Custom Carbon Steel Castings
High-strength, impact-resistant carbon steel sand castings engineered for extreme industrial environments. Fully compliant with ASTM standards and delivered Ready-To-Assemble.
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When ductile iron or gray iron cannot meet the structural demands of high-stress applications, custom carbon steel castings are the superior choice. Through our advanced resin sand casting process, we produce heavy-duty carbon steel parts that offer outstanding tensile strength, ductility, and fatigue resistance.
At Kurt Foundry, we specialize exclusively in sand casting. This allows us to pour medium to large-scale cast carbon steel components—ranging from 50 lbs to over 5,000 lbs—without the size limitations of investment casting or the high tooling costs of forging.
View Material GradesCommon Carbon Steel Casting Grades
Our in-house metallurgy lab strictly controls the chemical composition during the melting process. Below are the most common cast carbon steel grades we pour in our sand foundry.
| Standard / Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Common Applications |
|---|---|---|---|
| ASTM A216 WCB | 485 – 655 | ≥ 250 | High-pressure valve bodies, pump casings, fittings. |
| ASTM A216 WCC | 485 – 655 | ≥ 275 | Similar to WCB but with higher yield strength for severe service. |
| ASTM A27 Grade 65-35 | ≥ 450 | ≥ 240 | General structural purpose sand castings, brackets, and gears. |
| ASTM A27 Grade 70-36 | ≥ 485 | ≥ 250 | Heavy machinery bases, mining equipment components. |
| DIN EN 10213 / 1.0619 | 450 – 600 | ≥ 240 | European standard equivalent for pressure-containing steel castings. |
Our Carbon Steel Sand Casting Process
Casting steel requires precise control over shrinkage and temperature. Our systematic approach ensures zero-defect internal structures and dimensional accuracy.
1. DFM & Casting Simulation
We utilize advanced casting simulation software to design optimal gating and riser systems, specifically combating carbon steel’s high shrinkage rate.
2. Resin Sand Molding
Our automated molding lines use high-grade resin sand, creating exceptionally rigid molds that resist deformation during the high-temperature steel pour.
3. Spectrometer-Verified Pouring
Molten carbon steel is rigorously analyzed via spectrometry before pouring to ensure exact chemical composition matches ASTM A27 or A216 standards.
4. Critical Heat Treatment
All carbon steel castings undergo in-house Normalizing and Tempering to relieve internal stresses, refine the grain structure, and enhance machinability.
5. CNC Machining & NDT
Finished castings are shot-blasted, machined on our 5-axis CNC centers, and subjected to rigorous NDT (Non-Destructive Testing) like MPI or UT.
Carbon Steel Sand Casting Applications
We supply fully machined carbon steel sand castings to heavy industries across the USA and Canada.
High-Pressure Valve Bodies
Manufactured using ASTM A216 WCB. Our sand casting process allows for complex internal coring, ensuring leak-free performance in oil & gas pipelines.
Construction Equipment Brackets
Using ASTM A27 Grade 70-36, we cast highly durable load-bearing brackets and suspension components that withstand immense structural stress and impact.
Industrial Gear Blanks
We supply robust carbon steel sand cast gear blanks. Post-casting heat treatment ensures excellent machinability for the final gear cutting.
Why Choose Us for Your Carbon Steel Castings?
We operate a fully integrated facility. By keeping pattern making, pouring, heat treatment, and CNC machining under one roof, we eliminate supply chain delays and take full responsibility for the final tolerances of your custom parts.
- Direct Factory Pricing – No Middlemen
- ISPM-15 Export Packaging for Rust-Free Ocean Transit
- Comprehensive Material Test Reports (MTRs) Provided
- Seamless DDP/FOB Logistics to North America
Carbon Steel Casting FAQs
Sand casting is far more cost-effective for medium to large-sized heavy industrial parts. While investment casting offers tighter tolerances for tiny components, our automated resin sand casting lines can achieve excellent precision for parts weighing from 50 lbs up to several tons, with significantly lower tooling costs.
At Kurt Foundry, our capabilities allow us to pour custom carbon steel castings ranging from 50 lbs up to 5,000 lbs (2.5 tons) per single piece. We utilize both automated molding lines for higher volumes and floor molding for oversized structural components.
Carbon steel has a higher volumetric shrinkage rate than iron. Our foundry engineering team uses advanced 3D casting simulation software to design highly optimized gating and riser systems. Combined with strategic placement of chills in the resin sand molds, we ensure directional solidification that prevents internal shrinkage cavities and porosity.
Absolutely. For critical applications like pressure valves and load-bearing brackets, we offer comprehensive in-house NDT services. This includes Magnetic Particle Inspection (MPI) for surface defects and Ultrasonic Testing (UT) to guarantee the internal structural integrity of the casting before it leaves our facility.
Both are covered under ASTM A216 for high-temperature and pressure-containing parts. WCC has a slightly higher manganese and carbon limit, which yields higher tensile and yield strength compared to WCB. WCB is more common for standard industrial valves.
Yes, Kurt Foundry provides fully integrated manufacturing. We cast the carbon steel parts and utilize our in-house 5-axis CNC machining centers to drill, mill, bore, and turn the castings so they are ready for immediate assembly upon delivery to your facility.
Ready to Quote Your Steel Casting Project?
Send us your 2D/3D CAD drawings. Our foundry engineers will provide a comprehensive DFM review and a competitive B2B quote within 48 hours.
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