Carbon Steel Investment Castings
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:
- 4130: MIL-S-22141B & AMS 5336
- 4340: MIL-S-22141B & AMS 5338
- 4140: MIL-S-22141B & AMS 5338
- 4150: AISI
- 4615
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.
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 Investment Casting Grades
| Alloy | Common Usage | Applications |
1018 & AISI 1020 |
The 1000 series is the softest of the three common carbon steels will more likely bend rather than break under intense pressure. They are commonly used to make cranks, handles, and braces. | |
4130SAE 4140 & 4140 MIL-S |
The 4100 series is a high strength material that is used when deformation of a part is not allowed. They are commonly used to cast firearm components and ratchets. | |
SAE 8620 |
The 8600 series steel is the middle ground between 4100 and 1000 series. 8600 series is stronger than 1000 series but will bend prior to breakage. They are commonly used to cast firearm components, housings, and nozzles. |
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 foundry can offer, better than most.
Please contact us and let us know how we can serve your carbon steel investment casting needs.
Carbon Steel Cast Parts Gallery
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