Ningbo Hansheng Machinery Parts Co., Ltd. (Ningbo Yifei Machinery Parts Co., Ltd.) is a specialized Sand Casting Parts manufacturer serving global B2B buyers since 2003. Our 5,000 m² factory in Ningbo, Zhejiang Province, produces custom sand castings in grey iron, ductile iron, carbon steel, alloy steel, stainless steel, aluminum, brass, and copper. We supply components for automotive, mining, engineering machinery, oil and gas, marine hardware, pump and valve, and heavy equipment applications. Our quality system conforms to ISO 9001:2000, and we export primarily to the United States, United Kingdom, Germany, France, Spain, and other European markets.
Our Sand Casting Range and Process Capabilities
We offer multiple sand casting processes to match part geometry, production volume, and material requirements. Our foundry supports both small-batch prototypes and high-volume production runs.
| Process |
Materials |
Typical Applications |
Key Characteristics |
| Green Sand Casting |
Grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum, brass, bronze |
Engine blocks, pump housings, valve bodies, machine bases, gears |
Cost-effective for medium to high volumes; good surface finish |
| Furan Resin Sand Casting |
Grey iron, ductile iron, carbon steel, alloy steel, stainless steel |
Large valve bodies, pump impellers, construction machinery parts |
Higher dimensional accuracy; good collapsibility |
| Cold Harden Resin Sand Casting |
Same as furan resin; also suitable for high-alloy steels |
Heavy machinery frames, mining equipment components |
Excellent strength and dimensional stability |
| Sodium Silicate (Water Glass) Sand Casting |
Carbon steel, stainless steel, alloy steel, bronze, brass, aluminum |
Marine hardware, pipe fittings, flanges |
Good surface finish; suitable for complex cores |
Materials and Critical Specifications
We cast a wide range of ferrous and non-ferrous alloys. Our material selection is based on the working point, mechanical load, corrosion environment, and production target.
- Grey Iron (e.g., GG20, GG25): Good wear resistance, damping capacity, and machinability. Used for machine tool bases, gear housings, and pump bodies.
- Ductile Iron (e.g., GGG40, GGG50, GGG70): Higher strength and elongation than grey iron. Suitable for high-load components such as wheel hubs, bogies, and valve bodies.
- Carbon Steel (e.g., WCB, WCC, LCC): Good weldability and toughness. Used for flanges, fittings, and structural parts.
- Alloy Steel (e.g., 4140, 4340): Higher strength, wear resistance, and hardenability. Applied in mining and heavy equipment.
- Stainless Steel (e.g., 304, 316, CF8M): Excellent corrosion resistance. Used in chemical, food processing, and marine applications.
- High Chrome Cast Iron: Superior abrasion resistance. Used for mill liners, slurry pump parts, and mining wear components.
- Non-Ferrous (Aluminum, Brass, Bronze, Copper): Lightweight or corrosion-resistant parts for electrical, plumbing, and decorative hardware.
Accuracy, Tolerances, and Quality Control
Our sand castings are produced to standard commercial tolerances (typically CT9–CT12 for iron and steel, CT7–CT9 for non-ferrous). We perform 100% dimensional inspection using CMM, profile projectors, and digital calipers. Material verification is conducted via chemical analysis and mechanical testing. Our quality system follows ISO 9001:2000, with full traceability from raw material to finished part.
Surface Treatment and Secondary Operations
We offer a full range of post-casting services to meet your final part requirements:
- Machining: CNC turning, milling, drilling, boring, and grinding to achieve tight tolerances.
- Heat Treatment: Normalizing, annealing, quenching, and tempering to optimize mechanical properties.
- Surface Finishing: Polishing, powder coating, painting, galvanizing, chrome plating, anodizing, and ENP.
- Assembly and Testing: Pressure testing, leak testing, and functional assembly as required.
Controls and Automation Integration
We configure our production line around the required interface with your existing systems. For high-volume projects, we can integrate automated molding lines, robotic pouring, and in-line inspection stations. Our engineering team works with your specifications to define gating, risering, and core design for optimal yield and quality.
Installation, Acceptance, and Maintenance
We provide dimensional inspection reports and material certificates with each shipment. For large or complex assemblies, we can arrange third-party inspection (SGS, BV, or TÜV) at the buyer's request. Our after-sales support includes technical documentation, spare parts recommendations, and ongoing engineering consultation.
Information We Use to Configure Your Solution
To prepare an accurate quotation and production plan, we require the following project information:
- Part drawing (PDF, AutoCAD, SolidWorks, or ProE) with dimensions, tolerances, and surface finish requirements.
- Material specification (grade, hardness, corrosion resistance, or mechanical properties).
- Annual or batch quantity to determine the most cost-effective process.
- Any required post-casting operations (machining, heat treatment, surface coating).
- Target delivery schedule and packaging requirements.
- Applicable industry standards (ASTM, DIN, ISO, or customer-specific).
Frequently Asked Questions
What is the typical lead time for sand castings?
Lead time depends on part complexity, material, and quantity. For standard parts with existing patterns, we typically ship within 4–6 weeks. For new tooling, add 2–4 weeks for pattern making. We confirm the schedule at quotation.
Do you provide pattern making or can I supply my own patterns?
We can design and manufacture patterns based on your drawing, or we can use customer-supplied patterns. We use wood, resin, and metal patterns depending on production volume and required accuracy.
What is the minimum order quantity (MOQ) for sand castings?
We accept small batches starting from 50 pieces for simple parts. For complex or large castings, MOQ may be lower. We also support prototype runs for new product development.
Can you supply machined and finished parts ready for assembly?
Yes. We offer complete machining, heat treatment, and surface finishing in-house or through our qualified partner network. We deliver parts that are ready for final assembly.
How do you ensure quality for export shipments?
We follow ISO 9001:2000 procedures with in-process inspection, final dimensional check, and material certification. We can also arrange third-party inspection before shipment. Our export packaging is designed for ocean freight to prevent damage.
What industries do you serve with sand castings?
We serve automotive, mining, construction, oil and gas, marine, pump and valve, agricultural machinery, railway, and general engineering sectors. Our castings are used in engine parts, transmission housings, pump bodies, valve bodies, flanges, gears, and heavy equipment frames.