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According to TIS 20-2543 in diameter grades SR24
Equivalent to : JIS G3112 (1987), AS/NZS 4671:2001 AS1302-1991, SS2: Part2 : 1999 NZS 3402 : 1989

CHEMICAL  COMPOSITION (%)
Grade Carbon Manganese Phosphorus Sulphur
(Carbon+Manganese)/6
SD30 0.3 - 0.06 0.06 0.5
SD40 - 1.85 0.06 0.06 0.55

PHYSICAL  PROPERTIES
Grade yield strength
not less than 
Tensile strength
not less than 
Elongationnot less than (%) Cold  Bend Test
(kgf/mm2) (kgf/mm2) Bending Angle Diameter of Mandrel
SD30 30 49 17 180° 3,4 times
          of diameter
SD40 40 57 15 180° 5 times
          of diameter

NOMINAL  SIZES  AND UNIT  WEIGHT
Designation Designation Unit Weight Cross Sectional
Diameter (mm.) (Kg./m.) Area (cm2)
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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