Melted iron
Melted iron in continuous casting
GG-25 pearlitic: pearlitic-ferritic cast sheet DIN 1691 GG-25
Quality of medium hardness (180-220 HB) desirable for applications where a balance is needed between the mechanical characteristics and ease of machining.
Nodular GGG-50: pearlitic-ferritic nodular cast iron DIN 1693 GGG-50/7
With pearlitic-ferritic structure, has a higher wear resistance and a higher hardness (180-230 HB) to other qualities. Is recommended for applications where good machinability and surface finish are required in addition to that there is friction with other parts and / or materials.
Chemical compositions and mechanical properties and physical
| GG-25 | ||
| FEATURES | ||
| Shear | N / mm 2 | 200-300 |
| Torsion Resistance | N / mm 2 | 200-300 |
| Coefficient Poison | 0.26 | |
| Compressive strength | N / mm 2 | 700-850 |
| Modulus of elasticity E | GN / mm 2 | |
| ** Modulus of elasticity E | KN / mm 2 | 100-120 |
| *** Limit conventional elasticity to 0.1% | N / mm 2 | 160-220 |
| Elongation | % | 0.2 / 0.8 |
| Flexural | N / mm 2 | 330 |
| Unnotched fatigue limit (ø10, 6) | ||
| Unnotched fatigue ratio | Limit / UTS | |
| Notched fatigue limit (ø10, 6) | N / mm 2 | |
| Thermal conductivity 300 ° | W / (K °. m) | 45 |
| Heat Capacity 20 ° to 500 ° C | J / kg.K °) | 460-535 |
| Linear expansion coefficient 20 °-400AC | μ.m / (mK) | 11.7-13 |
| Density | g / cm 3 | 7.2 |
| Hysteresis loss (B = 1T) | J / m 3 | 2500-3000 |
| Resistivity | μΩ.m | from 0.7 to 0.75 |
| Permeability | uH / m | 220-330 |
| Composition indicative | |
| Carbon | 2.9 to 3.65 |
| Silicon | 1.8 to 2.9 |
| Manganese | 0.5 to 0.7 |
| Sulfur | 0.1 max. |
| Phosphorus | 0.3 max. |
| DIAMETER | HARDNESS HB. Min-Max. |
| 40-75 mm | 180-220 |
| 75-150 mm | 170-220 |
| Superior 150 mm | 160-220 |
| GGG-50 | ||
| FEATURES | ||
| Shear | N / mm 2 | 400-500 |
| Torsion Resistance | N / mm 2 | 400-500 |
| Coefficient Poison | 0.275 | |
| Compressive strength | N / mm 2 | 800 |
| Modulus of elasticity E | GN / mm 2 | 169 |
| ** Modulus of elasticity E | KN / mm 2 | |
| *** Limit conventional elasticity to 0.1% | N / mm 2 | |
| Elongation | % | 3-10 |
| Flexural | N / mm 2 | |
| Unnotched fatigue limit (ø10, 6) | 200-220 | |
| Unnotched fatigue ratio | Limit / UTS | 0.45 |
| Notched fatigue limit (ø10, 6) | N / mm 2 | 120-140 |
| Thermal conductivity 300 ° | W / (K °. m) | 35.2 |
| Heat Capacity 20 ° to 500 ° C | J / kg.K °) | 515 |
| Linear expansion coefficient 20 °-400AC | μ.m / (mK) | 12.5 |
| Density | g / cm 3 | 7.2 |
| Hysteresis loss (B = 1T) | J / m 3 | 1000-2000 |
| Resistivity | μΩ.m | 0.51 |
| Permeability | uH / m | 1596 |
| Composition indicative | |
| Carbon | 3.4 to 3.85 |
| Silicon | 2.3 to 3.1 |
| Manganese | from 0.1 to 0.3 |
| Sulfur | 0.020 max. |
| Phosphorus | 0.1 max. |
| DIAMETER | HARDNESS HB. Min-Max. |
| 40-75 mm | 180-230 |
| 75-150 mm | 170-230 |
| Superior 150 mm | 170-230 |