The rail cast iron shoulder is a semi-embedded part into the sleeper to fasten the clip with the base plate, and protect the clip from being stolen. Railteco could supply different types of shoulders satisfying clients' needs.
The material properties of cast iron shoulder:
| Material | Material Chemical Composition〔%〕 | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation (%) | ||||
| C | Si | Mn | P | S | ||||
| QT400-15(GGG40) | 3.6-.36 | 3.0-3.2 | 0.5 | 0.07 | 0.02 | 400 | 250 | 15 |
| QT450-10(GGG45) | 3.4-3.9 | 3.7-3.0 | 0.5 | 0.07 | 0.03 | 450 | 310 | 10 |
| QT500-7 (GGG50) | 3.4-3.8 | 2.5-2.9 | 0.6 | 0.08 | 0.025 | 500 | 320 | 7 |
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