EN-GJS-400-18
5.3104Ferritic ductile cast iron with minimum tensile strength 400 MPa and minimum elongation 18%. Higher ductility than EN-GJS-400-15 due to more fully ferritic matrix and tighter process control. RT designation indicates room temperature impact testing. Used for pressure-retaining components, safety-critical castings, pipe fittings, and applications where impact resistance at room temperature is important.
Chemical composition comparison (wt%)
Side-by-side: EN-GJS-400-18 (EN) (typical foundry practice) vs ASTM
| Element | EN-GJS-400-18 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 3.3–3.8% | — | — |
| Si | 2.3–2.8% | — | — |
| Mn | 0.1–0.25% | — | — |
| P | ≤ 0.04% | — | — |
| S | ≤ 0.015% | — | — |
| Mg | 0.03–0.06% | — | — |
Mechanical properties
As Cast
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 400 | MPa |
| Yield Strength | ≥ 250 | MPa |
| Elongation | ≥ 18 | % |
| Density | ≥ 7.1 | g/cm3 |
| Elastic Modulus | ≥ 169 | GPa |
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EN-GJS-500-7
5.3200Ferritic-pearlitic ductile cast iron with minimum tensile strength 500 MPa and minimum elongation 7%. The balanced grade offering significantly higher strength than EN-GJS-400-15 while retaining reasonable ductility. Mixed ferrite-pearlite matrix (typically 40-50% pearlite). Used for crankshafts, connecting rods, suspension components, gear housings, heavy-duty pipe fittings, and medium-stress structural castings. Equivalent to DIN GGG50, JIS FCD500.
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