Micro-alloyed steels offer higher strength than general structural steels while at the same time weldability remains good. In some circumstances, it may be possible to use a smaller dimension of a micro-alloyed steel without compromising the strength of the structure, thereby reducing weight.

In common with low-carbon structural steels, micro-alloyed steels do not exhibit especially good machinability. For this reason, Tibnor has chosen to stock a programme of micro-alloyed steels in so-called M-execution. M-treatment confers greatly improved machinability without any significant negative influence on other properties.