Specifies axial tensile testing of metallic materials at temperatures above ambient (typically from about 35 °C to 1000 °C or higher) to determine tensile strength, proof strength, elongation, and reduction of area under controlled thermal conditions.
ISO 6892-2
Revision: 2018
Material testing
Metallic materials — Tensile testing — Method of test at elevated temperature
Specifies axial tensile testing of metallic materials at temperatures above ambient (typically from about 35 °C to 1000 °C or higher) to determine tensile strength, proof strength, elongation, and reduction of area under controlled thermal conditions.
Test method
A heated specimen is elongated while force and extension are recorded; strain-rate Method A (preferred for repeatability) or stress-rate Method B may be used, analogous to ISO 6892-1 but with strict temperature uniformity requirements throughout the gauge section.
Specimen requirements
Specimen geometry follows ISO 6892-1 families where applicable; thermocouple placement and allowable temperature gradients in the gauge length are defined. Gripping and alignment must limit bending; high-temperature extensometry (in-furnace or side-entry) is required for modulus and yield reporting.
Compatible equipment
ISO 6892-2 extends the room-temperature framework of ISO 6892-1 to elevated-temperature qualification. Laboratories use it when material specifications require proof of strength and ductility in hot service environments—for example power plant steels, aerospace alloys, and high-temperature fasteners.
Temperature control is the critical parameter: fluctuations across the gauge length must stay within narrow limits for the entire test. Vector universal testing machines paired with environmental chambers integrate furnace zoning, control loops, and high-temperature extensometers so strain-rate control (Method A) remains traceable.
Typical hardware includes a tensile frame, multi-zone furnace, temperature controller, and extensometry rated for the test window. For North American contracts that reference ASTM instead of ISO, see ASTM E21, which addresses the same elevated-temperature tensile problem with ASTM reporting conventions.