Reinforcement Bars & Wires Testing
(Rebar Tensile & Bend Test)

Comprehensive mechanical testing of reinforcement steel bars and wires including tensile strength, yield strength, elongation, bend and rebend tests — verifying compliance with IS 1786 for structural safety.

Overview

What is the Reinforcement Bars & Wires Testing?

Reinforcement Bar Testing covers all mandatory mechanical tests required to verify that TMT (Thermo-Mechanically Treated) reinforcement steel bars meet the requirements of IS 1786:2008. Key properties include yield strength (0.2% proof stress), ultimate tensile strength, percentage elongation, bend test and rebend test — all critical for structural ductility and seismic performance.

At Global Lab, rebar testing is conducted in our NABL-accredited Universal Testing Machine (UTM) laboratory. Every test includes a complete stress-strain curve, clear pass/fail against IS 1786 grade requirements (Fe 415, Fe 415D, Fe 500, Fe 500D, Fe 550, Fe 550D, Fe 600) and a legally valid NABL test certificate.

Complete IS 1786 Test Suite

Tensile, yield, elongation, bend and rebend tests per IS 1786:2008.

All Fe Grades Covered

Fe 415, 415D, 500, 500D, 550, 550D and Fe 600 grades tested.

Full Stress-Strain Curve

Complete load-extension and stress-strain diagram plotted for each test.

Bend & Rebend Test

Ductility assessed by 180° bend and 157.5° rebend tests per IS 1599.

NABL Certified Reports

All results on NABL-accredited letterhead with IS 1786 compliance statement.

Seismic Grade (D) Verification

IS 1786 'D' grade requirements (Agt ≥5%, UTS/YS ≥1.15) verified for seismic zones.

Test in Action

Reinforcement Bars & Wires Testing — Site Images

Rebar Tensile Test in UTM

Stress-Strain Curve Plotted

Bend Test at Specified Mandrel Diameter

Test Procedure

How the Reinforcement Bars & Wires Testing is Conducted

1

Sample Preparation

Rebar samples cut to specified gauge length per IS 1608. Gauge length marked. Weight per metre measured.
2

Tensile Test Setup

Sample gripped in NABL-calibrated UTM. Extensometer attached for accurate strain measurement.
3

Tensile Test Execution

Load applied at 2–20 MPa/s. Yield point/0.2% proof stress, UTS and % elongation recorded.
4

Bend & Rebend Test

Bend test at specified mandrel diameter per IS 1786 Table 5. Rebend test at 100°C re-straightening per IS 1786.
5

IS 1786 Compliance Report

All results compared against IS 1786 grade requirements. NABL certificate with stress-strain curve issued within 3 days.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
IS 1786:2008	High Strength Deformed Steel Bars and Wires for Concrete Reinforcement	Rebar Specification	Indian Standard
IS 1608	Method for Tensile Testing of Steel Products	Tensile Test	Indian Standard
IS 1599	Method for Bend Test for Steel Bar and Section	Bend Test	Indian Standard
ASTM A615	Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement	Rebar Standard	ASTM

Applications

Where is the CAPO Test Used?

Incoming quality control of TMT rebar at construction sites

Acceptance testing of rebar for NHAI, Railways and government infrastructure

Third-party verification for rebar procurement disputes

Quality audit of rebar from multiple suppliers for large projects

Seismic zone (D grade) rebar compliance verification per IS 13920

Research and comparison testing of rebar from different mills

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid IS 1786 compliance certificates accepted by all structural engineers.

Calibrated 1000kN UTMNABL-calibrated Universal Testing Machine for accurate force measurement.

All Rebar Diameters8mm to 40mm TMT bars tested across all Fe grades.

Autovity Digital ReportsAccess stress-strain curves and test certificates digitally.

Fast 3-Day TurnaroundComplete IS 1786 test suite reported within 3 days.

Seismic Grade ExpertiseSpecialists in IS 13920 and IS 1786 D-grade seismic rebar verification.

Reinforcement Bars & Wires Testing(Rebar Tensile & Bend Test)