# Extruded graphite

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

Source: https://esgraf.com/en/materials/solid-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, loads are moderate, and process anisotropy is acceptable.

**What it is used for:** heating elements and furnaces, continuous casting and dies, degassing/fluxing lances and tubes, crucibles and ingot molds, molds, 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 machined 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 machining 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 machining |
| 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.

## 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 high-density graphite?

Extruded fits rods, tubes, heaters, and furnace parts when lower loads and anisotropy are acceptable. [High-density graphite](/en/materials/solid-technical-graphite/high-density) is chosen for fine grain, greater uniformity, and precision machined 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.