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【Bar】


　Specifications: Φ12－Φ50mm rounds and rebar with 6-12m length
Grades: low and high carbon steel, low alloy steel, rebar, ring chain steel
The products are mainly used in construction, bridge, road building, machinery processing, water conservancy and oil fields.
In 2001, hot rebar with high quality was honored as "Golden Prize" on metallurgical products.

Spec. (mm)
Material
Size (m)
Standard
φ6 - φ50
HRB335
6-12
GB1499-98

Hot rolling rib reinforcing steel bar mechanics property (GB1499－98)
Sign
Nominal Diameter mm
бs（或б p0.2） MPa
бb MPa
δ5 ％
less than
HRB335
6－25、28－50
335
490
16
HRB400
6－25、28－50
400
570
14
HRB500
6－25、28－50
500
630
12

Hot rolling rib reinfocing steel bar REF (GB1499－98)
Sign
Fomer Sign
chemical composition %
C
Si
Mn
V
Nb
Ti
P
S
HRB335 20MnSi 0.17-0.25
 0.40-0.80
 1.20-1.60       ≤0.045
 ≤0.045
HRB400
 20MnSiV
 0.17-0.25 0.20-0.80
 1.20-1.60 0.04-0.12     ≤0.045
 ≤0.045
20MnSiNb 0.17-0.25 0.20-0.80 1.20-1.60   0.02-0.04   ≤0.045
 ≤0.045
20MnTi
 0.17-0.25 0.17-0.37
 1.20-1.60     0.02-0.05
 ≤0.045
 ≤0.045
HRB500               ≤0.045
 ≤0.045

Hot rolling rib reinforcing steel bar surface shape and allowance size (GB1499－98)
Nominal diameter
 Inner
diameter (d)		 across
rib height (h)
 vertical
rib height (h)
 across rib width (b)
 vertical rib width (a)
nominal
dimension		 allowance nominal
dimension		 allowance nominal
dimension		 allowance
6
5.8
±0.3
0.6
+0.3
-0.2
0.6
±0.3
0.4
1.0
8
7.7
±0.4
0.8
+0.4
-0.2
0.8
±0.5
0.5
1.5
10
9.6
1.0
+0.4
-0.3
1.0
0.6
1.5
12
11.5
1.2
±0.4
1.2
±0.8
0.7
1.5
14
13.4
1.4
1.4
0.8
1.8
16
15.4
1.5
1.5
0.9
1.8
18
17.3
1.6
+0.5
-0.4
1.6
1.0
2.0
20
19.3
±0.5
1.7
±0.5
1.7
1.2
2.0
22
21.3
1.9
±0.6
1.9
±0.9
1.3
2.5
25
24.2
2.1
2.1
1.5
2.5
28
27.2
±0.6
2.2
2.2
1.7
3.0
32
31.0
2.4
+0.8
-0.7
2.4
±1.1
1.9
3.0
36
35.0
2.6
+1.0
-0.8
2.6
2.1
3.5
40
38.7
±0.7
2.9
±1.1
2.9
2.2
3.5
50
48.5
±0.8
3.2
±1.2
3.2
±1.2
2.5
4.0
　Note: 1 vertical rib oblique angleΘ 0°－30°
　　　　2　dimension　a　and b are REF data

across rib width (b)
vertical rib width (a)
spacing (L)
 across rib end max. spcing (nominal circumference of 10％ chord length)
nominal
dimension
allowance
0.4
1.0
4.0
±0.5
1.8
0.5
1.5
5.5
2.5
0.6
1.5
7.0
3.1
0.7
1.5
8.0
3.7
0.8
1.8
9.0
4.3
0.9
1.8
10.0
5.0
1.0
2.0
10.0
5.6
1.2
2.0
10.0
±0.8
6.2
1.3
2.5
10.5
6.8
1.5
2.5
12.5
7.7
1.7
3.0
12.5
±1.0
8.6
1.9
3.0
14.0
9.9
2.1
3.5
15.0
11.1
2.2
3.5
15.0
12.4
2.5
4.0
16.0
15.5
　Note: 1 vertical rib oblique angleΘ 0°－30°
　　　　2　dimension　a　and b are REF data

Hot rolling rib reinforcing steel bar bending property (GB1499－1998）
Sign
Nominal Diametermm
bending test, beding core R
HRB335
6～25、 28～50
3a、 4a
HRB400
6～25、 28～50
4a、 5a
HRB500
6～25、 28～50
6a、 7a

Reinforcing steel bar nominal sectional area and theoretical weight (GB1499－1998）
Nominal Diameter (mm)
nominal sectional area (mm2)
theroetical weight (kg/m)
6
8
10
12
14
16
18
20
22
25
28
32
36
40
50
28.27
50.27
78.54
113.1
153.9
201.1
254.5
314.2
380.1
490.9
615.8
804.2
1018
1257
1964
0.222
0.395
0.617
0.888
1.21
1.58
2.00
2.47
2.98
3.85
4.83
6.31
7.99
9.87
15.42
　　Note: the theroetical weight is calculated according to the thickness of 7.85g/cm3

Reinforcing steel bar actual weight and theroetical weight allowance (GB1499－1998）
Nominal Diameter (mm)
Reinforcing steel bar actual weight and theroetical weight allowance (％)
6～12
±7
14～20
±5
22～50
±4

Round Steel Products
Steel Kinds
Steel No.
Spec.
Usage
Quality carbon structual steel
45
Ф 12～Ф80
tools, axis materials and standard pieces etc.
Alloy structual steel
40Cr
Ф 12～Ф60
forging, axis materials etc.
Alloy structual steel
20CrMo
Ф19 、Ф22、 Ф25
steel for oil taking rod
Cold upsetting steel
M10
M35
Ф14～ Ф20
bolt-on pieces
Round circle chain steel
23MnSiV
Ф 18、Ф20、 Ф22
circle and chain pieces