A portable instrument that can quickly test the hardness of soft metals on site, which meets China Nonferrous Standards YS/T420 and American standard ASTM B647. ﹡It is used to check the heat treatment effect of the material and judge whether the alloy composition of the material is qualified. ﹡Test the hardness of soft metal profiles, pipes, plates and other parts. ﹡Used to test long and heavy workpieces or assemblies that are inconvenient to be sent to the laboratory. ﹡Especially suitable for the qualification inspection of batches of products on the production site. ﹡The pressure needle can work for a long time at 200-250℃. ﹡There are many models for testing aluminum alloy, copper, copper alloy and mild steel.

Volume Process: 0~20HW Indication error: 0.5HW (5~17HW) Repeatability error: 0.5HW (5~17HW) Heavy volume: 0.5kg ﹡W-20 type is often used in the production and application of aluminum profiles. ﹡W-20a type should be used when the thickness of aluminum profile is greater than 6mm. ﹡The aluminum pipe with inner diameter greater than 10mm adopts W-20 type. ﹡The thin aluminum tube whose inner diameter is less than 6mm should be changed to W-20b type. ﹡W-B75 type is often used to test brass tubes. ﹡W-BB75 type is often used to test red copper tubes. ﹡W-B92 type is often used to test stainless steel strip or cold rolled steel strip.

Standard configuration Host Webster Hardness Block (High) Webster hardness block (low) Correction wrench Spare indenter Small screwdriver Instrument case Optional accessories Webster Hardness Block (High) Webster hardness block (low) Spare indenter Correction wrench Watch head glass

 

model	Scope of application	Hardness range	Workpiece size (mm)
W-20	Aluminum alloy	25~110HRE 58~131HV	Thickness 0.6-6 inner diameter >10
W-20a			Thickness 0.6-13 inner diameter >10
W-20b			Thickness 0.6-8 inner diameter >6
W-B75	brass	63~105HRF	Thickness 0.6-6 inner diameter >10
W-B75b			Thickness 0.6-8 inner diameter >6
W-BB75	8~100HRE	Thickness 0.6-6 inner diameter >10
W-BB75b		Thickness 0.6-8 inner diameter >6
W-B92	Cold rolled thin steel strip	50~92HRB	Thickness 0.4-6 inner diameter >10