Establishes tension testing of metallic materials at elevated temperature to determine yield strength, tensile strength, and ductility indicators, serving as the ASTM counterpart to ISO 6892-2 in many North American specifications.
Standard test methods for elevated temperature tension tests of metallic materials
Scope: Establishes tension testing of metallic materials at elevated temperature to determine yield strength, tensile strength, and ductility indicators, serving as the ASTM counterpart to ISO 6892-2 in many North American specifications.
Test method
Heated specimens are pulled while measuring force and extension; procedures define crosshead or strain-rate limits before and through yield (for example ±0.005 in./in./min near yield), thermocouple placement, and reporting in customary ASTM formats.
Specimen requirements
Specimen dimensions and tolerances follow ASTM practice (inch and SI variants); gauge-section temperature mapping and allowable gradients are specified. High-temperature furnaces, alignment, and extensometry are required; grip heating and soak times must be controlled.
ASTM E21 covers the same elevated-temperature tensile problem as ISO 6892-2 but follows ASTM International conventions for specimen geometry, thermocouple layout, and speed control wording. Projects that cite E21 expect reports compatible with other ASTM metals methods such as ASTM E8/E8M.
Key differences from ISO 6892-2 include explicit strain-rate limits approaching yield, inch-pound reporting options, and ASTM tolerance tables for specimen preparation. Method A/B naming in ISO is replaced by ASTM procedural clauses tied to crosshead or strain control.
Hardware mirrors ISO elevated-temperature setups: a universal testing machine, furnace, temperature control, and high-temperature extensometer. Vector integrates these elements on frames with environmental chambers so elevated-temperature programmes remain traceable alongside room-temperature ISO 6892-1 workflows.