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Investment Casting Services

Fathom offers metal casting prototype services in a variety of materials including magnesium, aluminum, zinc, and bronze, which are created with a plaster, sand, investment or permanent molding process.

The Process

1. A master model is createdfrom the master model
2. The “Master Molds” are used to generate plaster molds
3. Drying of mold (typically 3-5 days)
4. Metal is poured into the plaster mold
5. Cleaning and prepped for shipping or machining

Wax is injected into an aluminum die to produce a pattern that is an exact replica of the part to be produced. For every casting, a wax pattern must be manufactured. The patterns are clustered around a coated sprue and repeatedly dipped into an agitated vat of ceramic and allowed to dry. After a shell thickness of approximately 3/16″ has been built; the molds are dewaxed by either flash firing at high heat (1,400° F.) or autoclaving (pressure and steam). The hollow shells are then preheated to 800-2,000° F. depending on the alloy to be poured and the molten metal cast immediately into the hot shell. After cooling, the ceramic is vibrated and blasted off the metal parts and discarded. The balance of the cleaning operations (cut off, grind, heat treat, straightening, blast) are straight forward and quite similar to the other casting processes.



Low Alloy Steels Investment Castings Martensitic Stainless Steel Investment Castings Austentic Stainless Steel Investment Castings Duplex Stainless Steel Investment Castings Ferritic Stainless Steel Investment Castings Tool Steel Investment Castings
1020 410 303 ASTM 890 Grade 4A 409 A2
1045 416 304, 304L 430 A6
1050 420 316, 316L 436 D2
1095 431 316 Non-Mag 446 D5
4130 15-5PH CF-8, CF-3 L6
4140 17-4PH CF-8M, CF3M M2
4150 440A 330 M52
4340 440C 347 O1
6150 CA-6NM 20-CB3 S5
8620 Alloy 20, CN-7M S7
8650 CF10-SMnN


Copper Base Alloys Investment Castings Nickel Base Alloys Investment Castings Cobalt Base Alloys Investment Castings Aluminum Investment Castings
CDA 872 NI-B CoAlloy 3 356
CDA 875 NI-C CoAlloy 6
CDA 876 NI-X
CDA 903 NI-625

Comprehensive Capabilities for Rapid Manufacturing

At Fathom we offer a unique advantage of speed and agility-our experts help companies go from concept to prototype to manufacturing in ways not previously possible. 

3D Printing / Additive Manufacturing
90+ Machines  
SLS / / Two-day  SLA / / Next-day 
FDM / / Next-day DMLS / / Three-day 
PolyJet / / Same-day MJF / / Two-day
Injection Molding

30 Second Quotes

Prototype Tool / / As soon as 10 days

10K Parts / / 10 days

Production Tool / / As soon as 3 weeks

CNC Machining

3 & 5 Axis Milling & Turning
(Plastics, Composites and Metals)

Tolerance Accuracy Range
from +/-0.001″ to 0.005″

Urethane Casting

Injection Molding Adjacent
without High Costs of Metal Tools

Most Commonly Used for High-Volume
Prototyping & Bridge to Production

Let’s get started.

Fathom is driven by advanced technologies and methods that enhance and accelerate today’s product development and production processes.