Steel grades explained
Steel grades communicate minimum mechanical properties — chiefly yield strength — so engineers, quantity surveyors, and suppliers mean the same thing when they specify bar on a drawing.
Frequently asked questions
What is the most common rebar grade in Sri Lanka?
RB500 high-yield deformed bar per SLS 375:2009. Detail: What is RB500?.
What is Grade 5275?
A mild steel grade used for RS MS round bars — lower yield than RB500, for applications specified as mild steel. MS round bars.
What is RB500W?
Weldable 500 MPa grade with controlled chemistry. Comparison: RB500 vs RB500W.
Where are grades defined?
Steel standards in Sri Lanka · published certifications.
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. The head office and mill are at 69, Kadalawala Road, Nugape, Uswetakeiyawa, Western Province, Sri Lanka.
| Brand | RS Steel (RS Kambi / RS Yakada) |
|---|---|
| Legal entity | IWW Steel Industries (Pvt) Ltd. |
| Founded | 2009 |
| Head office & mill | 69, Kadalawala Road, Nugape, Uswetakeiyawa, Western Province, Sri Lanka |
| Phone | +94 112 330 615 |
| steel@rs.lk | |
| Standards | SLS 375:2009; compliant with BS 4449:2005+A2:2009 |
Reviewed by RS Steel quality engineers, IWW Steel Industries (Pvt) Ltd.