GJS-400-15 Casting & Sand Casting Process
Leesh Holdings is an experienced GJS-400-15 Casting manufacturer, supplying EN 1563 ferritic ductile iron sand castings for turbine housings, pump bodies, valve components and heavy machinery — custom drawings accepted, from prototype to volume production.
What Is GJS-400-15 Casting?
GJS-400-15 Casting is a fully ferritic ductile iron grade defined in EN 1563, known for 15% minimum elongation and superior impact toughness at low temperatures. It is the European counterpart to GGG40 (DIN 1693), QT400-15 (GB/T 1348) and ASTM A536 60-40-18 — designed where shock absorption, machinability and reliability matter more than extreme tensile strength.
High Elongation
Minimum 15% elongation guarantees ductility and crack resistance under impact — critical for safety components.
Fully Ferritic Matrix
No pearlite means excellent machinability and consistent mechanical properties across thick sections.
Sand Casting Advantage
Lower tooling cost vs. investment casting; handles parts up to 5 tons with complex internal cavities via 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-400-15. EN 1563 specifies mechanical properties; composition is foundry-controlled to meet those requirements.
| Element | Typical Range (%) | Element | Typical Range (%) |
|---|---|---|---|
| Carbon (C) | 3.50 – 3.90 | Magnesium (Mg) | 0.03 – 0.06 |
| Silicon (Si) | 2.20 – 2.80 | Phosphorus (P) | ≤ 0.05 |
| Manganese (Mn) | ≤ 0.30 | Sulfur (S) | ≤ 0.02 |
International equivalents: EN-GJS-400-15 ≡ GGG40 (DIN 1693) ≡ QT400-15 (GB/T 1348) ≡ 60-40-18 (ASTM A536) ≡ FCD 400 (JIS G5502) ≡ GS 400-15 (ISO 1083).
Mechanical Properties
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Rm) | ≥ 400 | MPa |
| Yield Strength (Rp 0.2%) | ≥ 250 | MPa |
| Elongation (A) | ≥ 15 | % |
| Brinell Hardness (typical) | 135 – 180 | HBW |
| Impact Toughness (23°C) | ≥ 14 (typical) | J/cm² |
| Density | ≈ 7.10 – 7.20 | g/cm³ |
| Matrix Microstructure | Predominantly ferritic | — |
Test certificates (chemical & mechanical) per EN 10204 3.1 supplied with every shipment.
GJS-400-15 vs Other Ductile Iron Grades
Choosing the right grade depends on your application priorities — elongation, machinability, or strength.
| EN 1563 Grade | Tensile (MPa) | Elongation | Typical Matrix | Best For |
|---|---|---|---|---|
| EN-GJS-400-15 | ≥ 400 | ≥ 15% | Ferritic | Shock & impact, thick sections, machining |
| EN-GJS-500-7 | ≥ 500 | ≥ 7% | Ferrite + Pearlite | General engineering, 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-400-15 Casting spheroidization and late inoculation.
Pouring & Cooling
Controlled pouring temperature and cooling rate to achieve a fully ferritic matrix across thick sections.
Shakeout & Fettling
Mold removal, runner and riser cut-off, gate grinding and surface shot blasting.
Heat Treatment
Ferritizing annealing when required, ensuring uniform microstructure and maximum ductility.
Machining
CNC turning, milling, boring and drilling to final drawing tolerances with CMM verification.
Inspection & Delivery
Dimensional check, ultrasonic 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
Ductile, impact-resistant sand castings for demanding industrial and agricultural environments.
Quality & Capabilities
- Spectrometer chemical analysis per heat (C, Si, Mn, P, S, Mg, Cr, 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, ferrite/pearlite 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-400-15 Casting?
Send us your drawing or sample — get a custom sand casting quotation with EN 10204 3.1 material certification within 24 hours.
info@leesh.cn
