micro-alloyed steel can be defined as a carbon-manganese steel
containing deliberately added alloying elements totalling only 0.05 to
0.10%. Alloying elements which are effective in modifying steel
properties when present in such small amounts include boron, vanadium
and niobium and boron in even lesser amounts (0.005% /0.003%).
Micro-alloyed steels are manufactured in Large tonnages for high
pressure pipelines in the petroleum industry and automotive forgings.
advantage of these steels is that in the case of forgings, careful
control of forge processing temperatures can eliminate subsequent heat
treatment. This is a major cost advantage particularly with certain
automotive components. Mechanical properties developed by controlled
hot working conditions are similar to those developed by conventional
hardening and tempering treatments for components where strength and
toughness are required