Ultracur3D® ST 45 B 3D printing material

Are you looking for a resistant resin material? Here are all the information you need about Ultracur3D® ST 45 B.



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Ultracur3D® ST 45 B Material Guide

What is Ultracur3D® ST 45 B?

Ultracur3D® ST 45 B is a reactive urethane photopolymer developed by Forward AM for tough applications.

This resin material delivers high strength, as well as long-term toughness and impact resistance. If you are looking to manufacture high-performance functional parts with an interesting accuracy and an advanced mechanical strength, Ultracur3D® ST 45 will perfectly suit your project.

Ultracur3D® ST 45 B parts are 3D printed in black using Digital Light Processing (DLP) technology, a 3D printing technique particularly adapted to mass-production. Please keep in mind that you will have to respect specific design guidelines to avoid any problems during the additive manufacturing process. Be sure to check the material design guidelines while creating your 3D file and before you send it for 3D printing.

What are the possible applications for Ultracur3D® ST 45 B?

Important: This material is not adapted for parts in contact with fluids.

  • Complex aesthetic parts

Ultracur3D® ST 45 B is a perfect resin material to create the most complex parts. Benefit from a good surface finishing for your aesthetic 3D printed parts.

  • High details

Are you looking for a material to manufacture your highly detailed and textured parts? Thanks to this Ultracur3D® ST 45 B, benefit from a material offering high accuracy for your 3D printed parts.

  • Impact resistance

Charpy notched: 2.66 kJ/m2
Elongation at break: 21.4 %

Make the most of this Ultracur3D® ST 45 B to print your projects requiring impact resistance and toughness. 


The printing price of your design is calculated automatically the moment it is uploaded. As you modify your object (changing material, finishing, size, using our hollowing feature, etc.) you will note that the price changes automatically. The pricing is based on a series of factors, including total volume, object size, and bounding box – to name a few.

The estimated shipping time is also calculated automatically as the object is uploaded and each time you make a modification on it. Delivery time should be added to processing time.

For more information, check our pricing page

How does DLP technology work?

DLP technology is a resin 3D printing technology, the process uses a light source to cure the resin. The resin is contained within a vat, or tank, cured against a build platform, which slowly rises out of the tank as the part is formed, layer by layer. The digital light projector is the light source of a DLP 3D printer. The DMD (Digital Micromirror Device) is a component made of thousands of micromirrors. These micromirrors are used for navigating the light beam projected by the digital light projector.

What are the finishing options available?

Raw: Supports are removed from the model. Support scars/bumps will still be visible

We remove the support structures during our post-processing steps. The surfaces where the support structure comes in contact with the part will be visible but can be sanded and finished by a technician upon request

This means there are considerations you should keep in mind during the design of your part to facilitate not only the successful construction of your part but also the removal of support structures and the finishing of your surfaces.

Maximum size

192 × 108 × 330 mm (X – Y – Z)

The maximum size of your models are limited by the physical size of our 3D printers – nothing can be printed larger than the printer bed.

Layer thickness : 100µm
Accuracy : ± 200µm 

Minimum wall thickness  0.6 mm

Stemmed elements with support0.6 mm
Stemmed elements without support1 mm

Minimum height and width details

Embossed : 0.3 mm 

Engraved : 0.3 mm

Ratio Depth / width1/1 
A detail’s minimum precision is mainly determined by the resolution of our 3D printers. However, during the cleaning process, a fine layer of detail can also be lost. In order for a detail and text to be visible we recommend following our recommended sizes at the very least.It’s possible that particularly fine embossings and engravings will not be visible, as the carving could get filled with excess powder that is later unable to be cleaned out. If an embossing or engraving is an essential part of your design we recommend making them as deep as possible. To ensure a better powder removal (thus a better detail visibility), the width of your details must be at least as big as depth.
Enclosed parts ?No
Interlocking parts ?No

Minimum spacing between fixed walls0.4 mm

Hollowing ?No

It is not possible to print a 3D file containing several objects, that’s why we cannot accept files that contain clusters of multiple objects. However, don’t worry, this doesn’t mean you’ll pay more for your multiple objects: to reduce the 3D printing cost, we set up a different price calculation as soon as you order two or more objects with this technology.

You can also use our online tools and see our tricks and tips on how to reduce your 3D printing price.

To get more information on our additive manufacturing service, you can contact our qualified sales team.

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Value Norm
Tensile Strength52.5 MPaASTM D638
E Modulus2 040 MPaASTM D638
Elongation at Break21.4 %ASTM D638
Charpy notched, 23 °C2.66 kJ/m2ISO 179-1
HDT (0.45 MPa)63°CASTM D648

Ready to 3D print with Ultracur3D® ST 45 B?

With Sculpteo’s online 3D printing service you’re just a few clicks away from professional Ultracur3D® ST 45 B 3D printing. Your 3D model is printed with the highest quality and delivered straight to your door. 

Get started now!

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