Claude says:
"""
Based on these specifications, this appears to be 1095 High Carbon Spring Steel or a very similar high-carbon spring steel alloy. Here's why:

1. The hardness of Rockwell C48 is typical for tempered 1095 steel
2. The tensile strength values (184 ksi ultimate, 116 ksi yield) match closely with 1095 spring steel
3. The density of 7.85 g/cc is standard for high-carbon steels
4. The "Spring" temper designation is particularly telling, as 1095 is commonly used for spring applications
5. The very thin minimum thickness capability (0.17-0.19mm) suggests this is being used for precision spring applications, which is one of 1095's primary uses

The kerf width and minimum feature specifications suggest this is likely being used for precision laser cutting applications, which is common for spring steel components.
"""