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STEEL DEFORMED BARS : เหล็กเส้นข้ออ้อย
According to TIS 24-2536 grades SD30, SD40 with the standard length of 10 and 12 M.
Equivalent to: ASTM A615/A 615M-96b, BS4449 : 1997, JIS G3112 (1987), AS 1303-1991, AS-NZS 4671:2001
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| CHEMICAL COMPOSITION (%) |
| Grade |
Carbon |
Manganese |
Phosphorus |
Sulphur |
 |
| SD30 |
0.30 |
- |
0.06 |
0.06 |
0.50 |
| SD40 |
- |
1.85 |
0.06 |
0.06 |
0.55 |
| PHYSICAL PROPERTIES |
| Grade |
yield strengthnot less than
 |
Tensile strengthnot less than
|
Elongationnot less than (%) |
Cold Bend Test |
| Bending Angle |
Diameter of Mandrel |
| SD30 |
30 |
49 |
17 |
 |
3,4 times |
| |
|
|
|
|
of diameter |
| SD40 |
40 |
57 |
15 |
|
5 times |
| |
|
|
|
|
of diameter |
| NOMINAL SIZES AND UNIT WEIGHT |
| Designation |
Designation
Diameter (mm.) |
Unit Weight
(Kg./m.) |
Cross Sectional
 |
| DB12 |
12 |
0.888 |
1.13 |
| DB16 |
16 |
1.578 |
2.01 |
| DB20 |
20 |
2.466 |
3.14 |
| DB25 |
25 |
3.853 |
4.91 |
| DB28 |
28 |
4.834 |
6.16 |
| DB32 |
32 |
6.313 |
8.04 |
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