What is the application of tensile testing machine in the metal industry

Source：www.cshuaqiang.com Release date： 2026-04-14

Tensile testing machine is a core equipment used in the metal industry to determine the mechanical properties of materials, control quality, verify processes, support design and research and development. The core is to obtain key indicators such as yield strength, tensile strength, elongation, elastic modulus, and section shrinkage through tensile testing.
1、 Core testing indicators (mandatory for metals)
Yield strength (σ s/Rp): The critical stress at which a material begins to undergo plastic deformation (e.g. HRB400 steel bars ≥ 400MPa).
Tensile strength (σ b/Rm): the greater bearing stress before fracture (such as Q235 steel ≥ 375MPa).
Post fracture elongation (A): plastic deformation ability (the higher the elongation, the better the toughness).
Shrinkage rate (Z): The degree of necking, reflecting plasticity.
Elastic modulus (E): stiffness index (structural deformation resistance).
The specified plastic elongation strength (Rp0.2) is an alternative indicator when there is no obvious yield.
2、 Main application scenarios in the metal industry
1. Acceptance of raw materials upon arrival at the factory
Verify whether steel plates, bars, wires, steel bars, aluminum/copper alloys, etc. comply with national standards (GB/T 228.1), American standards (ASTM E8), ISO 6892.
Reject non-conforming batches to avoid subsequent processing scrap.
2. Quality control in the production process
Rolling/Forging/Stamping: Monitor the impact of cold/hot processing on strength and plasticity.
Heat treatment verification: Whether the performance meets the standards after quenching, tempering, annealing, and tempering.
Welding/joint testing: tensile strength of welds, bolts, rivets, and lap joints to determine weak areas.
Wire/material: breaking force and elongation of steel wire, copper wire, aluminum wire.
3. Architecture and Steel Structures
Yield, tensile, and elongation testing of steel bars (HRB400/500).
Strength testing of steel plates, H-beams, angle steels, bolts, and grid structure nodes.
Steel structure safety assessment and failure analysis.
4. Automobiles and Rail Transit
Body steel plate, wheels, chassis components, transmission shaft, engine connecting rod tension and fatigue.
Lightweight: Optimization of strength and plasticity of high-strength steel, aluminum alloy, and magnesium alloy.
Strength verification of rail vehicle body, bogie, and fasteners.
5. Aerospace and Military Industry
Ultimate performance testing of titanium alloys, aluminum lithium alloys, high-temperature alloys, and special steels.
Static and dynamic fatigue of landing gear, engine blades, and load-bearing structural components.
High temperature/low temperature environmental chambers are used to test the performance under extreme working conditions.
6. Mechanical and equipment manufacturing
Strength and toughness of hydraulic/pneumatic cylinders, gears, bearings, and mold steel.
Pressure vessel, pipeline, flange, valve tensile and explosion verification.
Fasteners (grade 8.8/10.9/12.9) ensure stress and failure torque.
7. Research and development of new materials
Characterization of strength and toughness of high entropy alloys, metal matrix composites, amorphous and nanocrystalline materials.
Research on alloy composition, process optimization, and strength plastic balance.
Stress strain curve, n-value (strain hardening), r-value (anisotropy) analysis.
8. Failure analysis and safety assessment
Tensile retest of fractured parts: Determine whether it is overload, material defects, or process issues.
Sampling inspection of service parts: assessment of residual strength after aging, corrosion, and fatigue.

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