Mitech MW-20b Webster Hardness Tester

Mitech MW-20b Webster Hardness Tester

Product Overview

The Mitech MW-20b is a compact and portable Webster hardness tester specifically engineered for testing aluminum and aluminum alloy materials. Designed with a clamp-type structure, this handheld device allows fast, non-destructive hardness testing directly on-site without needing to cut samples or perform complex setups. It delivers immediate readings in HW (Webster Hardness) and helps verify heat treatment, detect improper alloy usage, and ensure quality in production environments.

The MW-20b is widely used across aluminum production, construction, and quality inspection sectors, particularly in the fabrication of windows, doors, and curtain walls. It is a trusted solution for achieving reliable quality control, engineering approval, and reduced operational costs.

Key Features

• Portable and easy to handle with one hand

• Allows fast and efficient hardness testing on-site

• Non-destructive testing without sample removal or preparation

• Suitable for various aluminum profile shapes and sizes

• Rugged and impact-resistant design, remains accurate after multiple drops from 0.5 meters

• Corrosion-resistant housing, maintains precision after prolonged salt spray exposure

• Analog dial separated from the pressing area, making it easy to view during use

• Includes a calibration block for fast zero-checking and consistent accuracy

Applications

• Inspection of aluminum and aluminum alloy products in production

• Quality control in window, door, and curtain wall manufacturing

• Verification of proper heat treatment processes

• Identification of incorrect alloy types in raw materials or components

• Evaluation of long or heavy parts unsuitable for standard bench-top hardness testers

• Use by technical inspection teams and construction quality assurance staff

Working Principle

The MW-20b uses an indentation-based method where a spring-loaded indenter creates a shallow mark on the test surface. The depth of this mark is inversely proportional to the material’s hardness. The hardness value is read directly on an analog dial in Webster Hardness units (HW), which can be converted to Vickers (HV) or Rockwell (HR) scales using standard conversion charts.

• 0 HW: indicates very soft material or improper test alignment

• 20 HW: indicates the maximum reading on the scale

Specifications

• Measuring Range: 0 to 20 HW

• Resolution Accuracy: 0.1 HW

• Main Unit Weight: 0.5 kg

• Package Dimensions: 29.5 × 21.5 × 12 cm

• Total Weight (with packaging): 1.5 kg

• Communication/Storage: Not applicable

• Working Time: Not applicable (manual device)

Operating Method and Safety Notes

• Ensure the test surface is flat and perpendicular to the indenter for accurate readings

• Apply steady grip pressure during testing to prevent inconsistent results

• Do not twist the workpiece during measurement to avoid needle damage

• Avoid dry or “air” testing, which may cause premature wear on the red pointer

• Hold the tester steady until the reading stabilizes and view the dial head-on to avoid misreadings

• Never disassemble the measuring head, as it contains factory-calibrated components

Maintenance Guidelines

• Clean the device regularly with a soft, dry cloth, especially the dial window

• Store in a dry and dust-free environment to prevent rust or corrosion

• Protect from impact; although durable, precision mechanisms can still be damaged

• Use the original storage case when the tester is not in use

• If servicing is required, consult qualified personnel—internal adjustments should not be attempted by untrained users

The Mitech MW-20b is a reliable and efficient choice for quick aluminum hardness testing, combining durability, simplicity, and professional-grade precision in a field-ready form.