Editorial Technical Reference

Ductile Iron Casting

This page explains how Ductile Iron Casting is classified within Basic Metal Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Ductile iron casting is a cast iron product with spheroidal graphite, offering high strength, ductility, and wear resistance for demanding industrial applications.

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Product Specifications

Technical details and manufacturing context for Ductile Iron Casting

Definition

Ductile iron casting, also known as spheroidal graphite iron (SGI) or nodular iron, is used in automotive components, pipe fittings, pumps, valves, and heavy machinery where strength and toughness are critical. It is specified by material grade (e.g., EN-GJS-400-15) and casting dimensions, with grades distinguished by tensile strength, yield strength, and elongation. The spheroidal graphite structure imparts ductility, making it a cost-effective alternative to steel castings.

Working Principle

During solidification, magnesium or cerium is added to molten iron to cause graphite to precipitate as spheres instead of flakes. These spheres act as crack arresters, enhancing ductility and toughness. The resulting microstructure provides a combination of high strength and good machinability.

Common Materials

EN-GJS-400-15, EN-GJS-500-7, EN-GJS-600-3, ASTM A536 60-40-18, ASTM A536 80-55-06, GB/T 1348 QT400-18, GB/T 1348 QT500-7

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tensile Strength	400–900 MPa	Depends on gradeISO 1083
Yield Strength	250–600 MPa	Depends on gradeISO 1083
Elongation	2–18 %	Higher for ferritic gradesISO 1083
Brinell Hardness	130–320 HB	Varies with grade and heat treatmentISO 1083
Impact Toughness (at -20°C)	10–14 J	For ferritic gradesISO 1083
Casting Weight Range	0.5–5000 kg	Typical range for sand casting
Wall Thickness Range	5–200 mm	Depends on casting design
Dimensional Tolerance	CT8–CT10 grade	Typical for sand castingISO 8062
Surface Roughness	Ra 6.3–25 μm	As-cast condition
Maximum Service Temperature	350–400 °C	For continuous service
Minimum Service Temperature	-40 to -20 °C	For ferritic grades
Machinability Index	70–90 %	Relative to steel (100%)
Fatigue Strength (Rotating Bending)	200–350 MPa	At 10^7 cycles
Damping Capacity	5–10 times	Relative to steel
Corrosion Resistance	Moderate	Requires coating for harsh environments
Non-Destructive Testing	UT/MT/RT method	Per customer requirementISO 1083

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ductile Iron Casting.

Published Manufacturer Relationships

Source-reviewed profile relationships currently associated with Ductile Iron Casting

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Data Basis

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Preliminary Technical Classification

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