Bars / Rebars

The production of Khorasan Steel Company rebars takes place on the basis of the national Iranian standard under no. 3132 (revised in 20.July, 2002 for hot-rolled rebars consumed in concretes – test characteristics and methods) fall into the three categories of plain rebars (240 cm), spirally ribbed (340 rib) and   herringbone ribbed   (400 rib), Khorasan Steel Company is capable of producing rebars with herringbone ribs using quench-temper method.

Mechanica properties

Classification

Characteristic

Stress test

Cold bending test

Minimum yielding tension

N/mm²

Minimum tensile strength

N/mm²

Minimum relative prolongation

 (A5)

Bending angle (degrees)

Bending diameter test of the rebar

Plain

240 s 240 360 25 180 2d

With spiral ribs

340Aj 340 500 18 180 3d

With herringbone ribs

400Aj 400 600 16 180 5d

 

 

Nominal diameter of the d rebars

The initial length of the sample has been taken five times as much as the nominal diameter of the rebar


 

Maximum weight percent of the chemical elements in rebars produced

Classification

Characteristic

Carbon

(c)

Silicon

(si)

Manganese

(mn)

Phosphorous

(p)

Sulfur

(s)

Maximum carbon equivalent

*

Plain

240 s 0/24 0/60 0/85 0/055 0/055 -

With spiral ribs

340 Aj 0/34 0/65 1/40 0/050 0/050 0/50

With herringbone ribs

400 Aj 0/39 0/65 1/70 0/050 0/050 *
*

In welding rebars the preheating conditions should be observed in compliance with the national Iranian standard 31332 (revised on 20.July.2010)


 

Geometrical and version features of the ribbed rebars 340 and 400 herringbone ribs, produced by Khorasan Steel Company

Nominal diameter

Nominal cross section

mm2

Transverse rib

mm

Longitudinal rib

mm

step mm

Weight

Relative surface of the rib

Maximum height from the row ¼ of the height from the middle

Minimum width

Maximum width

Maximum height

Nominal width

One meter length calculations

kg

Tolerance in percentage

10 78/5 0/65 0/45 1/0 2/0 1/0 1/0 6/5 0/616 +-5/5 0/052
12 113/1 0/78 0/54 1/2 2/4 1/2 1/2 7/2 0/888 0/056
14 154 0/91 0/63 1/4 2/8 1/4 1/4 8/4 1/210 0/056
16 201 1/04 0/72 1/6 3/2 1/6 1/6 9/6 1/580 +-4/5 0/056
18 254 1/17 0/81 1/8 3/6 1/8 1/8 10/8 2/000 0/056
20 314 1/30 0/90 2/0 4/0 2/0 2/0 12/0 2/470 0/056
22 380 1/43 0/99 2/2 4/4 2/2 2/2 13/2 2/980 0/056
25 491 1/63 1/13 2/5 5/0

2/5

2/5 15/0 3/850 0/056
28 616 1/82 1/26 2/8 5/6 2/8 2/8 16/8 4/830 0/056
32 804 2/09 1/44 3/2 6/4 3/2 3/2 19/1 6/310 0/056


 

Geometrical and version specifications of the plain rebars produced by Khorasgan Steel Complex Company

Nominal diameter

Tolerance

mm

Diametrical variations

Rebar’s one meter calculated weight

kg

Tolerance in percentage

Nominal cross section of the rebar

mm2
10

0/3 +

0/5 -

Maximum / minimum diameter difference (ellipticality) must be within the 70 percent tolerance

0/616 5/5  + - 78/5
12 0/888 113/1
14 1/210 154
16

0/4 +

0/5 -

1/580 4/5 + - 201
18 2/000 254
20 2/470 314
22 2/980 380
25

0/4 +

0/6 -

3/850 491
28 4/830 616
32

0/4 +

0/7 -

6/310 804
36 7/990 1018
40 9/870 1257


 

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