Testing of metal, rebar and welded joints

Rebar testing

• tensile testing
• determination of yield strength
• determination of ultimate tensile strength
• determination of relative elongation
• inspection of geometric parameters

Our own tensile testing machines

MATTEST performs rebar testing on the RM-A-1000 and RM-AP-1000 tensile machines manufactured by M-Instrument.

The equipment applies a controlled tensile load, records the specimen behaviour up to failure, and determines its strength and deformation characteristics. Owning two dedicated machines confirms the actual technical capacity of the laboratory and enables large test volumes without dependence on external equipment.

Inspection of welded joints and steel structures

Visual and dimensional inspection

Verification of the shape and dimensions of the welded joint, surface condition and visible defects.

Ultrasonic testing

Detection of internal discontinuities: cracks, lack of fusion, porosity and inclusions..

Radiographic testing

Imaging of the internal structure of the welded joint..

Penetrant testing

Detection of discontinuities that break the inspected surface.

Ultrasonic thickness gauging

Determination of actual metal thickness and detection of wall thinning.

Protective coating inspection

Coating thickness measurement and adhesion assessment.

What we inspect

• welded joints of steel structures
• columns, beams and load-bearing elements
• pipelines
• tanks and equipment
• rebar and reinforcement cages
• sheet and section-rolled steel
• paint and protective coatings

Deliverables for the client

Depending on the method, MATTEST issues an inspection report or a technical conclusion stating:

• the object and the inspected joint
• the applied method and equipment
• the defects detected and their location
• evaluation results against project requirements
• photographs or radiographic images
• conclusions within the limits of the applied method

Applicable standards

In the published accreditation scopes of Uzbek laboratories the following documents are used for this group of works:

• O'z DSt EN ISO 6892-1:2020 — tensile testing of rolled metal products
• GOST 12004-81 — tensile testing of reinforcing steel
• O'z MSt ISO 17637-2023 — visual inspection of welded joints
• O'z DSt ISO 16809-2020 — ultrasonic thickness gauging
• GOST R 55724-2013 — ultrasonic testing of welded joints
• GOST 7512-82 — radiographic testing
• GOST 18442-80 — penetrant testing
• ISO 6892, ASTM E8, ISO 17636, ASTM E1032, ISO 3452 — international counterparts applied at project request

On the individual method page and in the inspection program, only the documents relevant to the object, material and applied method are listed.