Hi Mr. Lim, no need to sorry, I'm happy to share some details of it, and hopefully it can help other people too without charging any consultation fees ... Let's talk about the steel market in Malaysia. First and foremost, in Malaysia, there are few company/manufacturer that controls the steel market. It's the big four (四大天王) which is Amsteel, Masteel, Alliance Steel and Southern Steel. These four company have sirim cert which means it is BS or can conclude they are following JKR specs. For contractor, we called it (big factory) for BS and CQ is (small factory). As for physically the difference between BS and CQ is the diameter size. Let's said using Y12 BS and Y12 CQ to compare, the size for BS is confirmed will be 12.++mm and for CQ maybe u could get 10.++mm which means u only get Y10 BS size.

The other point is the marking that u can find on the steel. Each company has a different marking. Eg. Alliance steel it will be written, "AS 12 500N". "AS" is company/manufacturer, "12" is the diameter size and "500N" is the grade and strength. Secondly is the BRC. For physically it is the same with the high tensile deformed steel bar which is (Y bar) that I've mentioned just now. The size is slightly different. It has BRC A4-A13 (square mesh), BRC B5-B13(rectangular mesh), BRC C5-C13(long rectangular mesh), BRC DA4-DA13(small square mesh). The alphabet after the letter of BRC represents the shape and the number represents the diameter size.

Last but not least, is ® round steel bar. The (Y) and ® bar many of people are confusing. The (Y) bar is with groove line and the ® is without groove line and it's a smooth rounded shape. So what is the uses of (Y) and ® is (Y) usually is the long straight steel in column or beam and ® is the ring of the (Y). This will be confused but i will attach some drawing to explain it shortly. If u guys experienced in submission to majlis it will have archi and engineer plan, From the plan it will written 6Y12/150cc which means your column or beam should consist of 6 units of Y12 and the ring gap between is 150mm.

So here is my explanation of the steel bar. Pls correct me if I'm wrong. Thanks