Company Info
Message from the President
Corporate Philosophy
Corporate Profile
Human Resources Development
Community Activities
Business Info
Products
Manufacturing Process
Quality Control Process
Contact Us
Site Map
OTANI STEEL CORPORATION

VCON rebar, manufactured by means of our proprietary production system, which has a high level of quality control, is a product with a high performance history and superb quality, among its other excellent features. The product meets many strict regulations and standards and is ideally suited to a wide range of applications.


OTANI gives you a choice of the g3 Vsh
Choose between three product categories according to the nature of the construction work or its various purposes.

Displaying the steel grade and size makes  our products easir and  more accurate to work with
@@@
OTANI marks each of our rebars with both its steel grade and size. This makes it possible to visually check the steel grade and size, making them much easier to work with and bringing greater accuracy to the construction site.

Steel grade and size markings



By setting more control items than JIS, instigating stringent controls of chemical constituents and seeking the best shape for the ridges, we have created products with a high degree of weldability and workability. We also carry out a variety of tests and inspections in addition to inspection items that are covered by JIS standards.

* We started manufacturing STANDARD VCON marked with steel grade and size on February 1 2010. You may find the old-style products mixed in with the new gsteel grade and sizeh marked ones arriving in your orders for a while. They can both be used as STANDARD VCON. There is no difference in quality between them. We apologize for any inconvenience or confusion this might cause, and hope that you will understand and appreciate our position.
Type code Chemical constituents %
C Si Mn P S C+Mn/6
SD295A - - - 0.050 or less 0.050 or less -
SD345 0.27 or less 0.55 or less 1.60 or less 0.040 or less 0.040 or less 0.50 or less
SD390 0.29 or less 0.55 or less 1.80 or less 0.040 or less 0.040 or less 0.55 or less
SD490 0.32 or less 0.55 or less 1.80 or less 0.040 or less 0.040 or less 0.60 or less
Type code Yield point or
proof stress
N/mm2
Tensile strength
N/mm2
Tensile strength test specimen Elongation()
%
Bendability
Bending angle Inner radius
SD295A 295 or higher 440-600 Equivalent to a No.2 test piece 16 or higher 180 D16 or lower
1.5 times greater than the nominal diameter
Equivalent to a No.14A test piece 17 or higher Higher than D16
2 times greater than the nominal diameter
SD345 345-440 490 or higher Equivalent to a No.2 test piece 18 or higher 180 D16 or lower
1.5 times greater than the nominal diameter
Equivalent to a No.14A test piece 19 or higher Higher than D16 and equal to or lower than D38
2 times greater than the nominal diameter
SD390 390-510 560 or higher Equivalent to a No.2 test piece 16 or higher 180 2.5 times greater than the nominal diameter
Equivalent to a No.14A test piece 17 or higher
SD490 490-625 620 or higher Equivalent to a No.2 test piece 12 or higher 90 D25 or lower
2.5 times greater than the nominal diameter
Equivalent to a No.14A test piece 13 or higher Higher than D25
3 times greater than the nominal diameter
If the bar is designated as larger than D32: for every of 3 point increase in the bar designation, 2% should be subtracted from the elongation value listed; however, the total subtracted amount should not exceed 4%.
Bar designation Nominal diameter
(d)mm
Nominal perimeter
( I)cm
Nominal cross sectional area
(S)cm2
Unit mass
kg/m
Maximum average spacing of ridges
mm
Ridge height Maximum value of the sum of spaces between ridges
mm
Minimum
mm
Maximum
mm
D10 9.53 3.0 0.7133 0.560 6.7 0.4 0.8 7.5
D13 12.7 4.0 1.267 0.995 8.9 0.5 1.0 10.0
D16 15.9 5.0 1.986 1.56 11.1 0.7 1.4 12.5
D19 19.1 6.0 2.865 2.25 13.4 1.0 2.0 15.0
D22 22.2 7.0 3.871 3.04 15.5 1.1 2.2 17.5
D25 25.4 8.0 5.067 3.98 17.8 1.3 2.6 20.0
D29 28.6 9.0 6.424 5.04 20.0 1.4 2.8 22.5
D32 31.8 10.0 7.942 6.23 22.3 1.6 3.2 25.0
D35 34.9 11.0 9.566 7.51 24.4 1.7 3.4 27.5
D38 38.1 12.0 11.40 8.95 26.7 1.9 3.8 30.0
D41 41.3 13.0 13.40 10.5 28.9 2.1 4.2 32.5
D51 50.8 16.0 20.27 15.9 35.6 2.5 5.0 40.0
Size Tolerance per piece @ Tolerance per set
From D10 to D16 }6% @ }5%
From D16 to D29 }5% @ }4%
Higher than D29 }4% @ }3.5%
Length Tolerance
7 m or less +40mm
0
Longer than 7 m For every 1 m increase in length (or fraction of 1 m), 5 mm should be added to the upper tolerance value; however, the value should not exceed 120 mm.
SD295A
SD345
SD390
SD490
Even better VCON
@@@



The SUPER VCON is our original product that displays a 4-figure identification number (*) after its steel grade and size, making it suitable for construction work requiring strict material control and high reliability. This ensures that each rebar used on the site is traceable, even after the product bundles have been unbound or the rebars have been cut, thus making thorough quality control possible. (Patent pending)

* The identification number on SUPER VCON is a proprietary number used by OTANI Steel corresponding to the molten steel lot number.
3 VCON to match your needs
@@@
It is not only our standard products that achieve VCON performance. We also manufacture custom-made products to meet such customer requirements as specific chemical constituents or dimensions, as well as the need to take into account the customerfs machining and use conditions. Please feel free to consult with us about the length, mechanical properties and chemical composition you are looking for.

Back to Top
Copyright(C) 2006 OTANI STEEL CORPORATION Inc. All Rights Reserved.