Grade Designations.
| BS EN 1563:2018 | EN-GJS-500-7 / EN-JS1050 |
| BS 2789:1985 (withdrawn) | 500/7 (SNG 500/7) |
| ASTM A536 | 70-50-05 |
| DIN (former) | GGG-50 / 0.7050 |
| JIS | FCD500 |
Availability & Supply Condition.
Continuously cast rounds: 25–400mm diameter. Cut lengths available from stock.
Supply condition: Continuously cast and supplied as-cast, turned or centreless ground. Ferritic-pearlitic matrix giving balanced strength and ductility.
Cut to length from 1 piece — −0/+2mm standard tolerance — 2–3 day turnaround — Cutting service details ›
Chemical Analysis.
Typical values shown as percentages by weight (% wt). Values are ranges unless stated as maxima.
| Element | Typical Range (%) | Notes |
|---|---|---|
| Carbon (total) | 3.40–3.80 | Spheroidal graphite nodules |
| Silicon (Si) | 2.10–2.80 | Ferritic-pearlitic matrix |
| Manganese (Mn) | 0.20–0.50 | Promotes pearlite |
| Phosphorus (P) | 0.05 max | |
| Magnesium (Mg) | 0.03–0.06 | Nodularising agent (residual) |
For full chemical analysis with cast number, request an EN 10204 3.1 material test certificate when ordering. Certificate types explained ›
Mechanical Properties.
Indicative values to BS EN 1563. Properties vary by section size and matrix condition.
| Designation | Tensile Strength (N/mm²) | 0.2% Proof Stress (N/mm²) | Elongation A (%) | Hardness (HB) |
|---|---|---|---|---|
| EN-GJS-500C / EN-JS1050 | ≥500 (min) | ≥320 | ≥7 | 170–230 |
Hardness values: see our hardness conversion table to convert between HRC, HB, HV and tensile strength.
Typical Applications.
- Gears, sprockets and pinions
- Crankshafts and camshafts
- Hydraulic components and cylinders
- Pump and compressor bodies
- Rollers, sheaves and pulleys
- Machine tool and press components
Key Benefits.
- Balanced strength and ductility for general use
- Higher tensile and proof strength than GJS-400
- Good machinability and surface finish
- Strong, vibration-damping matrix
- Cost-effective alternative to cast steel
Remarks & Guidance.
EN-GJS-500C is the most widely specified ductile grade, with a mixed ferritic-pearlitic matrix giving a good balance of strength, ductility and machinability. Suitable for the majority of loaded machined ductile-iron parts. Weldable with nickel electrodes and pre-heat where essential. Properties vary with section size and as-cast matrix.
