GB/T 41079.1-2021Test methods for physical properties of liquid metals—Part 1: Determination of density (English PDF)

1 Scope

This document specifies a method for the determination of liquid metal density.

This document applies to the determination of liquid metal density in the range of room temperature to 300 °C. It can also be used as a reference to the density measurement of molten salt and metal melt above 300 °C.

2 Normative references

The following documents contain the provisions which, through normative reference in this document, constitute the essential provisions of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document.

GB/T 1423 Method of measurement of density for precious metals and their alloys

GB/T 4339 Test methods for thermal expansion characteristic parameters of metallic materials

GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Principles

On the basis of Archimedes' principle, measure the mass of a heavy hammer with known mass after it is immersed in liquid metal, and obtain the buoyancy of the heavy hammer to calculate the density of the liquid metal. The schematic diagram is shown in Figure 1.

6 Samples

6.1 Liquid sample. The volume shall be not less than 50 mL, and it can completely immerse the heavy hammer. The surface oxide layer shall be removed before testing.

6.2 Solid sample. It shall be made into particles or small pieces of solid that are easy to be loaded; the volume of the sample after melting shall be not less than 50 mL, and it can completely immerse the heavy hammer.

7 Test steps