Steel investment castings
We produce steel investment castings by the lost wax process: parts from 0.001 to 5 kg and up to 250 mm in over 60 steel grades, including stainless and heat-resistant steels. Tolerances to VDG P690 D1, prototypes from 3D-printed wax patterns and in-house CNC machining.
Prototypes
The printer for the Rapid Prototyping process
This innovative technology uses a method of applying liquid material to a printing plate, enabling the creation of wax models with exceptional design freedom. Models made of 100% wax are completed within a few hours, making it ideal for producing small series, prototypes, and unique parts.
Support software
We are now assisted with the design of the gating system by the simulation software Magmasoft. This software not only simulates the casting and solidification process, but also predicts potential internal defects or heterogeneous inclusions in the structure of the future casting. In addition, it optimizes the entire casting process according to predefined criteria, even at the early stage of technological preparation for production, directly within CAD data on the PC.
Technology
The advantage of precision casting technology is the ability to produce geometrically complex parts that closely resemble the optimal shape, while also utilizing materials that are difficult or completely impossible to machine.
Water-soluble, removable cores - this technology is used to create complex internal cavities and shapes in the casting that cannot be achieved with a standard metal mold for wax models.
This technology, however, requires the creation of a model device for the injection of soluble cores, with the wax REMET being used for the production of these cores
Thermal processing
In collaboration, we ensure the basic heat treatment of castings.
- normalizing annealing
- soft annealing
- Annealing for dissolution according to customer requirements
- hardening
Parameters of Castings
| Minimum weight : | 0.001 kg |
| Maximum weight: | 5 kg |
| Maximum dimensions: | 250 mm |
| Minimum wall thickness: | 2 mm |
| Surface roughness: | Ra = 6.3 (N9 according to DIN) |
| Dimensional tolerances: | VDG P690 D1 |
| Delivery times: | 4–6 weeks after the mould is made |
| Delivery times for castings: | By agreement (depending on batch size, foundry capacity, etc.) |
Annual production of the foundry: 200 tons of castings per year.
Linear tolerances for untoleranced dimensions (VDG P690)
The table applies to untoleranced dimensions on the drawing and is based on the VDG P690 standard, which covers the tolerances for investment casting. The position of the tolerance zone relative to the nominal dimension can be chosen freely. It is best to distribute the tolerance zone evenly around the nominal dimension.
| Nominal dimension range (mm) | Accuracy class D1 | Accuracy class D2 |
|---|---|---|
| 0–6 | 0.30 | 0.24 |
| 6–10 | 0.36 | 0.28 |
| 10–18 | 0.44 | 0.34 |
| 18–30 | 0.52 | 0.40 |
| 30–50 | 0.80 | 0.62 |
| 50–80 | 0.90 | 0.74 |
| 80–120 | 1.10 | 0.88 |
| 120–180 | 1.60 | 1.30 |
| 180–250 | 2.40 | 1.90 |
| 250–315 | 2.60 | 2.20 |
You can also download the table as a PDF.
Forms and Models
We process drawing documentation for castings, master models, molds, and auxiliary equipment. We work in 3D AutoCAD and SolidWorks.
In collaboration, we ensure the production of complex metal master models and molds made of steel or duralumin using the latest technologies.
Materials
Our foundry focuses on the production of castings made from austenitic steels. Based on requirements, we can supply castings made from various steels according to ČSN and DIN standards, suitable for melting in open furnaces.
The following types of steel are used for casting production:
- carbon
- low and medium alloyed
- corrosion-resistant austenitic and martensitic
- instrumental
- heat resistant
List of cast materials
Steel grades we cast, with the Czech ČSN designation, material number (W.Nr.) and grade name.
| Steel type | W.Nr. | Designation | ČSN (CZ) |
|---|---|---|---|
| Carbon steel | 1.0442 | GS200 | 422602 |
| Carbon steel | 1.0619 | GS240 | 422643 |
| Carbon steel | GS-52 | 422650 | |
| Carbon steel | 1.1191 | GS-60 | 422660 |
| Carbon steel | GS-62 | 422670 | |
| Carbon steel | 422735 | ||
| Carbon steel | 422819 | ||
| Carbon steel | 422830 | ||
| Low and medium alloy steel | 16MnCr5 | 14220 | |
| Low and medium alloy steel | 50CrV4 | ||
| Low and medium alloy steel | 1.7243 | 18CrMo4 | 422842 |
| Low and medium alloy steel | 1.7231 | 42CrMo4 | 422843 |
| Low and medium alloy steel | 1.7218 | 25CrMo4 | |
| Low and medium alloy steel | 1.6511 | 36NiCrMo4 | |
| Low and medium alloy steel | 1.2842 | 90MnCrV8 | |
| Low and medium alloy steel | 1.6747 | 30NiCrMo16-6 | |
| Low and medium alloy steel | 1.7379 | 17CrMo9-10 | |
| Martensitic stainless steel | X10Cr13 | 422905 | |
| Martensitic stainless steel | GX20Cr14 | 422906 | |
| Martensitic stainless steel | 1.4116 | X50CrMoV15 | |
| Martensitic stainless steel | 1.4034 | X46Cr13 | 17029 |
| Martensitic stainless steel | 1.4059 | GX22CrNi17 | |
| Martensitic stainless steel | 1.4340 | GX40CrNi27-4 | |
| Austenitic stainless steel | AISI 304 | ||
| Austenitic stainless steel | AISI 316 | ||
| Austenitic stainless steel | 1.4308 | GX5CrNi19-10 | |
| Austenitic stainless steel | 1.4581 | GX5CrNiMoNb18-10 | |
| Austenitic stainless steel | 1.4408 | GX6CrNiMo18-10 | |
| Austenitic stainless steel | 422953 | ||
| Austenitic stainless steel | 422993 | ||
| Tool steel | 60WCrV7 | 19733 | |
| Tool steel | 19436 | ||
| Tool steel | 19452 | ||
| Tool steel | 1.2067 | 100Cr6 | |
| Heat-resistant steel | 1.4848 | X40CrNiSi25-20 | 422952 |
| Heat-resistant steel | 1.4857 | X40NiCrSi35-25 | 422955 |
| Heat-resistant steel | 2.4879 |
Other steel grades can be cast on request. You can also download the list as a PDF.
Finishing process
CNC machining
- Turning
- Drilling
- Grinding
Surface finishes
- Zinc
- Nickel plating
- Dyeing
- Polishing
Machining capacities
| Machine name | Technology | Starts (mm) |
| Fanuc Robodrill D21LiB5 | Multi-axis CNC milling | 700x400x330 |
| Haas Super Minimill 2 | 3-axis CNC milling. | 500x400x300 |
| Doosan Lynx 300 | CNC turning | Rotational diameter is 450, length 765. |
| Doosan Lynx 2100 LY | CNC turning | Rotational diameter 300, length 300 |
| Goodway GLS 200 | CNC turning | Rotational diameter is 400, length 500. |
