Ductile Iron Castings
High Strength & Impact Resistant Iron Components
- ✅ High tensile strength – comparable to cast steel
- ✅ Excellent toughness – superior elongation & ductility
- ✅ Good impact resistance – ideal for dynamic loads
- ✅ Suitable for structural parts – replaces steel in many applications
Product Overview
What Are Ductile Iron Castings?
Ductile iron, also known as nodular cast iron or spheroidal graphite iron, features graphite in spherical nodules rather than flakes. This unique microstructure gives ductile iron exceptional strength, toughness, and ductility – properties that often allow it to directly replace cast steel at a lower cost and with better castability. At Matson Iron Casting, we produce high-quality ductile iron components for demanding applications including automotive suspension, heavy machinery, pipeline fittings, and structural parts. With precise metallurgical control and heat treatment capabilities, we deliver grades from QT400 to QT800 that meet international standards (ASTM A536, ISO 1083).
Key Advantages
- High strength comparable to steel – tensile strength up to 900 MPa
- Good ductility and elongation – up to 18% elongation in ferritic grades
- Suitable for heavy load applications – excellent fatigue resistance
Key Features
High Tensile Strength
Typical tensile strength ranges from 400 MPa to 900 MPa, comparable to low-carbon steel.
Excellent Toughness
Spheroidal graphite nodules prevent crack propagation, delivering superior impact strength.
Impact Resistance
Performs well under shock and dynamic loading; ideal for gears, brackets, and heavy equipment.
Heat Treatment Capability
Annealing, normalizing, and austempering (ADI) to achieve desired mechanical properties.
Specifications
| Parameter | Details / Range |
|---|---|
| Material Grades (ISO 1083 / ASTM A536) | QT400-15, QT500-7, QT600-3, QT700-2, QT800-2 (also 60-40-18, 65-45-12, 80-55-06) |
| Casting Process | Green sand casting, resin sand casting, shell molding, lost foam (custom) |
| Tensile Strength | 400 – 800 MPa (depends on grade) |
| Elongation | 2% – 18% (grade dependent) |
| Hardness (HB) | 150 – 300 HB (as-cast or heat treated) |
| Weight Range | 0.5 kg – 3,500 kg |
| Max Dimensions | Up to 2200 mm |
Applications
Automotive Components
Control arms, steering knuckles, differential cases, brake calipers, and wheel hubs – offering steel-like strength with castability.
Pipe Fittings
Flanges, couplings, elbows, tees for water, gas, and oil pipelines – high pressure resistance and excellent corrosion options.
Structural Parts
Heavy machinery frames, gearboxes, wind turbine hubs, agricultural equipment – delivering reliability under extreme loads.
Manufacturing Capability
Sand Casting Capability
High-volume automatic molding lines and manual molding for prototypes. Annual capacity over 5,000 tons.
CNC Machining Capability
4 & 5-axis machining centers, turning, milling, drilling – tolerances up to ±0.01 mm.
Heat Treatment Options
Annealing, normalizing, quenching & tempering, austempering (ADI) to enhance mechanical properties.
Custom Ductile Iron Parts
OEM & Custom Service
We specialize in made-to-order ductile iron castings. Whether you need a prototype or high-volume production, our engineering team assists with material selection, pattern design, and process optimization to reduce costs and lead times.
Supported File Formats
STEP, IGES, SolidWorks, AutoCAD (DWG/DXF), PDF, STL – just upload your 2D or 3D drawings, and we'll provide DFM feedback and a competitive quote within 24 hours.
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