Material Comparison
Compare verified engineering materials side by side with condition-specific mechanical properties.
| Parameter | EN-GJS-400-18 Ductile Cast Iron | ASTM A536 Grade 60-40-18 Ductile Cast Iron |
|---|---|---|
| Material Family | Cast Iron | Cast Iron |
| Subfamily | Ductile (Nodular) Iron | Ductile (Nodular) Iron |
| EN Designation | EN-GJS-400-18 | — |
| W-Nr Designation | EN-JS1020 | — |
| DIN Designation | GGG-40 | — |
| ISO Designation | 1083/JS/400-18 | — |
| ASTM Designation | — | A536 Grade 60-40-18 |
| UNS Designation | — | F32800 |
| SAE Designation | — | J434 D4018 |
| Element | EN-GJS-400-18 Ductile Cast Iron | ASTM A536 Grade 60-40-18 Ductile Cast Iron |
|---|---|---|
| C (Carbon) | 3.5 – 3.85% | 3.5 – 3.85% |
| Si (Silicon) | 2.2 – 2.7% | 2.2 – 2.8% |
| Mn (Manganese) | ≤ 0.3% | ≤ 0.35% |
| P (Phosphorus) | ≤ 0.05% | ≤ 0.05% |
| S (Sulfur) | ≤ 0.02% | ≤ 0.02% |
| Mg (Magnesium) | 0.035 – 0.06% | 0.035 – 0.06% |
| Fe (Iron) | — | — |
| Property | EN-GJS-400-18 Ductile Cast Iron | ASTM A536 Grade 60-40-18 Ductile Cast Iron |
|---|---|---|
| Density · TYPICALUnit: g/cm³ | 7.1 g/cm³ | 7.1 g/cm³ |
| Mechanical Parameter | EN-GJS-400-18 Ductile Cast IronFerritic (Annealed or As-Cast, wall thickness <= 30 mm) | ASTM A536 Grade 60-40-18 Ductile Cast IronTypical: As-Cast or Annealed (Ferritic Matrix, ASTM A536 Note 2) |
|---|---|---|
| Poisson Ratio · TYPICALUnit: dimensionless | 0.28 dimensionless | 0.28 dimensionless |
| Property | EN-GJS-400-18 Ductile Cast Iron | ASTM A536 Grade 60-40-18 Ductile Cast Iron |
|---|---|---|
| Electrical Resistivity · TYPICALCategory: ELECTRICAL • Unit: nΩ·m | 550 nΩ·m | 550 nΩ·m |
| Thermal Conductivity · TYPICALCategory: THERMAL • Unit: W/(m·K) | 36 W/(m·K) | 36 W/(m·K) |
| Specific Heat Capacity · TYPICALCategory: THERMAL • Unit: J/(kg·K) | 470 J/(kg·K) | 470 J/(kg·K) |
| Coefficient of Thermal Expansion · TYPICALCategory: THERMAL • Unit: µm/(m·K) | 12 µm/(m·K) | 11.8 µm/(m·K) |
Machinability: Very good machinability (~85% of C36000 baseline). Low cutting tool wear due to absence of pearlite.
Weldability: Weldable with qualified procedures. Preheating to 200°C and nickel-iron (ENiFe-1) filler metals required.
Formability / Cold Working: Limited localized cold forming possible due to 18% elongation.
Heat Treatment & Annealing: Ferritizing annealing at 880°C–920°C followed by slow furnace cool to 700°C.
Machinability: Very good machinability (~85% of C36000 baseline). Ferritic matrix provides low cutting forces, but ductile chips require chip breaker tool geometries.
Weldability: Moderately weldable compared to gray iron. Preheating to 200°C–260°C and nickel-iron (ENiFe-CI) electrodes are recommended, followed by full post-weld annealing (870°C–900°C) to restore maximum ductility in the heat-affected zone.
Formability / Cold Working: Limited cold coining and localized hydraulic swaging possible due to 18% tensile elongation. Bulk hot forging is not typical.
Heat Treatment & Annealing: Full ferritizing anneal: heat to 870°C–900°C (1600°F–1650°F) to dissolve carbides, furnace cool to 700°C (1300°F) and hold to convert pearlite to ferrite, then air cool.