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.

±0.005mm Tolerance

Fast 7-15 Days Delivery

3-Axis to 5-Axis CNC

ISO 9001 Certified

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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

CNC Machined Cast Iron Parts Manufacturing

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

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Frequently Asked Questions

Common questions about our custom CNC machining services for cast iron parts

What types of cast iron can you machine?

We specialize in machining all major types of cast iron including gray cast iron (ASTM A48), ductile cast iron (ASTM A536), white cast iron (ASTM A532), and malleable cast iron. Our experienced team can work with various grades from Class 20 to high-strength ductile iron grades.

What tolerances can you achieve with cast iron machining?

Our advanced CNC equipment can achieve tolerances as tight as ±0.005mm (±0.0002 inches) for critical dimensions. Standard tolerances are typically ±0.05mm (±0.002 inches) depending on the part geometry and material grade. We use CMM inspection to verify all critical dimensions.

What is the typical lead time for cast iron parts?

Lead times vary depending on part complexity and quantity. For machining existing castings, typical lead times are 7-15 days. For new parts requiring casting and machining, lead times are typically 3-4 weeks. Rush orders can be accommodated with expedited processing.

Do you provide surface treatments for cast iron parts?

Yes, we offer comprehensive surface treatment services including powder coating, painting, galvanizing, heat treatment, and shot blasting. Our integrated approach allows us to provide complete finished parts ready for installation, reducing your supply chain complexity.

What quality certifications do you have?

Rapidaccu is ISO 9001:2015 certified with comprehensive quality management systems. We maintain full material traceability, conduct first article inspections, and use statistical process control. Our quality team performs dimensional inspection using CMM equipment and provides detailed inspection reports.

Can you handle both prototype and production quantities?

Absolutely. We support everything from single prototype parts to high-volume production runs. Our flexible manufacturing setup allows us to efficiently handle orders from 1 piece to thousands of parts per month. We provide cost-effective solutions for all quantity levels.

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

info@rapidaccu.com

Response Time

Quick response within 8 hours
Detailed quote within 24 hours

15 Years Experience

Trusted by global manufacturers
ISO 9001:2015 certified quality