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How Stainless Steel Rebar is used in reinforced concrete construction?

How Stainless Steel Rebar is used in reinforced concrete construction

    When it comes to reinforced concrete construction, many companies and contractors prefer stainless steel rebars instead of conventional carbon steel rebars so that the service life of the structure is extended and lifecycle costs such as repairs and maintenance can be minimized.Stainless steel has a unique ability to efficiently resist corrosion caused due to chloride or other factors. This helps in increased durability of concrete. For this reason, stainless steel rebars are extensively used in structures like highway bridges, ramps and barrier walls, parking garages, marine facilities, tunnels, building foundations, and restorations. They are also an exceptional choice for the infrastructure of chemical and other process plants where corrosion resistance is extremely necessary.The strength and durability of the structure are important to ensure that it stays erect and unharmed during a seismic disturbance. Due to their excellent properties like high tensile strength, ductility, toughness, and fatigue resistance, stainless steel bars are a leading preference to build bridges and other structures in areas of high seismicity.For applications where the magnetic properties of basic carbon steel are not favorable, stainless steel rebars are the best alternative. As they have low magnetic permeability, they do not form a magnetic field and can be included where ambient magnetic fields from ferrous metals may damage sensitive machinery or processes.Since stainless steel rebar is high strength steel, the amount of concrete cover used in a project to prevent corrosion and disintegration can be greatly reduced. These days, many engineers and architects design various structures in accordance with the use of stainless steel bars which result in considerable saving in cost and material. Moreover, with stainless steel rebars, additional protection of belts and suspenders in bridges is unnecessary since this high –performance system is more than sufficient to provide the required protection. They also lead to less disruption in service operations since the need for repair or maintenance is negligible. The length of a stainless steel bar is an important factor when it is used in concrete reinforcement. In this process, the steel bars should be connected to each other to gain maximum length. This results in the overlapping of bars that reduces effective bar length. It also increases costs and degrades the strength of the structure. With long bars, the percentage of bar lost to overlapping is smaller and they need less time and effort to join as compared to several smaller bars. Moreover, they also save weight and space without any loss of strength.At Sunflag Steel, stainless steel rebars are available in different sizes and lengths so that you can use them in different projects and structures. These superior quality bars are characterized by all the mechanical properties that will make them last for a lifetime!

    Corrosion Resistance

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    ECT For Bars

    Acceptance Criteria

    Minimum defect depth and length (FBH)

    • 0.7 mm FBH from 15—60 mm dia
    • 1.2 mm FBH above 60 dia

     
    Minimum defect depth and length (SDH)

    • 0.5 mm x 10 mm {from 15—120 mm dia)
    • 0.3 mm SDH sensitivity can deduced by
      extrapolation depending on material SNR.

    Phased Array Auto Ultrasonic Testing Salient Features

    Phased Array Technology

    Phased Array testing is a specialized type of ultrasonic testing that uses sophisticated multi- element array transducers and powerful instrumentation/software to steer ultrasonic beams through the test piece and map returning echoes.

    No rotating movement, only electronic scanning is done:

    • Depth focalization for bar volume inspection (LW)
    • Electronic steering for bar surface inspection (SW)

    Quality Highlights:

    Capacity — 15 to 120 mm dia. Full bar volume inspection

    Sunflag R&D Lab Is Equipped With Following State Of The Art Equipment

    • Scanning Electron Microscope with Energy Dispersive X—Ray Spectroscope (SEM—EDS) of Make — JOEL
    • Immersion Ultrasonic Testing Facility of Make — Olympus / Blue Star
    • Optical Microscope with Automatic Multiaxis stage Movement and Image Analysis software
    • Micro—hardness tester
    • Ferritometer
    • NABL Certified Testing Lab
    • R & D Centre Recognised DSIR Government of India

    Scanning Electron Microscope With Eds

    • Key Function

    – Microstructure analysis
    – Quantitative 8L qualitative Analysis of Inclusions

    • Failure Analysis
    • Fractography
    • Inclusion with quantitative elemental analysis

    Salient Features

    Dimension of samples that can be tested :

    – Round Bars :

    • Size 15-120 mm die.
    • Length 800mm
    • Round Corner Square Bars:
    • Size 60420 mm

    UST Prob: 10 MHz — 6mm As Per Sep 1927