Custom CNC Machining Cast Iron Parts
Professional precision machining services for gray iron, ductile iron, and white iron components. Trusted by global manufacturers for over 15 years with ISO certified quality standards.

Cast Iron Material Types We Machine
We specialize in precision CNC machining of various cast iron alloys, each offering unique properties for specific applications and performance requirements.
Gray Cast Iron
Excellent machinability, vibration damping, and wear resistance. Ideal for engine blocks, machine bases, and pump housings.
- • Superior dampening properties
- • Excellent machinability
- • Cost-effective solution
- • Good wear resistance
Ductile Cast Iron
High strength, ductility, and impact resistance. Perfect for automotive components, valve bodies, and structural parts.
- • High tensile strength
- • Excellent ductility
- • Impact resistance
- • Fatigue resistance
White Cast Iron
Extremely hard and wear-resistant. Suitable for mill liners, crushing equipment, and high-wear applications.
- • Maximum hardness
- • Exceptional wear resistance
- • Abrasion resistance
- • High compressive strength
Cast Iron Grades Comparison Table
Comprehensive comparison of US standard cast iron grades with their properties, applications, and cost analysis to help you select the optimal material for your project.
Grade | Tensile Strength (MPa) | Applications | Cost Level |
---|---|---|---|
ASTM A48 Class 20 | 138 | Small castings, decorative items | Low |
ASTM A48 Class 30 | 207 | Engine blocks, pump housings | Low |
ASTM A536 60-40-18 | 414 | Automotive components, valves | Medium |
ASTM A536 80-55-06 | 552 | Crankshafts, heavy-duty gears | Medium |
ASTM A532 Class I | 690 | Mill liners, crushing equipment | High |
ASTM A532 Class III | 827 | Wear plates, mining equipment | High |

Material Selection Guide
- Class 20-30: General purpose applications with moderate strength requirements
- 60-40-18: Automotive and machinery components requiring ductility
- 80-55-06: High-strength structural and heavy-duty applications
- Class I-III: Extreme wear resistance for mining and industrial use
Advanced Cast Iron Machining Capabilities
State-of-the-art CNC equipment and experienced technicians ensure precise, efficient machining of all cast iron grades with superior surface finishes.
CNC Milling
3-axis to 5-axis CNC milling for complex geometries and tight tolerances
CNC Turning
Precision turning operations for cylindrical and rotational cast iron components
Surface Grinding
High-precision surface grinding for optimal flatness and surface finish
Drilling & Boring
Accurate hole drilling and boring operations with excellent concentricity
Technical Specifications
- Tolerance Capability: ±0.005mm
- Surface Roughness: Ra 0.8μm
- Max Part Size: 1500×1000×800mm
- Max Part Weight: 2000kg
- Production Capacity: 5000+ parts/month
Quality Assurance
- ISO 9001:2015 Certified
- CMM Dimensional Inspection
- Material Traceability
- First Article Inspection
- Statistical Process Control
Surface Treatments
- Powder Coating
- Painting & Priming
- Galvanizing
- Heat Treatment
- Shot Blasting
Cast Iron Applications Across Industries
Our precision-machined cast iron components serve diverse industries with critical applications requiring durability, reliability, and performance.
Automotive Industry
- • Engine blocks and cylinder heads
- • Brake rotors and drums
- • Transmission housings
- • Exhaust manifolds
- • Suspension components
Industrial Machinery
- • Machine tool bases
- • Pump housings and impellers
- • Valve bodies and fittings
- • Gearbox housings
- • Motor frames
Construction Equipment
- • Excavator counterweights
- • Crusher components
- • Concrete mixer parts
- • Heavy machinery frames
- • Hydraulic components
Energy & Power
- • Wind turbine components
- • Generator housings
- • Heat exchanger parts
- • Boiler components
- • Power transmission parts
Marine & Offshore
- • Propeller components
- • Engine components
- • Valve bodies
- • Anchor components
- • Deck fittings
Railway Transportation
- • Brake blocks and shoes
- • Wheel components
- • Coupling parts
- • Axle boxes
- • Bogie components

Frequently Asked Questions
Common questions about our custom CNC machining services for cast iron parts
What types of cast iron can you machine?
What tolerances can you achieve with cast iron machining?
What is the typical lead time for cast iron parts?
Do you provide surface treatments for cast iron parts?
What quality certifications do you have?
Can you handle both prototype and production quantities?
Get Your Custom Cast Iron Parts Quote
Ready to start your cast iron machining project? Contact our experienced team for a detailed quote and technical consultation.
Factory Address
Rongli Industrial Park, Dalang
Longhua District, Shenzhen, China
Email Contact
Response Time
Quick response within 8 hours
Detailed quote within 24 hours
15 Years Experience
Trusted by global manufacturers
ISO 9001:2015 certified quality