Stainless Steel Casting
Stainless Steel Investment
Castings
Stainless steel is one of the most common metals poured for investment casting. Stainless steel is known for its exceptional corrosion resistance and versatility in critical industries such as food and beverage, medical, oil and gas, and petrochemical.
On a chemical level, stainless steel investment castings contain high levels of chromium which displays corrosion-resistant qualities. For example, SS304 contains up to 21% chromium. Other metal components are best poured with SS316 due to its molybdenum content. Molybdenum is useful in stainless steel alloys for its stability under harsh conditions with high thermal conductivity and a melting point of 4,753°F / 2,620°C.
Milwaukee Precision Casting specializes in pouring all types of stainless steel alloys, including the 300 series, 400 series, precipitation-hardening alloys, and more, tailored to your specific needs. While we frequently work with popular alloys like 304, 316, and 17-4 PH stainless steel, we also offer castings in 410, 416, 420, and 15-5 stainless steel.
Casting Process
Stainless Steel Casting Process
All stainless steel investment castings begin with a wax pattern formed by a custom tool. The pattern is dipped into a mixture of sand and slurry and then dried to create a ceramic mold. Next, the mold is “dewaxed” with a high-pressure process that melts out the wax, revealing a hollow ceramic shell. A molten version of the stainless steel is poured into the shell. Once the metal has solidified and the shell has been cut off, the casting can go through final steps such as sandblasting and quality inspection before being sent to additional services, if necessary, such as machining and heat treating.
Popular Stainless Steel Grades
Advantages
What are the Advantages of Stainless Steel Investment
Castings?
Castings?
Stainless steel’s biggest advantage is its excellent corrosion resistance. Unlike other materials, stainless steel castings have a built-in chromium oxide layer that provides exceptional anti-corrosive properties. These corrosion-resistant properties make stainless steel castings ideal for pump/valve, petrochemical, marine, and other industrial applications.
Other advantages include:
- Heat Resitant
- Cost-effective for Complex Parts
- High Precision & Accuracy
- Excellent Surface Finish
- Strength & Durability
- Consistent Quality
Unsure about your part design? Check out our prototyping
capabilities
Stainless Steel Alloys
Commonly Cast
Stainless Steel Alloys
304 is widely accepted in the food industry as the standard for cleanliness as well as corrosion resistance.
316 is known for its superior corrosion resistance, making it ideal for many uses including marine environments.
400 series steels are high strength and very machinable. They will tend to break rather than bend under intense pressure
17-4 is the strongest of the stainless steel family and is used on parts that cannot bend.
high strength, hardness, & corrosion resistance.
Commonly hardened through heat treatment.
Stainless Steel Casting Manufacturer
Choosing a Stainless
Steel Casting Manufacturer
When it comes to investment casting, quality, precision, and on-time delivery make all the difference. At Milwaukee Precision Casting, we take pride in being an ISO and ITAR-certified, specializing in high-quality stainless steel castings for a wide range of industries.
Located in Milwaukee, Wisconsin, our full-service produces corrosion-resistant stainless steel castings ranging from 1/10 of an ounce to 50 pounds, with industry-leading tolerances of 0.005 inches per inch. Backed by over a century of combined experience, we offer some of the fastest lead times in the industry, ensuring your project stays on track without compromising on quality.
To request a quote for your stainless steel project, fill out our form or give us a call today!
Markets We Serve
Trusted by
Demanding Industries
Commercial Firearms & Military
Milwaukee Precision Casting, Inc. specializes in components for the firearm and gun industries through the investment casting process, producing military components, commonly for AR-15, M16, M240, and M249.
Power Transmission
Milwaukee Precision Casting, Inc. (MPC) is proud to serve the industry in many areas, producing power transmission component castings that pass stringent requirements for high-voltage substation power switching and storage equipment.
Medical
Investment castings used in medical-related applications require the highest degree of quality, cleanliness and surface finish.
Auto After Market
Milwaukee Precision Casting, Inc. has extensive exposure in the automotive aftermarket, the secondary market of the automotive industry. We specialize in the manufacturing of vehicle parts, tools, and accessories for light and heavy vehicles.
Food & Dairy
Milwaukee Precision Casting, Inc. plays a major role in the production of stainless steel investment castings used in the food & dairy industry.
Construction
Milwaukee Precision Casting, Inc. (MPC) produces construction component castings for tools and equipment used in the construction industry.
Meat Processing
Milwaukee Precision Casting, Inc. produces a wide array of standard and customized investment casting products for meat processing equipment, including meat grinder parts and special attachments for machinery.
Machine Tool
Milwaukee Precision Casting, Inc. produces quality investment castings for a wide range of applications in the machine tool industry.
Waste Management
Milwaukee Precision Casting, Inc. produces a wide array of standard and customized investment casting products for wastewater treatment equipment.
Mining
Milwaukee Precision Casting, Inc. has long supported the mining and earth-moving industry with mining investment castings built for tough, abrasive environments.
Logging
Milwaukee Precision Casting, Inc. produces a wide array of standard and customized investment casting solutions for the logging industry, including forestry equipment castings, heavy equipment castings, and off-highway machinery castings.
Oil & Gas
Investment castings used in the oil and gas industry must meet the highest standards of quality, durability, and corrosion resistance to withstand extreme operating conditions.Milwaukee Precision Casting produces stainless steel castings and A356 castings used in applications such as ramps, heavy-duty locks, flame and flow control, and even material removal fingers.
Utilities
Milwaukee Precision Casting, Inc. produces a wide array of standard and customized power generation investment castings for the utilities industry.
Agriculture
Agriculture equipment operates in tough, demanding environments, which is why investment castings have been a trusted solution in the industry for decades.
Petrochemical
At Milwaukee Precision Casting, Inc., we specialize in manufacturing high-performance investment castings for the petrochemical industry, where precision, durability, and safety are paramount.
Pumps & Valves
Milwaukee Precision Castings produces near-net shape, high-quality, durable investment castings for pumps and valves.
Gallery
Stainless Steel
Casting Gallery
Frequently Asked Questions
Common Questions
Before Requesting
a Quote
What are the different types of Stainless Steel Grades for Investment Casting?
Can different surface finishes be provided for SS Investment Casting?
Can SS Investment Casting be heat treated and are these services offered?
What SS Casting sizes can Milwaukee Precision Casting, Inc. provide?
Linear Tolerances
The industry standard linear tolerances for any investment casting
process are ±.005 per
inch of length.
Geometric Tolerances
Effective part configuration is a critical element in achieving strict
tolerances for investment casting. Our team ensures a quality
experience in investment casting.
Minimal Lead Time
Built for complex applications requiring repeatable accuracy and tight dimensional control across production runs.
Accuracy of ± .005 per inch
ISO-certified quality systems with advanced inspection and full traceability from tooling to delivery.
AMS 2175 Compliance
Fast RFQ response, efficient tooling development, and scalable production capacity to meet your schedule.
Competitive Pricing
Cast, machine, finish, and inspect under one roof — reducing lead times and supply chain complexity.
ISO 9001:2015 Certified
DFM reviews and casting optimization from experienced engineers who understand your application requirements.
Advanced Inspection
X-ray, MPI, FPI, HIPing, and dimensional validation ensure every component meets your spec before shipment.
Get a Quote
Request a Precision
Casting Quote
We cast a broad range of alloys — from corrosion-resistant stainless grades to
high-strength tool steels — engineered for demanding industrial, defense, and
energy applications.
Fast RFQ Response
Typical quote turnaround within 1–2 business days
Engineering Support
DFM review and casting optimization included with every quote
Scalable Production
Prototype to high-volume production capability
Full Technical Consultation
Material selection, tolerance review, and process recommendations
