For every 100 ton of 355 MPa steel produced, the additions can be:
For these types of structural flat steel products, Morosov et al demonstrated that there is a strong correlation between niobium and manganese content with respect to yield strength and tensile strength. As you can see from the following figures, varying the relative amounts of niobium and manganese enables the requirements for a specific yield strength and tensile strength to be met.
From this example, at a production level of 300,000 tons per year, you can see a saving of 28% on alloying costs, representing an actual saving of 2,036,807 USD per year.
Finally, the niobium-based lean alloy design can also be applied to higher performing steels, those with greater yield strength than 355 MPa. We can use our rolling mill simulator ‘MicroSim’, to provide you with the optimum rolling mill process to meet your specifications for these higher performance steels.