ASTM A435 Standard Specification Straight-Beam Ultrasonic Examination of Steel Plates
ASTM A 435 is a standard specification that covers the detailed procedure and accepted standard for straight beam, pulse-echo and ultrasonic examination of f rolled fully killed carbon and alloy steel plates, 1⁄2 inch and over in thickness.
TRUSTED BY
Precision-driven testing for dimensional accuracy and compliance
- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM A435 is a standardized specification for straight beam ultrasonic examination of steel plates to detect gross internal discontinuities. The procedure ensures that the steel plates are free from gross defects like pipe, ruptures, and laminations.
The specification can be called upon in purchase orders, contracts, or material requirements to specify the ultrasonic examination prior to acceptance. The specification is mainly used for quality assurance of steel plates.
Scope, Applications, and Benefits
Scope
ASTM A435 applies to carbon steel, alloy steel, and quenched and tempered steel plates that have been tested after heat treatment. This standard specifies the straight beam ultrasonic method used to evaluate the material and is intended to detect internal flaws. It also provides criteria for the acceptance or rejection of plates to ensure that they meet the specified levels of quality.
Applications
- Quality control of steel plate manufacturing
- Inspection of pressure vessel plates
- Structural steel verification
- Shipbuilding and offshore structures
- Power plant components
- Heavy engineering fabrication
- Oil and gas industry materials
Benefits
- Detects internal laminations and voids
- Ensures structural integrity of steel plates
- Prevents failure due to hidden defects
- Provides standardized acceptance criteria
- Supports compliance with contract specifications
- Enhances reliability and safety of fabricated components
- Non-destructive testing method
Test Process
Preparation & Calibration
Prepare surface, apply couplant, calibrate to 50–75% FSH (≈2.25 MHz), and test Q&T plates after heat treatment.
1Scanning
Scan the plate from one or both sides along set lines, including within 2 inches of all edges.
2Boundary Marking
Move the transducer to equalize back reflection and discontinuity signal, then mark the boundary.
3Evaluation
Assess discontinuities against specified acceptance criteria.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Carbon and alloy steel plates |
| Typical Test Frequency | 2.25 MHz (may vary based on thickness and grain size) |
| Reference Signal Level | 50–75% full-scale back reflection |
| Couplants Used | Water, soluble oil, glycerin |
| Scanning Coverage | Entire plate surface including edges |
| Test Specimen | 1 to 1.125 inch diameter |
Instrumentation Used for Testing
- Ultrasonic testing (UT) instrument
- Straight-beam ultrasonic transducer (1 to 1.125-inch diameter or 1-inch square)
- Calibration reference block
- Couplant (water, soluble oil, or glycerin)
- Scanning carriage or manual probe holder
- Thickness measurement device
- Marking tools for boundary identification
- Data recording and reporting system
Results and Deliverables
- Ultrasonic inspection reports
- Identification of internal discontinuities
- Location and size evaluation of defects
- Acceptance or rejection status
Why Choose Infinita Lab for ASTM A435?
At the core of this breadth is our network of 2,000+ accredited labs in the USA, offering access to over 10,000 test types. From advanced metrology (SEM, TEM, RBS, XPS) to mechanical, dielectric, environmental, and standardized ASTM/ISO testing, we give clients unmatched flexibility, specialization, and scale. You’re not limited by geography, facility, or methodology—Infinita connects you to the right testing, every time.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
ASTM A435 is a standard specification that covers the ultrasonic examination of straight-beam testing of rolled steel plates to detect internal discontinuities.
The test is performed to identify internal defects such as laminations, inclusions, and voids in steel plates to ensure their structural integrity and quality.
ASTM A435 primarily applies to carbon steel and alloy steel plates used in structural and pressure vessel applications.
The standard uses straight-beam ultrasonic testing where sound waves are transmitted perpendicular to the plate surface to detect internal defects.
The test can detect laminations, internal cracks, inclusions, and other subsurface discontinuities within steel plates.
Request a Quote
Submit your material details and receive testing procedures, pricing, and turnaround time within 24 hours.
Quick Turnaround and Hasslefree process
Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
