Iron alloy that is lighter and stronger than stainless steel

Iron alloy with specific gravity less than 7, 0.2% proof stress more than 1000 MPa, and tensile stress more than 1000 MPa

Overview

　Although stainless steel is an industrially important iron alloy, its specific strength is inferior to that of other metals because of its large specific gravity. An iron alloy having low specific gravity and high strength is required for the transport equipment.　
　The present invention provides high strength iron alloy having the maximum 0.2% proof stress and the tensile stress more than 1000 MPa while having the specific gravity less than 7.

Features・Outstandings

Effect & Application

　Table 1 shows mechanical properties of various examples, and Figure 1 shows stress-strain curves. All the examples have high strength, which is　
・0.2% proof stress more than 500 MPa
・tensile stress more than 800 MPa
Application to the transport equipment and the structural materials is expected.

IP Data

IP No.　 ： JP4654440
Inventor ： ISHIDA Kiyohito, KAINUMA Ryosuke, SUTOU Yuji
keyword ： Material