W-20 to W-B92 Webster Hardness Tester

Keywords: Webster hardness tester, portable metal hardness tester, aluminum hardness tester, brass hardness tester, stainless steel hardness tester

The W Series Webster hardness tester provides a quick, portable way to check the hardness of metal sheet and strip. Clamp the tester onto the workpiece and read the value directly from the dial. Choose the model and matching indenter for the material being tested, including aluminum, brass, copper, and stainless steel.

Key Features

1. Direct-read hardness measurement for on-site inspection.

2. Clamp-on operation supports quick checks without complex setup.

3. Eight model configurations cover different metal materials and opening sizes.

4. Interchangeable indenter assemblies are selected to match the model and test material.

5. Portable instrument with a protective carrying case.

6. Designed for batch inspection in production, sales, and construction settings.

Technical Specifications

Parameter	Specification
Hardness indication range	0–20 HW (equivalent to 50–90 HRB, per source specifications)
Indicator error	0.5 HW within 5–17 HW
Repeatability error	0.5 HW within 5–17 HW
Instrument weight	Approx. 0.5 kg
Specimen thickness / inner diameter	Varies by model; see model comparison below

Model Differences

Model	Suitable material	Hardness range	Opening size*
W-20	Aluminum	25–110 HRE / 58–131 HV	6 mm / Ø10 mm
W-20A	Aluminum	25–110 HRE / 58–131 HV	13 mm / Ø10 mm
W-20B	Aluminum	25–110 HRE / 58–131 HV	8 mm / Ø6 mm
W-B75	Brass	63–105 HRF	6 mm / Ø10 mm
W-B75B	Brass	63–105 HRF	8 mm / Ø6 mm
W-BB75	Copper	18–100 HRE	6 mm / Ø10 mm
W-BB75B	Copper	18–100 HRE	8 mm / Ø6 mm
W-B92	Stainless steel	50–92 HRB	6 mm / Ø10 mm

Applications

1. Checking aluminum, brass, copper, and stainless-steel sheet or strip.

2. Performing quick, nondestructive screening of metal products at production sites.

3. Inspecting metal materials at sales locations and construction sites.