • Electrographite with inorganic additives up to 1150 F
      • Other oxidation inhibitors (impregnants) up to 1200 F
    • In inert/neutral environments
      • Carbon/Graphite up to 1600 F
      • Electrographite up to 5000 F

Engineered for Demanding Environments

  • High-Temperature: Furnaces, ovens, kilns, and hot gas streams
  • Corrosive/Harsh Media: Chemicals, slurries, and process fluids
  • Sanitary Processes: Food, beverage, and pharmaceutical lines
  • Marine/Submerged: Pumps, seals, and bearings in water or process liquids
  • High-Altitude / Vacuum / Inert: Aerospace, vacuum furnaces, and inert gas systems
  • Dry-Running / Self-Lubricating: Avoids galling where traditional lubrication fails

Finish & Tolerances

  • Saw-cut: Cost-effective stock for secondary machining
  • Precision-ground: Dimensional/tolerance control to speed assembly and reduce rework
  • Surface considerations: Specify roughness, flatness, straightness, and parallelism where critical

Average Oxidation & Chemical Resistance

  • Carbon grades are resistant to most chemicals

Spring Pressure Range

  • Application dependent

Typical Applications (Machined from Our Blanks)

Frequently Asked Questions (FAQs) 

How carbon graphite will make your products & parts superior

Download Guide

Industrial Carbon Graphite Rods, Plates & Slugs Data sheet

Data Sheet

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For more information about our services, call us at 814.781.7333

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