Quickly evaluate the surface hardness of green sand molds
The Dietert No. 473 Green Hardness Tester, B Scale, is a portable foundry instrument designed to measure the surface hardness of green sand molds. The test provides a convenient indication of the resistance of the mold surface to localized deformation, helping foundries monitor an important property of prepared molding sand.
Direct measurement on the mold surface
The tester is applied directly to the prepared green sand surface. Its penetrating element responds to the resistance of the molding material, allowing the operator to obtain a relative hardness reading directly from the analog dial. The B scale provides readings from 0 to 100.
Useful for foundry process control
Green hardness is influenced by the condition and preparation of the molding sand. Regular hardness measurements can therefore be incorporated into foundry quality-control procedures to compare molds, monitor process consistency and identify changes in molding conditions.
A recognized instrument for green sand testing
The Dietert 473 has a long history in foundry testing. Technical literature identifies the No. 473 Green Hardness Tester as an instrument for determining the resistance of a green mold surface to deformation over a small area. The B-scale test is also used in foundry work involving the development and evaluation of molding and core materials.
Portable analog design
The compact mechanical design requires no electronic display or external power supply for normal hardness measurements. The large analog dial provides an immediate reading, making the instrument convenient for measurements in the laboratory or close to molding operations.
Specifications
| Manufacturer | Dietert Foundry Testing Equipment |
|---|---|
| Model | No. 473 |
| Geneq reference | DI473-000 |
| Instrument | Green hardness tester |
| Scale | B Scale |
| Scale range | 0–100 |
| Application | Surface hardness testing of green sand molds |
| Display | Analog dial |
Frequently Asked Questions
What does the Dietert 473 measure?
It measures the relative surface hardness of green molding sand. In foundry terminology, green hardness describes the resistance offered by the surface of a green mold to localized deformation.
Is a higher B-scale reading a harder mold surface?
Yes. A higher reading indicates greater resistance to penetration and therefore a harder surface under the conditions of the test.
Is green hardness the same as green compression strength?
No. They evaluate different properties. Green hardness is a localized surface measurement, while green compression strength determines the load a standardized green sand specimen can withstand under compression.
Can the Dietert 473 be used directly on a mold?
Yes. Its portable configuration is intended to permit hardness measurements directly on an accessible prepared molding surface, making it useful for both laboratory evaluations and production-oriented checks.
Does the Dietert 473 require electrical power?
The No. 473 shown here is a mechanical instrument with an analog dial and does not require an external electrical power supply for normal hardness measurements.
Do you have a question?
min 10 ch