Qualitest offers a large Hardness Test Block selection in the industry, all the blocks are calibrated and accredited to ISO guide 25 and will meet automotive and aerospace standards.
Minimum order of 5
Rockwell Regular Hardness Test Block
Hardness Scale Test Block | Part No. | indenter | Load | Ranges | Material |
A Scale | QTRCTB-RA10 | C Diamond | 60 Kg | A60 - A84 | Steel |
A Scale | QTRCTB-RA20 | C Diamond | 60 Kg | A20 - A59 | Brass |
A Scale | QTRCTB-RA30 | A Diamond (Carbide) | 60 Kg | A88 & up | Carbide |
B Scale | QTRCTB-RB10 | 1/16" Ball | 100 Kg | B10 - B92 | Brass |
B Scale | QTRCTB-RB20 | 1/16" Ball | 100 Kg | B90 - B130 | Steel |
C Scale | QTRCTB-RC10 | C Diamond | 150 Kg | All | Steel |
D Scale | QTRCTB-RD10 | C Diamond | 100 Kg | All | Steel |
E Scale | QTRCTB-RE10 | 1/8" Ball | 100 Kg | All | Brass |
F Scale | QTRCTB-RF10 | 1/16" Ball | 60 Kg | All | Brass |
G Scale | QTRCTB-RG10 | 1/16" Ball | 150 Kg | G2.5 - G64 | Brass |
G Scale | QTRCTB-RG20 | 1/16" Ball | 150 Kg | G66 & up | Steel |
H Scale | QTRCTB-RH10 | 1/8" Ball | 60 Kg | All | Brass |
K Scale | QTRCTB-RK10 | 1/8" Ball | 150 Kg | All | Brass |
L Scale | QTRCTB-RL10 | 1/4" Ball | 60 Kg | All | Brass |
M Scale | QTRCTB-RM10 | 1/4" Ball | 100 Kg | All | Brass |
P Scale | QTRCTB-RP10 | 1/4" Ball | 150 Kg | All | Brass |
R Scale | QTRCTB-RR10 | 1/2" Ball | 60 Kg | All | Brass |
S Scale | QTRCTB-RS10 | 1/2" Ball | 100 Kg | All | Brass |
V Scale | QTRCTB-RV10 | 1/2" Ball | 150 Kg | All | Brass |
NOTE: Aluminum Test blocks are available in "B", "E", "F", "G", "H", "K" Scales, but ranges are more limited. |
Rockwell Superficial Hardness Test Block
Hardness Scale Test Block | Part No. | Penetrator | Load | Ranges | Material |
15N Scale | QTRHTB-S15N10 | N Diamond | 15 Kg | All | Steel |
30N Scale | QTRHTB-S30N10 | N Diamond | 30 Kg | All | Steel |
45N Scale | QTRHTB-S45N10 | N Diamond | 45 Kg | All | Steel |
15T Scale | QTRHTB-S15T10 | 1/16" Ball | 15 Kg | All | Brass |
30T Scale | QTRHTB-S30T10 | 1/16" Ball | 30 Kg | All | Brass |
45T Scale | QTRHTB-S45T10 | 1/16" Ball | 45 Kg | All | Brass |
15W Scale | QTRHTB-S15W10 | 1/8" Ball | 15 Kg | All | Brass |
30W Scale | QTRHTB-S30W10 | 1/8" Ball | 30 Kg | All | Brass |
45W Scale | QTRHTB-S45W10 | 1/8" Ball | 45 Kg | All | Brass |
15X Scale | QTRHTB-S15X10 | 1/4" Ball | 15 Kg | All | Brass |
30X Scale | QTRHTB-S30X10 | 1/4" Ball | 30 Kg | All | Brass |
45X Scale | QTRHTB-S45X10 | 1/4" Ball | 45 Kg | All | Brass |
15Y Scale | QTRHTB-S15Y10 | 1/2" Ball | 15 Kg | All | Brass |
30Y Scale | QTRHTB-S30Y10 | 1/2" Ball | 30 Kg | All | Brass |
45Y Scale | QTRHTB-S45Y10 | 1/2" Ball | 45 Kg | All | Brass |
Brinell Test Blocks and Accessories
ASTM E-10, ISO 6506
All of our Brinell Test Blocks come certified to applicable standards. We adhere to a strict procedure for the calibration of these blocks, and the accuracy of the tester is maintained using a proving ring and load cell both traceable to N.I.S.T. The readings themselves are done using a stage micrometer also calibrated and traceable to N.I.S.T.

Note: Circle and gridded blocks available at additional cost. Dimensions for the most common blocks will be 6" x 2" x 3/4". The other dimensions are 6" x 41/2" x 3/4" or 2" x 2". It depends on ASTM E10-17 rules for dimensions. Call for prices and availability. The material used - steel, brass or aluminum depends on hardness.
Micro Hardness Test Blocks
ASTM E-92 - ISO 6507 & 4545
ASTM E-384 - ISO 6507
Our range of micro hardness test blocks exceeds industry standards. All of our micro test blocks are mirror-polished and mounted to provide the best possible test surface.
Each mirror-polished Heavy Load Vickers test block has the same surface area provided by our Rockwell test blocks, so that you get the most test opportunities for your money.
Micro Hardness Test Blocks
MV010 Vickers (1 gram to 1,000 gram) All Ranges
MV020 Heavy Load Vickers (1 Kg to 50 Kg) All Ranges
MK010 Knoop (1 gram to 1,000 gram) All Ranges
Note: When ordering please specify Knoop or Vickers, Load and the Hardness Range Number you require. On most Test Block Grids are available at additional cost.
Micro Hardness Accessories
P1110 Vickers Diamond Penetrator*
* Vickers Indentor available for most of the different makes. Please specify the make of your hardness tester when ordering.
P1120 Knoop Diamond Penetrator*
* Knoop Indentor available for most of the different makes. Please specify the make of your
hardness tester when ordering.
Note: Dual calibration on the same block is available upon request.