1. Spectral standard samples of pure iron and cast iron

2. Carbon steel spectral standard sample

3. Spectral standard samples of medium and low alloy steel

4. Spectral standards for high alloy steel and stainless steel

5. Spectral standard sample of tool steel

(Block) standard sample

1. Spectral standard samples of pure iron and cast iron

2. Carbon steel spectral standard sample

3. Spectral standard samples of medium and low alloy steel

4. Spectral standards for high alloy steel and stainless steel

5. Spectral standard sample of tool steel

6. High temperature alloy spectral standard sample

7. Spectral calibration samples (10 #, 20 #, 45 #, 20MnSi, Q235, etc.)

8. Oxygen nitrogen hydrogen gas standard sample

9. Copper and copper alloy spectral standards

10. Spectral standards for aluminum and aluminum alloys

11. Other non-ferrous metal spectral standards (zinc and zinc alloys, magnesium and magnesium alloys, lead and lead alloys, etc.)