Formlabs® Alumina 4N


Alumina 4N Resin

99.99% purity technical ceramic with exceptional performance

Formlabs Alumina 4N Resin is a 99.99% pure alumina technical ceramic with 98.6% relative density, and exceptional thermal, mechanical, and conductive properties — comparable to traditionally manufactured alumina (Al2O3).

Produce ceramic components without expensive tooling.

Formlabs Alumina 4N resin is a high-density and high-purity technical ceramic SLA 3D printing material with exceptional performance in extreme environments: thermally resistant, hard, abrasion resistant, mechanically strong, and chemically inert.

speak to an expert

Image shows 3D printed parts with Alumina 4N ceramic resin from Formlabs

Material Performance*



Proto3000_Icons_Tensile Strength

400 MPa


1500 °C


Proto3000_Icons_Tensile Modulus

390.0 GPa


*Internally measured data by Formlabs. Material properties may vary based on part geometry, print orientation, print settings, and firing schedule used.
**Currently testing at an independent testing lab

Reinvent the Way You Manufacture.

De-risk supply chains, improve part performance and personalize products for your customers. Welcome to AM 2.0

Connect with Our experts to learn how

The Advantages of Using Formlabs Alumina 4N in SLA 3D Printing

Easy-to-use Proto3000 Icon

Affordable & Easy to Use

Alumina 4N resin is 10x times cheaper than other alternatives and is the easiest-to-use ceramic material in SLA 3D printing.

Image shows Formlabs Alumina 4N ceramic resin being poured

Proto3000_10x Faster and cheaper icon

Shortened Turnaround Time & Reduced Costs

Avoid costly tooling and molds to lower production expenses and accelerate the end-to-end process, resulting in a faster overall development cycle.


Image shows 3D printed parts with Alumina 4N ceramic resin from Formlabs

Freedom of Design

Produce ceramic elements featuring intricate internal passages, lattice frameworks, and intricate geometries, unattainable through conventional alumina production methods. Improve parts while ensuring both quality and performance remain uncompromised.

Image shows a multitude of 3D printed parts with Formlabs Alumina 4N ceramic resin

Validated_Process icon proto3000

Extreme Performance

Formlabs Alumina 4N material performs well in extreme applications with a max working temperature of 1500 °C. It maintains an impressive flexural strength of over 400 MPa and resists compression and deflection with a modulus of 380 GPa.

Image shows two 3D printed parts with Formlabs Alumina 4N ceramic resin


Many industries can benefit from using Formlabs Alumina 4N 3D printing material, such as the defence industry, manufacturing, automotive or chemical industry.

And, to name a few:

Proto3000 Icon_energy returnHigh voltage components: enclosures, connector housings and covers, terminal blocks


Proto3000_Icon_Long Chain ChemistryChemical resistance: manifold pipes, mixing blades and pipes


Proto3000_Icon_Temperature RaiseThermal protection: spark plug insulators, electrical mounting, insulating housings or tubes


Industries-icon-Proto3000Foundry tools for metal casting: cores, crucibles, gating, sprues, mixing tools, thermocouple sheaths, metal filters

Proto3000 3D Design icon

Design Guidelines for Alumina 4N


Alumina 4N Quick Start Guide

Main Technical Specifications

Resin Properties
Resin Properties
  • Purity: 99.99%
  • Particle Size: d90 < 1 micron
Green State Properties³
Green State Properties³
  • Flexural Strength: 3.6 MPa
  • Flexural Modulus: 24.5 MPa
  • Shore D Hardness: 70D
  • Colour: Off-White
Sintered State Properties³
Sintered State Properties³
  • Point Flex Strength (XY): 400 MPa
  • Point Flex Strength (Z): 320 MPa
  • Relative Density: 98.60%
  • Vickers Hardness: 1500
  • Young's Modulus: 390 GPa
  • Fracture Toughness: 3-5 MPa √m
  • Surface Roughness: 0.5-3 mircrons Ra
Electrical Properties
Electrical Properties
  • Electrical Resistivity: > 1x1014 ohm metre (Ω⋅m)
  • Dielectric Loss tan delta (tan δ),1 MHz: 9x10-5
Thermal Properties
Thermal Properties
  • Coefficient of Thermal Expansion: 5 ppm/K
  • Maximum Working Temperature: 1500 °C
  • Thermal Conductivity: 32 W/m·K

¹Material properties may vary based on part geometry, print orientation, print, settings, and firing schedule used.
²All sintered parts were fired using a 2-oven conservative firing schedule (schedule #1)
³Internally measured data; Currently testing at an independent testing lab

material safety datasheet icon Proto3000 additive manufacturing

Material Safety Datasheets

Access Database