What is 1095 spring steel and why is it used in wakizashi swords?
Updated Feb 2026
1095 spring steel is a high-carbon steel with approximately 0.95% carbon content and properties that make it particularly well suited for quality Japanese-style sword construction. The '1095' designation indicates a high-carbon steel with a carbon content at the upper range of the high-carbon category, giving it excellent hardness potential when properly heat-treated. The 'spring steel' characteristic refers to the alloy's combination of hardness and resilience - its ability to return to its original shape after being subjected to stress without permanent deformation. For a display collectible, these properties translate into a blade that holds its geometry reliably under normal display conditions and responds well to heat treatment. Like T10 carbon steel, 1095 is capable of differential heat treatment that produces a hamon temper line, making it a serious choice for collectors who want a wakizashi with visible construction detail. The 1095 grade is less widely publicized than T10 in the collectible sword market but is equally respected by experienced collectors who are familiar with its properties.