TM934-1 Barcol Impressor

Features：

1.A portable indentation hardness tester.

2.Single hand operation; no operating experience required; can test any workpiece 

which is reachable in any site.

3.Wide valid testing range equivalent to Brinell hardness 25-150HBW. Used to test 

the hardness of all kinds of aluminum, from very soft aluminum to very hard 

aluminum alloys.

4.Extended application. Model 934-1 is applied to test the hardness of aluminum, 

aluminum alloys, copper, copper alloys, fiber reinforced plastics and rigid plastics etc. 

The improved model of it is available to test very soft metals such as lead and tin and 

other soft materials such as soft plastics, rubber, felt and leather etc.

5.High sensitivity. Featured with 100 scales, much more sensitive than Webster 

hardness testers applied in aluminum alloys industry.

6.No supporting required. Can test from only one side of the workpiece. No need to 

move or support the workpiece. Used to test super large and thick worpieces and 

assembly parts.

7.Comply to standard ASTM B648-2000.

8.Easy conversion. The test results can be converted to HB, HR, HV and HW easily 

through conversion table.

Application：

1.Barcol Impressor is mainly applied to test aluminum and aluminum alloys. 

Webster is used to test aluminum alloy extrusions, sheet and tubings. 

Barcol Impressor is suitable to test pure aluminum, soft aluminum alloys, 

super thick aluminum alloys, aluminum alloys bars and assembled aluminum 

alloys parts (e.g. al-alloy door &window, scaling ladder etc.)

2.Relevant Standard: ASTM B648 (Test Method for Indentation Hardness 

of Aluminum Alloys by Means of a Barcol Impressor)

3.Barcol Impressor is also used to test fiber reinforced plastics and rigid plastics etc. 

Relevant Standard: ASTM D2583-07(Test Method for Indentation Hardness of Rigid 

Plastics by Means of a Barcol Impressor)

4.The improved models of Barcol Impressor are available to test softer plastics, very 

soft metals, rubber and leather etc.

Disadvantage:

1.The surfaces of work pieces need to be broad and flat. It is inconvenient to 

test the hardness of strips, small-sized pieces or work pieces with curved surfaces.

2.There will be conversion error. When testing the hardness of aluminum section 

materials, the Barcol hardness need to be changed into Webster hardness, but there 

is 2.7 HW discrepancy between Barcol conversion table and GB Standard YS/T420-

2000, so the Barcol conversion table should be used cautiously.

Standard package

1.Tester

2.Spare indenters (2 pcs)

3.High value Standard hardness block (1 pc)

4.Low value Standard hardness block (1 pc)

5.Calibration wrench

6.Supporting foot

7.Carrying case

Technical Parameters：