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W-20 Webster hardness tester

The W‑20 series Webster hardness tester, an aluminum alloy–specific Webster hardness tester (also known as a clamp‑on hardness tester), is a lightweight instrument that enables rapid on‑site measurement of aluminum alloy hardness.

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Hardness testing instrument

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E-mail:

lbt@lbt.ltd

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+86-15102211717

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Description

Product Introduction:

The W‑20 series Webster hardness tester, an aluminum alloy–based instrument also known as a clamp‑on hardness tester, is a lightweight device that enables rapid on‑site measurement of aluminum alloy hardness. It offers quick and easy testing—simply apply the probe—and provides direct readings of hardness values. Compliant with China’s nonferrous metals standard YS/T 420 and the U.S. standard ASTM B647, it is one of the two instruments recommended by the YS/T 420 standard.

Main uses and scope of application:

1. Determine whether the workpiece has undergone heat treatment and inspect the heat‑treatment results.

2. Determine whether the workpiece is made of an unsuitable alloy.

3. Testing of excessively long, heavy workpieces or assembled components that cannot be conveniently transported to the laboratory.

4. Used for production inspection, acceptance inspection, and quality supervision inspection.

Key Functions and Features:

1. The aluminum alloy Webster hardness tester is suitable for testing aluminum alloy profiles, tubes, and sheets, and is particularly well-suited for rapid, non-destructive conformity inspections of product hardness at production sites, sales locations, or construction sites.

2. Standard hardness blocks have been tested on a standard hardness tester and are accompanied by a test report.

3. The Vickers hardness value can be converted into commonly used values for Vickers, Rockwell, and Brinell hardness, as well as tensile strength.

Technical Specifications:

Measurement range	0-20HW
Precision	0.5HW
Measurement Range	Equivalent to 20–110 HRE

W-20 Series Webster Hardness Tester Model Selection:

Model number	Specimen size/diameter mm	Net weight kg	Total weight kg	Package dimensions (mm)
W-20	Plates and profiles with a thickness ≤ 6, and tubes with an inner diameter ≥ 10.	0.5	1.1	280×230×80
W-20a	Plates and profiles with a thickness ≤ 13, and tubular materials with an inner diameter ≥ 10.	0.5	1.1	280×230×80
W-20b	Plates and profiles with a thickness ≤ 8, and tubes with an inner diameter ≥ 6.	0.5	1.1	280×230×80

Standard configuration:

Host	1 unit	Standard hardness block	2 pieces
Spare pressure needle	1 piece	Adjustment wrench	1 piece
Small screwdriver	1 piece	Instrument case	1 piece

Optional accessories for the Webster hardness tester:

1. Pressure needle

2. Standard Hardness Blocks

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FAQs

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Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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W-20 Webster hardness tester

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