Steel plain round bars

Diameters ranging from 6 - 25 mm in length 10 meters for the construction of small and medium-sized commercial buildings such as residential street floor factory building or structure in medium-sized pole. Production standards มอก. 20 – 2543

Chemical composition(%)

Grade	Carbon	Phosphorus	Sulphur
SR 24	0.280	0.058	0.058

Nominal sizes and unit weight

Designation	Designation diameter (mm)	Unit weight (kg/m)	Cross sectional area(cm2)
RB 6	6	0.222	0.283
RB 9	9	0.499	0.636
RB 12	12	0.888	1.131
RB 15	15	1.387	1.767
RB 19	19	2.226	2.835
RB 25	25	3.853	4.909

Physical properties

Grade		SR 24
Yield strenght not less than (kg/mm2)		24
Tensile strenght not less than (kg/mm2)		39
Elongation not less than (%)		21
Cut cold bend test.	Bending Angle	180°
	Diameter of mandrel	1.5 times of diameter

Steel deformed bars

Diameter from 10 to 40 mm in length 10.12 meters suitable for medium-sized construction. And a large common, such as bridges, dams, bridges and high.

Production standards มอก.24 – 2548 Grade SD 30,SD 40,SD 50

 

Chemical composition(%)

Grade	Carbon	Manganese	Phosphorus	Sulphur	Carbon+Manganese 6
SD 30	0.30	-	0.06	0.06	0.50
SD 40		1.85	0.06	0.06	0.55
SD 50		1.85	0.06	0.06	0.60

Nominal sizes and unit weight

Designation	Designation diameter (mm)	Unit weight (kg/m)	Cross sectional area (cm2)
DB 10	10	0.616	0.78
DB 12	12	0.888	1.13
DB 16	16	1.578	2.01
DB 20	20	2.466	3.14
DB 25	25	3.853	4.91
DB 28	28	4.834	6.16
DB 32	32	6.313	8.04

Physical properties

Grade		SD 30	SD 40	SD 50
Yield strenght not less than (kg/mm2)		30	40	50
Tensile strenght not less than (kg/mm2)		49	57	63
Elongation not less than (%)		17	15	13
Cut cold bend test.	Bending Angle	180°	180°	90°
	Diameter of mandrel	3 and 4 times the diameter specified.	5 times the diameter specified.	5 and 6 times the diameter specified.