Carbon Steel Casting
Carbon Steel Investment
Castings
Carbon Steel Casting utilizes carbon steel alloys for the precision investment casting process. For industries such as agriculture, firearms, and automotive that require strong, durable, and moderately machinable parts, carbon steel castings are commonly utilized. Carbon steel has exceptional hardness, therefore it’s more brittle and doesn’t bend as easily as stainless steel or aluminum.
Depending on its application, the main drawback of carbon steel is its lack of corrosion resistance due to low chromium content. If your component will be exposed to water or any corrosive environments, we recommend selecting another alloy, such as stainless steel 304 for your investment castings.
However, if there is no risk of corrosion for your metal component, carbon steel is a useful alloy for affordable, high-volume investment castings.
1000 Series Carbon Steel
1000 series carbon steel casting alloys are softer than other carbon steel alloys due to slightly lower carbon levels. 1000 series carbon steel casting alloys are often used for parts that require durability but can undergo minor deformation under intense pressure, such as cranks or handles.
1000 Series Carbon Steel Alloys & Specs:
- 1010: AISI
- 1018: AISI
- 1020: MIL-S-81591
- 1025: ASTM A 2
- 1030: MIL-S-81591
- 1040: MIL-S-22141B
- 1050: MIL-S-22141B
- 1060: AISI
4000 Series Carbon Steel
For parts where function is inhibited under any sort of deformation, 4000 series carbon steel series is utilized. This is important for firearms and automotive components. With high hardness, these castings are extremely strong and won’t bend under pressure.
4000 Series Carbon Steel Alloys & Specs:
6000 Series Carbon Steel
6000 series carbon steel has high shock resistance under impact, which is why it’s common for moving parts such as gears and engine components. We currently can pour 6150 carbon steel for investment castings.
1000 Series Carbon Steel Alloys & Specs:
- 1010: AISI
- 1018: AISI
- 1020: MIL-S-81591
- 1025: ASTM A 2
- 1030: MIL-S-81591
- 1040: MIL-S-22141B
- 1050: MIL-S-22141B
- 1060: AISI
8600 Series Carbon Steel
8600 series carbon steel is the middle ground series for carbon steel. Although it’s stronger than 1000 series, it’s softer than 4100 series and can experience deformation. 8600 series is most common in circumstances that warrant a part to bend before it breaks.
8600 Carbon Steel Alloys & Specs:
- 8620: MIL-S-22141B
- 8630: MIL-S-22141B
- 8635: MIL-S-22141B
- 8640
Contact us today to request a quote for 1000 series, 4000 series, 6000 series, and 8000 series carbon steel investment castings.
Carbon Steel Casting Grades:
Carbon Steel Alloys
Carbon Steel Investment
Casting Grades
secondary operations
Machining, Testing & Treating
We also have the capabilities of furnishing secondary operations such as machining, non-destructive testing, heat treat, and assembly. Our cosmetics are as good as any can offer, better than most.
Please contact us and let us know how we can serve your carbon steel investment casting needs.
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
Carbon Steel Cast
Parts Gallery
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
