| Steel number n° 991 | |
| Catégory: | |
| Numerical EN 10027/AFNOR symbolic: Y 51 S7 | |
| Numeric EN 10027/AFNOR numerical: - | |
| AISI designation: | |
| Information: Old designation: | |
| Applications examples and others informations: | |
No informations about forming. |
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No informations about weldability. |
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No informations about corrosion resistance. |
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| See this steel Schaeffler Diagram | |
| Chemical composition element percentage | |
| Carbon entre 0.48 et 0.54 % | Others steels: Steel 1.2357 - 50 Cr Mo V 13-14 Steel 1.8159 - 50 CV 4 Steel 1.2721 - 50 Ni Cr 13 Steel 1.0903 - 50 S 7 Steel 1.2241 - 51 Cr V 4 |
| No Chromium | |
| No Nickel | |
| No Molybdenum | |
| Silicium entre 1.6 et 2 % | |
| Manganese entre 0.5 et 0.8 % | |
| No Vanadium | |
| No Tungsten | |
| Phosphorus:0.025% | |
| Sulfurus:0.025% | |
| Others elements: Cu 1.00-2.00 | |
| Note: Verify that there is no mistake in this document. |