NM01IIWTY2CS

Curtis — IIW Type 2 UT Reference Block

Overview

The Curtis IIW Type 2 Reference Block is a precision-machined ultrasonic calibration standard designed for the setup and performance verification of longitudinal-wave and shear-wave transducers. Manufactured from carbon steel, the block provides an acoustically representative reference for ultrasonic inspection procedures performed on carbon-steel welds, structures, and industrial components.

The IIW Type 2 is a modified version of the traditional IIW Type 1 design. It incorporates additional reference holes, distance-calibration markings, and a 2 in radius cutout superimposed on the 4 in radius. These features support distance calibration, sensitivity adjustment, probe-index determination, refracted-angle verification, resolution assessment, and surface-wave inspection.

With nominal dimensions of 12 × 4 × 1 in, SKU IIWTY2CS is suitable for professional field, fabrication, maintenance, laboratory, and QA/QC ultrasonic testing programs.

What's Included

Note: Storage case, dimensional certification, serialization, and additional documentation are not included unless specified separately.

Box Dimensions & Shipping Weight (Estimated)

Key Specifications

Calibration Functions

Performance Features

Modified IIW Type 1 Geometry
The Type 2 design adds calibration features to the traditional IIW Type 1 configuration for expanded sensitivity, resolution, and distance-verification procedures.

Carbon Steel Construction
Provides acoustic characteristics suitable for calibration work associated with carbon-steel welds, structures, and industrial components.

2 in and 4 in Reference Radii
The opposing radii support sound-path and distance calibration across commonly used ultrasonic inspection ranges.

Multiple Sensitivity Holes
The 3/64, 5/64, and 8/64 in through-holes provide reference reflectors for sensitivity checks, resolution assessment, and surface-wave evaluation.

Angle-Beam Probe Verification
Supports determination of the wedge exit point and evaluation of the actual refracted beam angle.

Longitudinal- and Shear-Wave Support
Can be used with compatible straight-beam and angle-beam transducers for multiple instrument-calibration functions.

User-Friendly Design

• Inch-based dimensions support U.S. customary inspection procedures

• Precision-machined geometry supports repeatable calibration

• Multiple reference features reduce the need for separate blocks

• Suitable for straight-beam and angle-beam transducers

• Reference markings support routine distance calibration

• Durable carbon-steel construction supports repeated professional use

• Suitable for pre-inspection and post-inspection equipment checks

• Can be integrated into field and laboratory UT programs

Built for Industrial Environments

• Designed for professional ultrasonic testing programs

• Suitable for fabrication, construction, manufacturing, and maintenance

• Practical for field and laboratory equipment verification

• Supports calibration before and during ultrasonic examinations

• Carbon-steel construction provides relevant acoustic performance

• Precision-machined features support traceable QA/QC procedures

• Suitable for technician training and qualification activities

• Intended for use according to applicable UT procedures and standards

Compatibility

Compatible with:

• Ultrasonic flaw detectors

• Straight-beam transducers

• Angle-beam transducers and wedges

• Common shear-wave inspection probes

• Pulse-echo ultrasonic testing systems

• Carbon-steel weld inspection procedures

• ASTM E164-based inspection workflows

• IIW-based ultrasonic calibration procedures

• Field and laboratory UT programs

• Industrial QA/QC documentation systems

The block material, dimensions, certification, and reference geometry should be confirmed against the applicable inspection procedure before use.

Ideal Applications

• Ultrasonic flaw-detector calibration

• Longitudinal-wave calibration

• Shear-wave distance calibration

• Sensitivity adjustment

• Probe-index determination

• Refracted-angle verification

• Resolution assessment

• Surface-wave inspection setup

• Weld inspection preparation

• Carbon-steel structural inspection

• Fabrication QA/QC

• Maintenance inspection programs

• NDT technician training

• Field equipment verification

• Laboratory calibration workflows

About Curtis

Curtis manufactures ultrasonic calibration blocks, reference standards, and related accessories for professional non-destructive testing applications. Its products support inspection teams working in fabrication, manufacturing, construction, maintenance, technician training, laboratory testing, and industrial quality-control environments.