# Extruded graphite

Extruded graphite for rods, tubes, profiles, degassing lances, dies and heating elements. Inventory and CNC machining in Mexico.

Source: https://esgraf.com/en/materials/technical-graphite/extruded

**Extruded graphite** is technical graphite produced by **extrusion and graphitization**, supplied as **rods, tubes, profiles and blocks** for constant-section parts. It combines thermal and electrical conductivity with dimensional stability at elevated temperature — the usual choice when the section is constant and the process anisotropy is acceptable.

**What it is used for:** continuous casting and dies, degassing/fluxing lances and tubes, crucibles and ingot molds, molds, heating elements, contacts and thermal profiles. For rod or tube cuts without a finished part, [cut to size](https://esgraf.com/en/services/block-bar-plate-cutting); for CNC geometry, [graphite machining](https://esgraf.com/en/services/graphite-machining).

The **typical ranges** in the technical panel cover medium-grain industrial grades (≈0.25–0.8 mm). The exact value is confirmed at quote according to diameter, grain orientation and application.

Inventory and CNC in García, N.L., with shipments to Mexico and the Americas.

## Properties and grain orientation

Extrusion aligns the grain: **with-grain** (∥) properties usually show higher conductivity and flexural strength than **against-grain** (⊥). When designing lances, tubes and heating elements, the critical orientation must be stated.

| Property | Typical range (family) |
| --- | --- |
| Apparent density | 1.57–1.78 g/cm³ |
| Open porosity | 15–28 % |
| Flexural strength | 7–23 MPa |
| Thermal conductivity | 100–190 W/m·K |
| Grain size | 0.25–0.8 mm |
| Ash content (industrial grades) | ≈0.08–0.2 % |

Typical industrial service runs around **1.72–1.75 g/cm³** and **130–190 W/m·K**; more porous or denser series are available depending on the duty.

## Formats and typical parts

| Format | Common use |
| --- | --- |
| Rods / rounds | Electrodes, heating elements, stock for CNC |
| Tubes | Fluxing, degassing, heat exchangers |
| Profiles / blocks | Dies, molds, plates and ingot molds |
| Mini-rods | Contacts, small constant-section parts |

Optional treatments (anti-oxidation, impregnation) extend life in aluminum baths and corrosive gases.

## When not to use extruded graphite

For fine-detail EDM, critical isotropy or micrometer grain, use [high-density graphite](https://esgraf.com/en/materials/technical-graphite/high-density) (isostatic / isomolded). For specific EDM electrodes, see [EDM graphite](https://esgraf.com/en/materials/technical-graphite/edm).

## Technical properties

| Property | Value |
| --- | --- |
| Apparent density | 1.57–1.78 g/cm³ |
| Flexural strength | 7–23 MPa |
| Thermal conductivity | 100–190 W/m·K |
| Grain size | 0.25–0.8 mm |
| Open porosity | 15–28 % |

## Advantages
- High thermal and electrical conductivity
- Natural formats in rod, tube and profile
- Good machinability in constant sections
- Industrial and anti-oxidation grades for metallurgy

## Presentations
- Bars
- Tubes
- Profiles
- Extruded blocks

## Frequently asked questions

### What is extruded graphite?

It is technical graphite formed by extrusion and graphitization. The process orients the grain in the extrusion direction (anisotropy). It is used in rods, tubes, profiles, lances and thermal elements when the section is constant.

### When should you choose extruded over isostatic graphite?

Extruded is the right choice for rods, tubes and profiles when anisotropy is acceptable and conductivity or long formats are the priority. Isostatic is chosen for fine grain, greater uniformity and detailed CNC or EDM parts.

### Which grades are used for aluminum degassing?

Fine-grain extruded grades with anti-oxidation treatment when the bath and the gas require it. The exact grade is confirmed by application engineering at quote.