MaTestLab > Test Standards > ASTM E139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
Last updated 26th February 2025
ASTM E139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
ASTM E139 test procedures involve the determination of the amount of deformation as a function of time (creep test) and the measurement of the time for fracture to occur when sufficient force is present (rupture test) for materials subjected to constant tensile stresses at constant temperature. When properly understood, rupture tests provide a measure of a material's ultimate load-carrying capacity over time. Creep tests assess the load-carrying capacity for limited deformations. The two tests are complementary in determining a material's load-carrying capabilities. When selecting materials and developing parts for use at elevated temperatures, the type of test data used will be determined by the load-carrying ability criterion, which better characterizes the material's service utility.
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E139 Introduction
ASTM E139 is a set of standard test methods used for conducting creep, creep-rupture, and stress-rupture tests on metallic materials. Rupture tests determine a material’s ultimate load-carrying capacity as a function of time. Creep tests are used to assess the load-carrying capacity of constrained deformations. The two tests complement each other in determining a material’s load-carrying capacity. The type of test data used to select materials and design parts for service at elevated temperatures will depend on the load-carrying ability criterion.
To assure the dependability and durability of metallic materials under high temperatures and stresses, thereby improving safety and efficiency in a variety of industrial applications. ASTM E139 is essential for researchers, engineers, and quality assurance specialists when developing and assessing metallic materials. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out E139 tests for our clients.
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E139 Standard Test Method
Load or Stress Application
The specimen is subjected to a steady load or stress that is applied and managed precisely throughout the test. Depending on the precise objectives of the ASTM E139 test, this load or stress can be modified.
Deformation and Rupture Monitoring
During the E139 test, the deformation of the specimen, including creep and elongation, is continuously monitored. For stress-rupture testing, the time to rupture is recorded, whereas creep deformation is monitored over a specific period.
Data Analysis
The data from the ASTM E139 test is analyzed to determine the material’s creep characteristics, such as creep rate, stress-rupture life, and rupture strength, to assess its long-term performance under sustained loading.
E139 Equipment and Sample Preparation
Specimen Details
ASTM E139 specimen is a metallic material, such as a particular metal or alloy, that can be examined using heat treatment and a test environment.
Specimen dimensions
The geometry of the test specimen varies depending on the material and test requirements. Common specimen geometries include cylindrical, rectangular, or dog-bone-shaped.
Specimen preparation
The specimen is prepared by machining it from a bulk sample of the metallic material. The surface finish is carefully prepared to ensure smoothness and remove imperfections. Strain measurement may be required if strain gauges or extensometers are attached.
E139 Test Resultsand Interpretation
The ASTM E139 standard provides guidelines and procedures for conducting tests on metallic materials to determine critical parameters such as creep deformation, creep rate, stress-rupture life, rupture strength, and temperature effects. These parameters help to assess the material’s long-term strength and reliability.
Other Tests Related to E139
ASTM E139 is related to standards such as ASTM E8 for tension testing of metallic materials and ASTM E21 for elevated temperature tension tests of metallic materials.
Use of E139 in Various Industries
The standard is relevant in industries including aerospace, automotive, and power generation that assesses metallic materials under high temperature conditions, such as resistance to creep in turbine blades, durability of an engine, or the ability to make a boiler tube and pressure vessel safe.
Materials Commonly Tested with E139
The standard is for testing high-performance alloys and metals, such as stainless steels, nickel-based superalloys, and titaniums – being high-temperature resistant types, and that are often used in critical components subjected to prolonged stress.
Common Challenges and Troubleshooting in E139
The significant challenges in testing are having stable temperature and stress conditions, starting with equipment calibration, environmental condition monitoring, troubleshooting, and advanced data acquisition systems, all to ensure minimal fluctuation in results.
Safety and Best Practices in E139 Testing
The test needs extended exposure at high temperatures and loads, and thus the apparatus must regularly be inspected, thermal barriers be applied, and the body protection gear shall be heat-resistant. These help minimize the chances of mechanical failure, ensure efficient ventilation, and protect from injury as a result of unintended exposure to hot materials or equipment.
Importance of E139
The significance of the test is to realize the material under conditions of high stress, which allows engineers to predict and predict the whole life cycles of any component, optimize the selection of materials, and thereby improve structure reliability in aerospace and power plant industries, etc.
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FAQ's
Where can I get the astm e139 tested?
You can share your astm e139 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e139 test to various testing techniques.
How much do I need to pay for the astm e139 test?
Please contact us for a detailed quote for your astm e139 testing needs. Cost incurred to carry out different astm e139 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm e139?
The required number of samples or specimens should comply with the procedure given in the astm e139 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm e139 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm e139 test?
The turnaround time for astm e139 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm e139 tested?
You can share your astm e139 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e139 test to various testing techniques.
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