Controlled surface preparation is the first step towards reliable mechanical measurements directly on the component.
Application · In-situ testing · Component-level data
On-site Mechanical Testing for installed components
Assess local mechanical properties on large, installed or difficult-to-sample components with a
defined feasibility review, documented test locations and controlled boundary conditions.
On-site testing moves the measurement from the laboratory to the component. Instead of removing a
standard specimen from a pipeline, steel structure or large plant item, an accessible local area is
prepared and tested under controlled conditions at its actual location.
This route is valuable where sampling could impair function, the asset cannot be transported or
local differences matter more than a bulk average. Testawell combines location selection with a
documented measurement and evaluation strategy.
Local properties instead of broad material assumptions
For suitable metallic materials, the i3D® indentation
method can provide local plastic stress-strain response and indentation-based comparative values for
proof strength and ultimate tensile strength. Multiple points reveal differences across parent
material, heat-affected zones, repairs or unidentified component regions.
comparative proof strength RIp0.2 and tensile strength RIm
plastic flow curves for suitable materials and evaluation models
profiles, grids and scatter across component or weld zones
photographically and geometrically documented test positions
From the component question to documented results
01
Review feasibility
Material, wall thickness, curvature, access, temperature, vibration and acceptable surface intervention are assessed.
02
Define test locations
Reference areas, local indications, weld regions and repeat measurements are captured in a traceable test plan.
03
Test on site
The surface is prepared locally, the equipment is positioned securely and the boundary conditions of each measurement are recorded.
04
Interpret the data
Results, scatter, validity limits and any recommended validation steps are brought together in a project-specific report.
Where on-site testing adds value
structural steel, bridge components and load-bearing structures
pipelines, pressure equipment and large plant components
welds, heat-affected zones and local repair regions
large cast, forged and additively manufactured components
failure analysis and material verification where no tensile sample is available
Which boundary conditions matter?
sufficient local thickness, mass and component stiffness
suitable curvature and space for equipment and surface preparation
controllable vibration, temperature and environmental conditions
a known or reasonably constrained material family
documented residual stress, gradients and surface coatings
Portable indentation, portable hardness or a tensile specimen?
The appropriate method depends on the required conclusion and the intervention the component can accept.
Decision criterion
Portable indentation
Portable hardness
Extracted tensile specimen
Primary output
Local plastic response and comparative strength values
Local hardness value for the selected method
Global tensile properties including fracture behaviour
Spatial resolution
High; profiles and local grids are possible
High; depends on load and indent size
Average across gauge length and specimen section
Component intervention
Local preparation and a remaining indent
Local preparation and a small indent
Material removal and specimen manufacture
Key limitation
Model, material and boundary-condition suitability must be reviewed
Strength conversion requires a robust correlation
Small local zones may be averaged by specimen size
Related applications and methods
Method
Indentation plastometry
From controlled loading and 3D topography to inverse evaluation of local properties.
Local zone
Welds & HAZ
Assess parent metal, weld and heat-affected zone with a suitable sequence of points.
Profile
Gradients & transitions
Track local changes across repairs, coatings and thermally affected zones.
Evaluation
FEM material input
Prepare local material response for simulation and document the limits transparently.
Frequently asked questions about on-site mechanical testing
What does on-site mechanical testing mean?
On-site mechanical testing brings the measurement to an installed, large or otherwise difficult-to-sample component. Test location, surface condition, access and environmental conditions become part of the test plan.
Which properties can portable indentation testing provide?
For suitable metallic materials, it can provide local plastic flow-curve data and indentation-based comparative values for proof strength and ultimate tensile strength. Quantitative suitability is reviewed against the material, geometry and test conditions before the campaign.
Is on-site indentation testing non-destructive?
A local indent remains in the prepared surface. The method should therefore be described as minimally invasive or low-damage rather than universally non-destructive. Acceptance of the remaining mark must be assessed for the specific component.
Which components are suitable for on-site testing?
Typical candidates include structural steel, pipelines, pressure equipment, large castings and forgings, weld and repair zones, and components from which a tensile specimen cannot be removed. Access, local stiffness and a surface that can be prepared are essential.
Does on-site mechanical testing replace a tensile test?
Not in every case. Local testing can provide valuable data where specimen removal is impractical or unacceptable. Standards-based global tensile values, fracture elongation, anisotropy or behaviour to fracture may still require tensile or specialist testing.
