ASTM A370 - Bend

Mechanical Testing of Steel Products - Bend

Application Overview

Test Method Summary

ASTM A370 defines test methods and definitions for mechanical testing of steel products. The standard references ASTM E190 and E290 for the test methods.

ASTM E190 covers guided bend testing of welds for the determination of reliability and ductility in ferrous and nonferrous products. The guided bend test is performed by placing a rectangular specimen symmetrically on the U-shaped support fixture that is mounted to the testing machine. The load is applied to the weldment of the flat specimen at mid-span until the specimen conforms to a U-shape, or until failure occurs.

ASTM E290 covers bend testing of material for ductility under different boundary conditions. Two of the more common are the guided 3-point and U-shaped bend tests. The bend test is performed by placing a specimen symmetrically on the support fixture that is mounted to the testing machine. The load is applied to the specimen at mid-span until either failure occurs, or until the predefined angle of bend / maximum angle for the fixture or the U-shape is achieved.

After the bending test is completed, the curved surface of the bend is examined for evidence of a crack or surface irregularities to determine if the material has failed.

Please refer to ASTM E290 for more detailed information about the other test setups; guided V-bend; semi-guided bend; free-bend; bend and flatten.

Solutions for ASTM A370, E190 & E290 guided bend test typically include these types of components:

Load Frame Options
MTS offers electromechanical Criterion® and Exceed® universal test systems and dynamic servohydraulic Landmark® test systems that are ideal for performing accurate and repeatable monotonic bend testing of metallic materials per ASTM A370, E190 & E290.

MTS Criterion universal testing systems are engineered to support the needs of advanced Research & Development. MTS Exceed universal testing systems are best suited for Quality Control testing by delivering the reliable performance needed to meet the uptime demands of high-volume production environments.

The MTS Criterion and the MTS Exceed universal testing machines range from tabletop to floor-standing electromechanical models with force ratings of up to 600 kN / 135 kip. Many of the models have dual-zone test spaces to reduce set-up times if you frequently change test requirements.

The MTS Landmark dynamic servohydraulic test system with its superior stiffness and alignment capabilities, is an ideal choice if additional fatigue and fracture testing capabilities are required. Systems are available in highly configurable floor-standing and tabletop models with force ratings from 5 kN / 1 kip to 500 kN / 110 kip.

As an alternative to a new load frame, you can replace outdated controls / hydraulics of existing MTS or another manufacturer’s electromechanical, servohydraulic or custom test systems, including: **Instron®, **Zwick®, **Tinius Olsen™, **SATEC®, **Baldwin® and more with an MTS ReNew™ Upgrade.

**Trademark owned by their respective owners, not affiliated with MTS Systems Corporation.

Extensometry Options

ASTM A370 refers to ASTM E8/E8M for the testing equipment requirements. ASTM E8/E8M requires that extensometers conform to ASTM E83. MTS offers a variety of extensometer types, ranging from clip-on, automatic to non-contacting optical and video extensometers, that meet or exceed requirements for calibration according to ASTM E83 Class B1 and ISO 9513 Class 0.5 standards. Factors like the specimen material, shape and dimension, the requirements for test efficiency and budget need to be considered when choosing the appropriate strain measurement solution.

Other Options

For other options related to this standard, please download the application test method tech note on this page.

Product Solutions For This Application

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