How to read Mill Test Certificates
A mill test certificate (MTC) is the primary document linking a batch of reinforcement steel to tested mechanical properties and the manufacturing standard. Every serious procurement should retain MTCs for site records and structural sign-off.
Frequently asked questions
Who issues the MTC?
The manufacturer issues the MTC per production heat or batch. RS Steel attaches MTCs on request for mill-direct orders. Ask at Contact or through your distributor.
Is an MTC the same as a test report?
An MTC certifies a specific production batch. Independent test reports (e.g. university or third-party) validate the product line. RS Steel publishes certificates at Certifications.
What yield strength should RB500 show?
Characteristic yield strength ≥ 500 MPa per SLS 375:2009 for RB500 grade. Context: What is RB500?.
How long should I keep MTCs?
Retain them for the project lifecycle — typically with QA files until handover. They support audits, disputes, and as-built records.
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.