Calibration and/or Reference Blocks should be used in every application. Standard blocks are available for angle beam calibrations and thickness calibrations of common materials.

Blocks manufactured from 1018 steel, 304 stainless steel, or 7075-T6 aluminum are commonly in stock (other materials require special quotes for price and delivery)
Contact us for more information regarding materials not listed, blocks not listed, or custom blocks

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Calibration Blocks
Reference Blocks
Thickness Calibration Blocks

Calibration Blocks

All blocks are checked dimensionally using measuring equipment traceable to the National Institute of Standards and Technology, NIST. The most commonly required calibration blocks are listed below.

Type	Part Number	Description	Case
ASTM E164 Calibration IIW-Type Block	TB7541-X	Meets AASHTO and AWS Type 1 block requirements. Calibrates distance and sensitivity settings. Measure refracted angle and sound exit point of angle beam transducers. U.S. customary units (inches).	F129
	TB1136-X	U.S. customary units (inches) block with Lucite® plug	F129
	TB1054-X	Metric Units	F129
	TB1137-X	Metric Units block with Lucite® plug	F129
US Air Force IIW-2 Calibration Block	TB5939-X	IIW-type block per U.S. Air Force NDI Manual T.O. 33B -1-1. Includes 2" and 4" radius cutouts for distance calibration. No. 3, No. 5 and No. 8 side drilled holes, and distance calibration marks to the 2" hole.	F129
RC AWS Block	TB7543-X	Determining resolution capabilities of angle beam transducers per AWS and AASHTO requirements.	F157
SC AWS Block	TB7545-X	Sensitivity and refracted angle calibration per AWS and AASHTO requirements.	F158
DC AWS Block	TB7547-X	Distance and beam index calibration for angle beam transducers per AWS and AASHTO requirements.	F159
DSC AWS Block	TB7549-X	Distance, sensitivity, refracted angle and beam index calibration for angle beam transducers per AWS and AASHTO requirements.	F160
DS AWS Block	TB7551-X	Calibration block for horizontal linearity and dB accuracy procedures per AWS and AASHTO requirements.	F161
30FBH Resolution Reference Block	TB7160-X	Evaluate near surface resolution and flaw size/depth sensitivity of UT equipment. No. 3, No. 5 and No. 8 ASTM flat bottom holes at ten metal travel distances from 0.050" to 1.250".	Included
NAVSHIPS Block	TB7567-X	Contains six No. 3 side drilled holes. Used for distance-amplitude calibration per NAVSHIPS 0900-006 -3010.	F162
ASTM E164 MAB Block	TB7150-X	Miniature Angle Beam (ROMPAS) Block. Distance, beam index, refracted angle and sensitivity calibration. One inch thick.	F197
ISO 7963 Steel	TB1065-X	Miniature Angle Beam Block Distance, beam index, refracted angle and sensitivity calibration. 25 mm thick.	F197

Replace the "X" in the part number with the appropriate number listed below to signify block material: 1 = 1018 Steel, 2 = 4340 Steel, 4 = 7075-T6 Aluminum, 5 = 304 Stainless Steel, 8 = 6-4 Titanium

Reference Blocks

We offer commonly used sets of reference blocks recommended by ASTM standards. These sets are all manufactured to ASTM E127 and ASTM E428 physical dimensions requirements. All reference blocks are provided with an ultrasonic response curve. We can provide, by special order, materials not listed and individual reference blocks. Contact us for more information regarding materials not listed, custom calibration blocks, or quotations on blocks not listed in this section.

Type of Set*	Part Number	Description of Set
Distance- Area Amplitude Set	TB6100-X	Set of 10 ASTM E 127 (7075 Alum) or ASTM E 428 (all other materials) basic set consisting of 3/64 at 3", 5/64 at 1/8", 1/4", 1/2", 3/4", 1-1/2", 3", and 6", and 8/64 at 3" and 6". This set is used for determining Dead Zone, Sensitivity, Distance and Area Amplitude Linearity Measurement.
Area- Amplitude Set	TB6200-X	Set of 8 ASTM E 127 (7075 Alum) or ASTM E 428 (all other materials) Area Amplitude Set consisting of 1/64, 2/64, 3/64, 4/64, 5/64, 6/64, 7/64, and 8/64 Flat Bottom Holes at 3". This set is used to determine the relationship between flaw size and echo amplitude by comparing signal response.
Distance- Amplitude Set-No. 3FBH	TB6303-X	Set of 19 ASTM E 127 (7075 Alum) or ASTM E 428 (all other materials) Distance Amplitude Set. All Flat Bottom Holes are the same and metal travel distances are 1/16", 1/8", 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-3/4", 2-1/4", 2-3/4" 3-1/4", 3-3/4", 4-1/4", 4-3/4", 5-1/4", and 5-3/4". This set is used to determine the relationship between metal distance and signal amplitude by comparing signal responses obtained.
Distance- Amplitude	TB6305-X	1/16"	1/2"	1"	2-1/4"	3-1/4"	4-1/4"	5-1/4"
Set-No. 5FBH		1/8"	5/8"	1-1/4"	2-3/4"	3-3/4"	4-3/4"	5-3/4"
Distance- Amplitude	TB6308-X	1/4"	3/4"	1-3/4"
Set-No. 8FBH		3/8"	7/8"
Sensitivity- Resolution Set	TB6025-X	Set of 9 ASTM E 127 (7075 Alum) or ASTM E 428 (all other materials) consisting of 1/64 at 3"9, 2/64 at 3", and 5/64 at 1/8", 1/4" 3/8", 1/2", 3/4" 1" and 1-1/2", and 1 ASTM E 317 Horizontal and Vertical Linearity Block used to evaluate the sensitivity, entry surface resolution, and horizontal and vertical linearity characteristics of UT equipment.

Replace the "X" in the part number with the appropriate number listed below to signify block material: 1 = 1018 Steel, 2 = 4340 Steel, 4 = 7075-T6 Aluminum, 5 = 304 Stainless Steel, 8 = 6-4 Titanium

Thickness Calibration Blocks

Blocks are held to tighter tolerances than called out in ASTM E797 Code.

Part Numbers	Material	Steps
2211E	304 Stainless Steel	0.100", 0.200", 0.300", 0.400", 0.500"
2211M	304 Stainless Steel	2.5 mm, 5.0 mm, 7.5 mm, 10.0 mm, 12.5 mm
2212E	1018 Carbon Steel	0.250", 0.500", 0.750", 1.00"
2212M	1018 Carbon Steel	6.25 mm, 12.5 mm, 18.75 mm, 25 mm
2213E	7075-T6 Aluminum	0.100", 0.200", 0.300", 0.400", 0.500"
2213M	7075-T6 Aluminum	2.5 mm, 5.0 mm, 7.5 mm, 10.0 mm, 12.5 mm
2214E	1018 Carbon Steel	0.100", 0.200", 0.300", 0.400", 0.500"
2214M	1018 Carbon Steel	2.5 mm, 5.0 mm, 7.5 mm, 10.0 mm, 12.5 mm

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Calibration Blocks