Innovations to Enhance Rail Performance - Unife
Innovations to Enhance Rail Performance - Unife
Innovations to Enhance Rail Performance - Unife
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Past & Present <strong>Rail</strong> Microstructures<br />
1767 Cast Iron ~ 3%C; 200HB<br />
1808 Wrought Iron 0.05%C; 174HB<br />
1857 Bessemer Steel ~ 0.25%C; 182HB<br />
100µm<br />
1950 BS11 Normal (R220);<br />
~0.55%C, 230HB<br />
1970 Grade A (R260) 1985 MHT (R350HT)<br />
280HB<br />
350HB<br />
Steel ~ 0.8%C<br />
Current HE Grades (R400HT)<br />
>400HB Steel ~ 0.9%C<br />
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