ASTM E8 & ASTM E8M – Tensile Testing of Metallic Materials

Read more about ASTM E8 to understand how tensile testing of metallic materials is performed.

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ASTM E8 & ASTM E8M – Tensile Testing of Metallic Materials

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Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

ASTM E8 / ASTM E8M is a standardized test method for the determination of the tensile properties of metals under uniaxial tension. This test method is applicable to metallic products in the form of plates, bars, rods, wires, and structural shapes.

This test method provides data on the yield strength, ultimate tensile strength, elongation, reduction of area, and modulus of elasticity of a material. A standard specimen is subjected to a universal testing machine until it breaks, and the stress-strain curve is used for material verification and design.

Scope, Applications, and Benefits

Scope

ASTM E8 / ASTM E8M defines the standard procedure for tensile testing of metallic materials to evaluate their mechanical properties under uniaxial loading. It establishes uniform requirements for specimen preparation, test setup, and result calculation to ensure reliable and comparable data.

Applicable to ferrous and non-ferrous metals.
Covers round and flat specimens.
Conducted primarily at room temperature.
Determines strength and ductility properties

Applications

Material certification.
Manufacturing quality control.
Structural design data.
Research and development.
Compliance verification.

Benefits

Standardized testing method.
Reliable and repeatable results.
Enables material comparison.
Supports safe engineering design.

Test Process

Specimen Preparation

Machine standard metallic specimen to specified dimensions and mark gauge length.

Mounting & Alignment

Place the specimen in the grips of the universal testing machine, ensuring proper axial alignment.

Tensile Loading

Apply tensile load at a specified rate until fracture while recording load and elongation.

Data Analysis & Reporting

Calculate yield strength, tensile strength, elongation, and other properties

Technical Specifications

Parameter	Details
Material Type	Metallic materials
Specimen Types	Round and flat specimens
Specimen Diameter	Commonly 12.5 mm
Gauge Length	Typically 4D (round) or 50 mm / 2 in (flat).
Gripping Method	Wedge grips or hydraulic grips
Testing Machine	Calibrated Universal Testing Machine (UTM)
Loading Mode	Uniaxial tensile loading
Strain Measurement	Extensometer
Data Output	Stress–strain curve and fracture characteristics

Instrumentation Used for Testing

Universal Testing Machine (UTM)
Load Cell
Extensometer
Wedge or Hydraulic Grips
Crosshead Displacement Indicator
Data Acquisition System (DAQ)
Alignment Fixtures
Calibrated Measuring Tools

Results and Deliverables

Results and Deliverables Content

Yield Strength
Ultimate Tensile Strength (UTS)
Elongation
Reduction of Area
Modulus of Elasticity
Stress–Strain Curve
Fracture Location and Mode

Why Choose Infinita Lab for ASTM E8 & ASTM E8M?

Infinita Lab is a trusted USA-based testing laboratory offering ASTM E8 & ASTM E8M testing services across an extensive network of accredited facilities across the USA.

Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.

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 E8 and E8M employ the same procedure for tensile testing. The only difference is that E8 uses US customary units, whereas E8M provides results in SI metric units without affecting the execution of the test.

ASTM E8 tests the mechanical strength of metals. It ensures that metals possess the required strength when subjected to a tensile load. This, in turn, prevents metals from becoming brittle.

Yield strength is the measure of the stress at which the permanent deformation of the material starts. Tensile strength is the maximum stress that a metal can withstand before necking and breaking.

ASTM E8 specifies that tests can be conducted on flat dog bone specimens, round bars, and tubing. Specimens can be extracted from either material or finished products, as long as they satisfy the specified dimensions and surface finish requirements.

ASTM E8/E8M ensures that the metals used are of specified mechanical strength. It prevents the use of materials that are brittle or underperforming, which may lead to a failure in the structure or the rejection of the product.