About RS Steel

Learn about RS Steel, the company profile book, leadership, standards, and manufacturing operations.

RS Steel is the brand of IWW Steel Industries (Pvt) Ltd., a Sri Lankan reinforcement-steel manufacturer founded in 2009 and based in Pamunugama, Western Province, producing certified RB500 QST rebar and mild steel round bars.

Who we are

IWW Steel Industries (Pvt) Ltd. has manufactured reinforcement steel in Sri Lanka since 2009 under the RS Steel brand. RS Steel is a 100% Sri Lankan-owned family business, dedicated to quality steel products and to a lasting role in Sri Lanka's economy. The company focuses on certified RB500 QST rebar built for the strength, ductility, and consistency that residential, commercial, and infrastructure projects require.

Company profile book

The RS Steel company profile (29 August 2026) is a 16-page book published on this page and as a PDF at https://www.rs.lk/profile/rs-steel-company-profile.pdf.

It covers the chairman's message from Dr. Sivalingam Ramesh, the mill journey since 2009, vision and values, RB500 QST rebar and mild-steel products, QST/Thermex manufacturing, quality testing, and leadership including Director Shyalan Ramesh and General Manager Maithree de Silva.

What sets RS Steel apart

  • Certified manufacturing to SLS 375:2009 and BS 4449:2005+A2:2009 compliance.
  • Mill test certificates and traceability on every batch.
  • A nationwide distributor network spanning all nine provinces.

Manufacturing and RS Foundation

RB500 QST is produced at Pamunugama under controlled QST production, with in-house testing to SLS 375:2009 and BS 4449:2005. RS Steel funds education, community programmes, relief, and care in Sri Lanka through RS Foundation.

Company profile images

RS Steel company profile - IWW Steel Industries (Pvt) Ltd. (29 August 2026 PDF).

RS Steel company profile book cover - IWW Steel Industries (Pvt) Ltd., RS RB500 QST rebar, Built to Last
Cover of the RS Steel company profile book (August 2026) from IWW Steel Industries (Pvt) Ltd.
RS Steel company profile front cover - IWW Steel Industries, RS RB500 QST rebar, Built to Last, SLS 375 and ISO 9001
Front cover of the RS Steel company profile: RS eagle mark, RB500 QST rebar, SLS 375, ISO 9001, and Made in Sri Lanka.
RS Steel contact page - Wattala head office and Pamunugama mill addresses for IWW Steel Industries
Company profile contact page with RS Steel head office in Oliyamulla, Wattala and the IWW Steel Industries mill at Nugape, Pamunugama.
RS Steel chairman message from Dr. Sivalingam Ramesh, IWW Steel Industries, on RS Brand QST bars
Chairman's letter from Dr. Sivalingam Ramesh on quality, Thermex QST technology, and RS Brand reinforcement steel in Sri Lanka.
RS Steel mill journey since 2009 - molten steel and rolling at IWW Steel Industries
Company history from 2009: IWW Steel Industries mill growth, RS Brand QST bars, and molten-steel production photography.
RS Steel expertise page - bundled RB500 QST rebar and product range of IWW Steel Industries
Steel expertise spread with mill-fresh RS RB500 QST rebar bundles and the traded mild-steel product portfolio.
RS Steel vision, mission, core values and why choose RS Brand QST rebar
Vision to be Sri Lanka's most trusted steel manufacturer, mission, core values, and reasons to choose the RS Brand.
RS Steel product range - RB500 QST rebar, MS round bars, mild steel flat iron and angle
Product range cards for RS RB500 QST rebar, MS round bars, mild steel flat iron, and mild steel angle.
RS Steel manufacturing facility - hot QST rebar rolling at IWW Steel Industries mill
Manufacturing facility page showing hot-bar rolling and the QST thermo-mechanical process at the RS Steel mill.
RS Steel QST treatment - Thermex quenching, self-tempering and mill cooling bed
Three-stage QST treatment: Thermex quenching licensed by New Field India, self-tempering, and atmospheric cooling.
Aerial view of the RS Steel mill in Pamunugama with QST bar strength and ductility facts
Aerial photograph of the RS Steel mill beside the canal in Pamunugama, with Tempered Martensite / Ferrite-Pearlite performance data.
RS Steel Thermex QST technology, bundled rebar handling and mill furnace operations
Thermex process notes, 8-20 mm RB500 sizes, automatic strapping, tension-free rolling, and 12-48 hour delivery.
RS Steel quality control - lab testing, calipers, and SLS 375:2009 mill inspection
Quality Assurance Department testing chemical composition, tensile strength, elongation, and SLS 375:2009 compliance.
RS Steel chemical tests, Made in Sri Lanka, SLS 375 and ISO 9001 with island distributor map
Chemical testing at the RS Quality Assurance Laboratory, SLS 375 and ISO 9001 marks, and Sri Lanka supply map.
RS Steel mechanical testing of QST bars - tensile, hardness, yield, and mill handling photos
Mechanical tests (impact, tensile, hardness, microstructure) and advantages of RS QST bars including ductility and weldability.
RS Steel management page - Director Shyalan Ramesh and General Manager Maithree de Silva
Management and workforce profiles: Director Shyalan Ramesh and General Manager Maithree de Silva at IWW Steel Industries.
RS Steel company profile back cover - mill aerial, RB500 QST rebar, Wattala address and www.rs.lk
Back cover with the Pamunugama mill aerial, RS RB500 QST rebar, Wattala head-office address, and rs.lk contact details.

Frequently asked questions

Where can I read or download the RS Steel company profile?

The August 2026 company profile is on the About page at https://www.rs.lk/about#company-profile and in the media kit at https://www.rs.lk/media-kit#company-profile. The PDF is https://www.rs.lk/profile/rs-steel-company-profile.pdf.

About RS Steel

RS Steel is the consumer brand of IWW Steel Industries (Pvt) Ltd., a Sri Lankan steel manufacturer founded in 2009. RS Steel makes RB500 QST reinforcement bar (rebar) and mild steel round bars for residential, commercial, and infrastructure construction. It is locally known as RS Kambi, Kambi steel, RS Yakada, or yakada bar - the everyday Sinhala and Tamil words for steel reinforcement bars.

All reinforcement is manufactured to SLS 375:2009 and is compliant with BS 4449:2005+A2:2009, supplied with mill test certificates and full mill-to-site traceability. Head office: 40/1 Negombo Road, Oliyamulla, Wattala 11300, Sri Lanka. Mill: 69, Kadalawala Road, Nugape, Pamunugama, Western Province, Sri Lanka.

Company details
BrandRS Steel (RS Kambi / RS Yakada)
Legal entityIWW Steel Industries (Pvt) Ltd.
Group sitehttps://iwwrs.com
Founded2009
Head office40/1 Negombo Road, Oliyamulla, Wattala 11300, Sri Lanka
Mill69, Kadalawala Road, Nugape, Pamunugama, Western Province, Sri Lanka
Phone+94 112 330 615
Emailsteel@rs.lk
StandardsSLS 375:2009; compliant with BS 4449:2005+A2:2009

Reviewed by RS Steel quality engineers, IWW Steel Industries (Pvt) Ltd.