Detailed description: SH-21A Handheld Metal Hardness Tester Japan JFE

Model: SH-21A-E

Product Name: Handheld Hardness Tester

Brand: Japan JFE

Applications:

Hardness measurement of large structures, vehicles, ships, steel towers, bridges, aviation aircraft, etc.

It is used to measure the hardness of particularly hard-to-reach locations, such as: grooved areas and internal R-parts of complex parts, metal casting, gears, crankshafts and components.

Portable measurement

Online measurement-installed on the production line for online measurement

Installed on the measuring table to measure the hardness of tiny objects

Installed on the measuring table to measure the hardness of tiny objects

Features:

It can be measured in a few seconds, reducing the measurement time.

The detection trace is extremely small (approximately 0.1mm2), which is most suitable for measuring surface hardened metal products, which can maintain the perfect appearance of the product.

The hardness value can be read directly (HV, HRC, HS, HB), so the hardness value can be measured at one time without calculation formula.

The material strength level can be converted according to the tensile strength (N/mm2).

The measurement location and material (wood, iron, resin, etc.) do not affect the measurement.

Can store up to 2000 data, and can transmit the data to the PC.

Built-in 10 pieces of calibration memory, every time the nature of the work changes, there is no need to re-calibrate.

Convenient to carry charging bag, convenient for measurement in places where electricity cannot be connected.

The probe uses a static pressure type, eliminating the need for temporary parts and annual replacement costs.

The upper/lower limit alarm can be set to notify whether the allowable limit of the workpiece is exceeded during measurement.

An external printer can be connected.

Product specifications:

model

SH-21A-E (electric/manual switchable probe)

Measuring head

Micro-Vickers diamond indenter (face angle of -136º)

Measuring range	1. Rockwellhardness：10.0~70.0HRC 2. Vickershardness：100~999HV 3. Shore hardness：20~99.9HS 4. Brinell hardness：85~550HBW
Repeatability	HRC:+1.0HRC/HV:+(3%rdg)HV/HS:+1.0HS/HBW:+(3%rdg)HBW
Applicable test materials	With steel as the main material, other metal materials can also be measured after calibrating the standard hardness test block。
monitor      Digital display (LCD, 4 digits) and EL backlight data storage 2000 pcs
Digital display device	1HV，0.1HRC，0.1HS，1HBW，1N/mm2（tensile strength）
Allowable operating temperature	0~50ºC
power supplyAC adapter (100~200V) or lithium electronic rechargeable battery, can operate continuously for 8 hours (new battery)
Outside size	Display: 97mm(W)x172mm(H)x50mm(D) Probe diameter: 50mm, length: 170.5mm
Carrying case size	389mm(W)x 132mm(H) x 200mm(D)

SH indentation calculated value

Load P=about 2kgf (about 20N)

Hardness HV

Hardness calculation value indentation sizeCalculated value of indentation depth	Conversion value HRC
100	0.193	0.028	-
200	0.136	0.019	(11)
300	0.111	0.016	30
400	0.096	0.014	41
500	0.086	0.012	49
600	0.079	0.011	55
700	0.073	0.010	60
800	0.068	0.010	64
900	0.064	0.009	67

Load P=about 1kgf (about 10N)

Hardness HV

Hardness calculation value indentation size	Calculated value of indentation depth	Conversion value HRC
100	0.136	0.019	-
200	0.096	0.014	(11)
300	0.079	0.011	30
400	0.068	0.010	41
500	0.061	0.009	49
600	0.056	0.008	55
700	0.051	0.007	60
800	0.048	0.007	64
900	0.045	0.006	67

Measurement considerations

1．       The influence of surface roughness

hardness	Surface roughness	0.8a	1.6a	3.2a
31.5HRC	X	31.5	31.7	30.9
	Ó	0.4	0.5	0.8
50.8HRC	X	50.5	50.5	50.3
	Ó	0.3	0.3	0.6
65.5 HRC	X	65.4	65.3	65.1
	Ó	0.2	0.2	0.4

X: average

Ó: The standard deviation measurement frequency is 100

2. Measurable size (2kgf/approximately 20N load)

①Size: 15mm (width) x15mm (length) or larger

②Thickness: t=7mm or greater

③Minimum diameter of the ball: 50mm or greater

3. Angle deviation

Probe size

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