There seems to be some duplication in the given titles. However, based on the given text, here are some possible corresponding sections:
Chemical Composition: This section would discuss the elements and their respective percentages present in the C1540-15 steel grade, explaining how these contribute to the material’s strength and other properties.
Mechanical Properties: This section would provide an overview of the mechanical properties exhibited by the C1540-15 steel grade, such as its strength, hardness, toughness, and ductility. It may also discuss its resistance to deformation, fatigue, and corrosion.
Standard Number: This section would provide information on the relevant standard(s) that specify the requirements and testing methods for C1540-15 steel grade. It may mention the standard number and any applicable industry or international standards.
Corresponding: This term is unclear in the context provided. It is possible that it refers to a section comparing the unmatched strength of the C1540-15 steel grade to other steel grades or materials. However, without further information, it is difficult to determine the exact content of this section.