Features
- Rockwell Hardness Test Blocks – All Scales
- Superficial Rockwell Hardness Test Blocks – All Scales
- Brinell Hardness Test Blocks – All Scales
- Vickers Hardness Test Blocks – All Scales
- Knoop Hardness Test Blocks – All Scales
- Leeb Hardness Test Blocks
- Certified and Non-Certified blocks available
- Penetrators – All Scales
- Anvils -All types
- Phase II offers a vast array of different hardness test blocks for Rockwell, Brinell and Vickers scales, as well as Portable hardness testers
- Phase II hardness test blocks are made of high grade materials to insure unmatched accuracy and repeatability throughout the entire block.
- Phase II Hardness test block surfaces are precision ground and lapped to an average finish of less than 2uin.
- Hardness Test blocks always engineered to obtain highly sensitive and accurate readings.
- All Made in the USA hardness test blocks conform to current ASTM specifications
- Traceability to NIST is offered on HRC steel blocks only.
- Prestigious Accredited laboratory by A2LA and NVLAP in the USA
Rockwell Hardness Test Blocks (Steel):


Part No. |
Description |
Shape |
Range |
Comments |
900330-9413 |
Rockwell A |
Round |
80-88 |
Phase II std. |
900330-9414H |
Rockwell B |
Square |
85-100 |
Made in USA |
900330-9414L |
Rockwell B |
Square |
60-80 |
Made in USA |
900330-9414C |
Rockwell B |
Round |
85-100 |
Phase II std. |
900330-9414F |
Rockwell B |
Round |
60-80 |
Phase II std. |
900330-9415C |
Rockwell C |
Round |
20-30’s |
Phase II std. |
900330-9415D |
Rockwel |
Round |
20-30’s |
Phase II NIST certified |
900330-9415E |
Rockwell C |
Square |
20-30’s |
Made in USA/NIST cert. |
900330-9416C |
Rockwell C |
Round |
40’s-50’s |
Phase II std. |
900330-9416D |
Rockwell C |
Round |
40’s-50’s |
Phase II NIST certified |
900330-9416E |
Rockwell C |
Square |
35-55 |
Made in USA/NIST cert. |
900330-9417C |
Rockwell C |
Round |
60-70 |
Phase II std. |
900330-9417D |
Rockwell C |
Round |
60-70 |
Phase II NIST certified |
900330-9417E |
Rockwell C |
Square |
60-70 |
Made in USA/NIST cert. |
900340-9001 |
Superficial HR15N |
Round |
70-91 |
Phase II std. |
900340-9002 |
Superficial HR30N |
Round |
42-80 |
Phase II std. |
900340-9003 |
Superficial HR45N |
Round |
20-70 |
Phase II std. |
900340-9004 |
Superficial HR45T |
Round |
55-72 |
Phase II std. |
900340-9001 |
Superficial HR30T |
Round |
70-82 |
Phase II std. |
900340-9001 |
Superficial HR15T |
Round |
88-93 |
Phase II std. |
3pc NIST certified test block kit
Part No. 900330-9410
3pc set includes HRC blocks w/NIST certification for each block in custom carry case
NIST Master Calibration Kit-C scale
Part No. 900330-9410M
Kit includes same HRC test blocks as above as well as a certified diamond indentor in custom carry case
NIST Master Calibration Kit-C/N scale
Part No. 900330-9410Z
Kit includes same test blocks as above as well as a certified Combo C&N scale diamond indentor in custom carry case
Rockwell Hardness Test Blocks (Aluminum):

Part No. |
Description |
Shape |
Range |
Comments |
900330-9414AH |
Rockwell B |
Square |
80’s |
Made in USA |
900330-9414AL |
Rockwell B |
Square |
50’s |
Made in USA |
900330-9418H |
Rockwell E |
Square |
90’s |
Made in USA |
900330-9418L |
Rockwell E |
Square |
60’s |
Made in USA |
Rockwell Hardness Test Blocks (Brass)

Part No. |
Description |
Shape |
Range |
Comments |
900330-9414BH |
Rockwell B |
Square |
80’s |
Made in USA |
900330-9414BL |
Rockwell B |
Square |
50’s |
Made in USA |
Brinell Hardness Test Blocks:

ASTM E10
ISO 6506
All of our Made in USA Brinell Hardness 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.
Part No. |
Description |
Shape |
Range |
Comments |
900355-1000/150 |
3000kg Steel |
Round |
150-250 |
Phase II std. |
900355-1000/250 |
3000kg Steel |
Round |
250-400 |
Phase II std. |
900355-3000 |
3000kg Steel |
Rectangle |
All |
Steel (USA) (Certified) |
900355-1000 |
1000kg Steel |
Rectangle |
All |
Steel (USA) (Certified) |
900355-0250 |
250kg Steel |
Rectangle |
All |
Steel (USA) (Certified) |
900355-0250 |
250kg Steel |
Rectangle |
All |
Steel (USA) (Certified) |
900355-1500 |
1500kg Steel |
Rectangle |
All |
Steel (USA) (Certified) |
900355-3010 |
3000kg |
Rectangle |
Low |
Aluminum (USA) (Certified) |
900355-3020 |
3000kg |
Rectangle |
High |
Aluminum (USA) (Certified) |
900355-3030 |
3000kg |
Rectangle |
100-200 |
Steel (USA) (Certified) |
900355-3040 |
3000kg |
Rectangle |
250-350 |
Steel (USA) (Certified) |
900355-3050 |
3000kg |
Rectangle |
500+ |
Steel (USA) (Certified) |
Vickers Hardness Test Blocks/Knoop Hardness Test Blocks:
Must advise the load and hardness range to order
Part No. |
Description |
Range |
Comments |
900390-V010 |
Vickers (1 gram to 1,000 gram) |
All |
Made in USA |
900390-V020 |
Heavy Load Vickers (1 Kg to 50 Kg) |
All |
Made in USA |
900390-K010 |
Knoop (1 gram to 1,000 gram) |
All |
Made in USA |
Leeb Hardness Test Blocks:

Part No. |
Description |
Shape |
Range |
Comments |
PHT1300-01 |
Leeb “D” Test Block |
Round |
750-800 |
Phase II std. |
PHT1300-02 |
Leeb “D” Test Block |
Round |
590-670 |
Phase II std. |
PHT1300-03 |
Leeb “D” Test Block |
Rectangle |
490-570 |
Phase II std. |
PHT1300-01cert |
Leeb “D” Test Block |
Rectangle |
750-800 |
NIST Certified |
900355-0250 |
Leeb “G” Test Block |
Rectangle |
590-670 |
For use with “G” impact devices |
Diamond Penetrators for Hardness Testers:

Part No. |
Description |
Comments |
900330-9440 |
Rockwell C scale |
Phase II std. |
900330-9440 |
Rockwell C scale |
Rockwell C scale |
900330-9440A |
Rockwell C scale |
Grade A (USA) |
900330-9440B |
Rockwell C scale |
Grade B (USA) |
900330-9440C |
Combination C&N scale |
Made in USA |
900390-0100 |
Vickers Indentor – Phase II |
Phase II std. |
900390-0100C |
Vickers Indentor Certified |
Made in USA |
900390-0150 |
Knoop Indentor – Phase II |
Phase II std. |
900390-0150C |
Knoop Indentor Certified |
Made in USA |
Penetrators: Carbide Ball:

Part No. |
Description |
Comments |
900330-9441 |
1/16” Carbide Ball |
Phase II std. |
900330-9441C |
1/16” Carbide Ball |
Certified (USA) |
900330-18 |
1/8” Carbide Ball |
Phase II std. |
900330-18C |
1/8” Carbide Ball |
Certified (USA) |
900330-14 |
1/4” Carbide Ball |
Phase II std. |
900330-14C |
1/4” Carbide Ball |
Certified (USA) |
900330-12 |
1/2” Carbide Ball |
Phase II std. |
900330-12C |
1/2” Carbide Ball |
Certified (USA) |
900355-010 |
Brinell 10mm Carbide Ball |
Phase II std. |
900355-010C |
Brinell 10mm Carbide Ball |
Certified (USA) |
900355-050 |
Brinell 5mm Carbide Ball |
Phase II std. |
900355-050 |
Brinell 5mm Carbide Ball |
Certified (USA) |
900355-025 |
Brinell 2.5mm Carbide Ball |
Phase II std. |
900355-025 |
Brinell 2.5mm Carbide Ball |
Certified (USA) |
Anvils: 20mm shank:

Fits Models 900-330, 900-365, 900-375(Pre-2016), 900-384 & 900-388
Part No. |
Description |
900365-9405 |
2” Dia. Anvil (flat) |
900365-9411 |
Large Dia. Anvil (Flat) |
900365-9412 |
V-Anvil |
900365-9413 |
8” X-Large Dia. Anvil (Flat) |
900365-625 |
Combo Spot V / Spot Anvil |
900365-630 |
Diamond Spot Anvil |
900365-700 |
Goose Neck Kit(internal testing) |
Anvils: 19mm shank:

Fits Models 900-331, 332, 345, 900-346, 900-367, 900-387, 375A, 410, 415, 420, 440
Part No. |
Description |
900331-9404 |
Mini V-Anvil (10mm) |
900331-9405 |
2” Dia. Anvil (flat) |
900331-9406 |
1/2” Spot Anvil |
900331-9407 |
V-Anvil (1.57″) |
900331-9411 |
Large Dia. Anvil (Flat) |
Fits the following brands and models(19mm):
Phase II |
900-331, 900-331D, 900-332, 900-345, 900-347, 900-348, 900-363, 900-364, 900-365, 900-366, 900-367, 900-385, 900-386, 900-387, 900-388 |
Starrett |
3814, 3816B |
SPI |
15-817-0, 15-818-8 |
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