GJS-600-3 Casting & Sand Casting Process
Leesh Holdings is an experienced GJS-600-3 Casting manufacturer, supplying EN 1563 pearlitic ductile iron sand castings for gears, crankshafts, heavy machinery and high-strength structural components — custom drawings accepted, from prototype to volume production.
What Is GJS-600-3 Casting?
GJS-600-3 Casting is a pearlitic ductile iron grade defined in EN 1563, combining high tensile strength (≥ 600 MPa) with moderate ductility (≥ 3% elongation). It is the European counterpart to GGG60 (DIN 1693), QT600-3 (GB/T 1348) and ASTM A536 80-55-06 — chosen where wear resistance, rigidity and load-bearing capacity take priority over elongation.
High Strength
Minimum 600 MPa tensile strength with a pearlitic matrix — built for heavy static and dynamic loads.
Wear Resistance
Pearlitic structure provides good abrasion resistance for gears, slides and contact surfaces.
Sand Casting Advantage
Lower tooling cost vs. investment casting; handles parts up to 5 tons with complex cores.
Full Traceability
Heat-lot traceability, spectro analysis and mechanical test reports supplied with every batch.
Chemical Composition (Typical)
Typical ladle analysis for EN-GJS-600-3. EN 1563 specifies mechanical properties; composition is foundry-controlled to achieve the pearlitic matrix.
| Element | Typical Range (%) | Element | Typical Range (%) |
|---|---|---|---|
| Carbon (C) | 3.50 – 3.90 | Magnesium (Mg) | 0.03 – 0.06 |
| Silicon (Si) | 2.00 – 2.80 | Phosphorus (P) | ≤ 0.05 |
| Manganese (Mn) | 0.20 – 0.60 | Sulfur (S) | ≤ 0.02 |
| Copper (Cu, optional) | 0 – 0.50 | Tin (Sn, optional) | 0 – 0.08 |
International equivalents: EN-GJS-600-3 ≡ GGG60 (DIN 1693) ≡ QT600-3 (GB/T 1348) ≡ 80-55-06 (ASTM A536) ≡ FCD 600 (JIS G5502).
Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Rm) | ≥ 600 | MPa |
| Yield Strength (Rp 0.2%) | ≥ 370 | MPa |
| Elongation (A) | ≥ 3 | % |
| Brinell Hardness (typical) | 190 – 270 | HBW |
| Density | ≈ 7.10 – 7.20 | g/cm³ |
| Matrix Microstructure | Pearlitic | — |
Test certificates (chemical & mechanical) per EN 10204 3.1 supplied with every shipment.
GJS-600-3 vs Other Ductile Iron Grades
Choosing the right grade depends on your application priorities — strength, wear resistance, or ductility.
| EN 1563 Grade | Tensile (MPa) | Elongation | Typical Matrix | Best For |
|---|---|---|---|---|
| EN-GJS-400-15 | ≥ 400 | ≥ 15% | Ferritic | Impact & machinability |
| EN-GJS-500-7 | ≥ 500 | ≥ 7% | Ferrite + Pearlite | Balanced strength & ductility |
| EN-GJS-600-3 | ≥ 600 | ≥ 3% | Pearlitic | High strength & wear resistance |
| EN-GJS-700-2 | ≥ 700 | ≥ 2% | Pearlitic (HT) | Maximum strength, gears & crankshafts |
Not sure which grade fits your part? Send us your drawing — our engineers will recommend within 24 hours.
Our Sand Casting Process
A complete in-house green sand and resin sand casting chain — from tooling to finished, inspected parts weighing up to 5,000 kg each.
Pattern Making
Wood, aluminum or resin patterns built to your drawing, with shrinkage allowance and draft angles.
Molding & Cores
Green sand or resin sand molds with precision cores for internal cavities and complex geometries.
Melting & Nodulizing
Induction furnace melting with Mg-treatment for GJS-600-3 Casting spheroidization and late inoculation.
Pouring & Cooling
Controlled pouring temperature and cooling rate to develop a uniform pearlitic matrix in the casting.
Shakeout & Fettling
Mold removal, runner and riser cut-off, gate grinding and surface shot blasting.
Heat Treatment
Normalizing or pearlitizing treatment when required to stabilize hardness and microstructure.
Machining
CNC turning, milling, boring and drilling to final drawing tolerances with CMM verification.
Inspection & Delivery
Dimensional check, ultrasonic testing, hardness testing, mechanical test coupons and EN 10204 3.1 certificates.
Foundry Inside
A look inside Leesh Holdings — complete sand casting facilities from pattern storage to final inspection, all under one roof.
Sand Molding Workshop
Core Making Station
Melting & Nodulizing
CNC Machining & InspectionTypical Applications
Strong, wear-resistant sand castings for high-load and high-stress industrial environments.
Quality & Capabilities
- Spectrometer chemical analysis per heat (C, Si, Mn, P, S, Mg, Cu verified)
- Universal tensile testing — mechanical test coupons from each ladle or heat
- Brinell / Rockwell hardness testing
- Ultrasonic flaw detection (UT) on thick sections
- Metallographic analysis — nodularity rating, pearlite/ferrite ratio, graphite classification
- Hydrostatic & air pressure testing for pressure-retaining parts
- Full CMM dimensional inspection reports
- EN 10204 3.1 material certificates with every shipment
Need GJS-600-3 Casting?
Send us your drawing or sample — get a custom sand casting quotation with EN 10204 3.1 material certification within 24 hours.
david.lee@leesh.cn
