Material Comparison
Compare verified engineering materials side by side with condition-specific mechanical properties.
| Parameter | EN-GJL-150 Gray Cast Iron | ASTM A48 Class 20 Gray Cast Iron |
|---|---|---|
| Material Family | Cast Iron | Cast Iron |
| Subfamily | Gray Cast Iron | Gray Cast Iron |
| EN Designation | EN-GJL-150 | — |
| W-Nr Designation | EN-JL1020 | — |
| DIN Designation | GG-15 | — |
| ISO Designation | 185/JL/150 | — |
| ASTM Designation | — | A48 Class 20 |
| UNS Designation | — | F11401 |
| SAE Designation | — | J431 G2000 |
| Element | EN-GJL-150 Gray Cast Iron | ASTM A48 Class 20 Gray Cast Iron |
|---|---|---|
| C (Carbon) | 3.4 – 3.8% | 3.4 – 3.8% |
| Si (Silicon) | 2.3 – 2.8% | 2.3 – 2.8% |
| Mn (Manganese) | 0.5 – 0.8% | 0.5 – 0.8% |
| P (Phosphorus) | ≤ 0.2% | ≤ 0.2% |
| S (Sulfur) | ≤ 0.15% | ≤ 0.15% |
| Fe (Iron) | — | — |
| Property | EN-GJL-150 Gray Cast Iron | ASTM A48 Class 20 Gray Cast Iron |
|---|---|---|
| Density · TYPICALUnit: g/cm³ | 7.1 g/cm³ | 7.1 g/cm³ |
| Mechanical Parameter | EN-GJL-150 Gray Cast IronAs-Cast (Wall thickness 15 mm to 30 mm) | ASTM A48 Class 20 Gray Cast IronAs-Cast (Standard Test Bar B, 30.5 mm / 1.2 in. diameter) |
|---|---|---|
| Poisson Ratio · TYPICALUnit: dimensionless | 0.26 dimensionless | 0.26 dimensionless |
| Property | EN-GJL-150 Gray Cast Iron | ASTM A48 Class 20 Gray Cast Iron |
|---|---|---|
| Electrical Resistivity · TYPICALCategory: ELECTRICAL • Unit: nΩ·m | 740 nΩ·m | — nΩ·m |
| Electrical Resistivity · TYPICAL · 20 °CCategory: ELECTRICAL • Unit: nΩ·m | — nΩ·m | 750 nΩ·m |
| Thermal Conductivity · TYPICALCategory: THERMAL • Unit: W/(m·K) | 52 W/(m·K) | — W/(m·K) |
| Thermal Conductivity · TYPICAL · 20 °CCategory: THERMAL • Unit: W/(m·K) | — W/(m·K) | 53 W/(m·K) |
| Specific Heat Capacity · TYPICALCategory: THERMAL • Unit: J/(kg·K) | 460 J/(kg·K) | — J/(kg·K) |
| Specific Heat Capacity · TYPICAL · 20 °CCategory: THERMAL • Unit: J/(kg·K) | — J/(kg·K) | 460 J/(kg·K) |
| Coefficient of Thermal Expansion · TYPICALCategory: THERMAL • Unit: µm/(m·K) | 11.5 µm/(m·K) | 11.5 µm/(m·K) |
Machinability: Exceptional machinability (~110% of free-cutting brass baseline). Ferritic matrix and coarse graphite flakes ensure rapid chip breaking and minimal cutting force.
Weldability: Poor weldability. Generally limited to non-structural cosmetic repair with high-nickel filler wire and 250°C preheat.
Formability / Cold Working: Non-deformable.
Heat Treatment & Annealing: Stress relief annealing at 520°C–560°C.
Machinability: Outstanding machinability rating (~110% relative to C36000 free-cutting brass baseline). The coarse graphite flakes disrupt the ferritic matrix, acting as continuous internal chip breakers and providing innate solid lubrication to cutting edges with negligible tool wear.
Weldability: Poor weldability. Welding is generally restricted to non-structural repair casting salvaging. Requires minimum 250°C to 300°C preheating, high-nickel filler rods (AWS ENi-CI), light peening to mitigate shrinkage stress, and slow furnace cooling to avoid brittle white iron and martensitic heat-affected zones (HAZ).
Formability / Cold Working: Non-deformable. Cast iron lacks plastic ductility and cannot be cold or hot rolled, bent, forged, or stamped. All geometric shaping must occur in the mold cavity or through machining.
Heat Treatment & Annealing: Stress relief annealing at 540°C to 565°C (1000°F to 1050°F) for 1 hour per 25 mm of thickness relieves residual foundry stresses without softening. Graphitization annealing at 760°C converts residual pearlite to ferrite for maximum machinability.