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PRODUCT SPECIFICATIONS

Chemical Composition
Constituent Percent, Maximum
Fe 415 Fe 415D Fe 500 Fe 500D Fe 550 Fe550D Fe600
Carbon 0.30 0.25 0.30 0.25 0.30 0.25 0.30
Sulphur 0.060 0.045 0.055 0.040 0.055 0.040 0.040
Phosphorus 0.060 0.045 0.055 0.040 0.055 0.040 0.040
Sulphur & Phosphorus 0.110 0.085 0.105 0.075 0.100 0.075 0.075


Nominal Cross-Sectional Area & Mass

S.No. Nominal Size(mm) Cross Sectional Area (mm) Mass per Meter (kg) Permissible Tolerance for Individual Sample
1 8 50.3 0.395 -7%
2 10 78.6 0.617 -7%
3 12 113.1 0.888 -5%
4 16 201.2 1.580 -5%
5 20 314.3 2.470 -3%
6 25 491.1 3.850 -3%
7 28 615.8 4.830 -3%
8 32 804.6 6.310 -3%


Mechanical Properties
Properties Fe
415
Fe
415D
Fe
500
Fe
500D
Fe
550
Fe
550D
Fe
600
0.2% proof stress/Yield stress, Min,N/mm square 415 415 500 500 550 550 600
Elongation, Min. on gauge length 5.65/A*, 14.5% 18.0% 12.0% 16.0% 10.0% 14.5% 10.0%
Total Elongation at max. Force, Min. on gauge length 5.65/A*, - 5% - 5% - 5% -
Tensile strength, Min 10% more than the actual 0.2% proof Strees/yield Stress but not less than 485.0 N/mm square 12% more than the actual 0.2% proof Strees/yield Stress but not less than 500.0 N/mm square 8% more than the actual 0.2% proof Strees/yield Stress but not less than 545.0 N/mm square 10% more than the actual 0.2% proof Strees/yield Stress but not less than 565.0 N/mm square 6% more than the actual 0.2% proof Strees/yield Stress but not less than 585.0 N/mm square 8% more than the actual 0.2% proof Strees/yield Stress but not less than 600.0 N/m 6% more than the actual 0.2% proof Strees/yield Stress but not less than 660.0


Nomenclature
The following nomenclatures should be considered as per standards:
Batch / Bundle / Elongation / Longitudinal Rib / nominal diameter or size / nominal Mass / nominal perimeter of a deformed bar / 0.2 percent proof stress/ percentage total elongation at maximum force/ tensile strength / transverse rib / yield stress


The standard tests are carried out during the production of Sidhbali TMT Bar are:

Test for Tensile Strength
The Tensile strength, percentage elongation, percentage total elongation at maximum force and 0.2 percent proof stress of bars shall be determined in accordance with requirements of IS:1608 read in conjunction with IS:2062

Test for Bending Ability
The test sample when cold shall be ddoubled over the specified mandrel by continuous pressure until the sides are parallel. The test sample shall be considered to have passed the test if there is no rupture or cracks visible to a person of normal or corrected vision on the bend portion



Test for Re-bending Ability
The test sample shall be bend to an included angle of 135° using a mandrel of appropriate diameter. The bent piece shall be aged by keeping in boiling water 100° C for 30 min and then allowed to cool. The piece shall then be bend back to have an included angle of 157°.50 the test sample shall be considered to have passed the test if there is no rupture or cracks visible to a person of normal or corrected vision on the re-bend portion.