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　Pig Iron 　Steel Billet 　Bar
　Wire Rod 　DIP 　Urea
　Heavy Truck 　Medium strip 　Steel Pipe
　Water dregs and Coking
　　by-product		 　Pipe Fittings 　Wooden & plastic
　　window and door
　Housing 　Inkstonea    

【Medium strip】


　　Medium strip,made out with hot rolled technology,is the raw material of cold rolled strip,cole bend section and welded steel pipe.It has been widely used in automobile industry,engineering industry,construction projects and daily hardware etc fields.
      The main finds of the product include carbon structural steel,quality carbon structural steel,low alloy steel etc.The specifications are thickness (1.5mm~8.0mm),breadth (350mm~700mm), coildiameter (inner diameter 520mm,outer diameter 1500mm),max single weight (11.1kg/mm) and max coil weight (7.45t).

 Thickness Tolerance of Hot Rolled Plate and Strip（GB709-88）
Width（mm）
600-700
Thickness（mm）
Fine rolling
Common rolling
＞1.50-1.60
±0.12
±0.15
＞1.60-1.80
±0.13
±0.15
＞1.80-2.00
±0.14
±0.16
＞2.00-2.20
±0.15
±0.17
＞2.20-2.50
±0.16
±0.18
＞2.50-3.00
±0.17
±0.19
＞3.00-3.50
±0.18
±0.20
＞3.50-4.00
±0.21
±0.23
＞4.00-5.50

+0.10
-0.30
+0.20
-0.40
＞5.50-6.50
+0.10
-0.40
+0.20
-0.50
＞7.00-8.00
+0.10
-0.70
+0.20
-0.80

 Hot Rolled Thick Plate of High-Quality Carbon Structural Steel and Wide Strip
（GB711-88）
Thickness（mm）
Size,Appearance and Tolerance
4-8
Auord With GB709-88

 Hot Rolled Sheet of High-Quality Carbon Structural Steel and Strip（GB710-91）
Thickness（mm）
Size,Appearance and Tolerance
1.5-4
Auord With GB709

 Carbon Structural Steel and The Thick Steel Plate of Hot Rolling of Low Structural Alloy Steel and Strip（GB3274-88）
Width（mm）
Thickness（mm）
Size,Appearance and Tolerance
≥600
4-8
Auord With GB709

 Carbon Structural Steel and Thickness Tolerance of The Steel Strip of Hot Rolling of Low Structural Alloy Steel（GB/T3534-92）
Width（mm）
Thickness（mm）
Tolerance（mm）
350-600
≤3.00
±0.20
＞3.00-5.00
±0.24
＞5.00
±0.27

 Carbon Structural Steel and Width Tolerance of The Steel Strip of Hot Rolling of Low Structural Alloy Steel（GB/T3534-92）
Width（mm）
No Edge Cut（mm）
Edge Cut（mm）
350-600
+3.0
-2.0
±1.0

 Thickness Tolerance of Hot Rolled Strip Used for Welded Steel Pipe（GB/T8164-93）
Width（mm）
Thickness（mm）
Tolerance（mm）
350-600
1.8;2.0;2.2
±0.18
2.5;2.8;3.0
±0.20
3.2;3.5;3.8;4.0
±0.25
4.2;4.5;4.8;5.0;5.5
±0.29
6.0;6.5;7.0
±0.32
7.5;8.0
±0.39

 Width Tolerance of Hot Rolled Strip Used for Welded Steel Pipe（GB/T8164-93）
Width（mm）
No Edge Cut（mm）
Edge Cut（mm）
350-600
By Negotiation
±1.0

 Chemical Composition of Carbon Plain Structural Steel（GB700－88）
Trademark
Grade
Chemical Composition ％
Deoxidation Mathod
C
Mn
Si
S
P
Less Than
Q195
-
0.06－0.12
0.25－0.50
0.30
0.05
0.045
F、B、Z
Q215
A
0.09-0.15
0.25－0.55
0.30
0.05
0.045
F、B、Z
B
0.045
Q255
A
0.14-0.22
0.30-0.65(1)
0.30
0.05
0.045
F、B、Z
B
0.12-0.20
0.30-0.70(1)
0.045
C
≤0.18
0.30－0.80
0.04
0.04
D
≤0.17
0.035
0.035
TZ
Q255
A
0.18-0.28
0.40-0.70
0.30
0.05
0.045
F、B、Z
B
0.045

 Chemical Composition of HIgh-Quality Carbon Plain Structural Steel（GB/T699－1999）
NO.
Code
Trademark
Chemical Composition ％
C
Si
Mn
Cr
Ni
Cu
Less Than
1
U20082
08
0.05-0.11
0.17-0.37
0.35-0.65
0.10
0.30
0.25
2
U20102
10
0.07-0.13
0.17-0.37
0.35-0.65
0.15
0.30
0.25
3
U20152
15
0.12-0.18
0.17-0.37
0.35-0.65
0.25
0.30
0.25
4
U20202
20
0.17-0.23
0.17-0.37
0.35-0.65
0.25
0.30
0.25
5
U20252
25
0.22-0.29
0.17-0.37
0.50-0.80
0.25
0.30
0.25
6
U20302
30
0.27-0.34
0.17-0.37
0.50-0.80
0.25
0.30
0.25
7
U20352
35
0.32-0.39
0.17-0.37
0.50-0.80
0.25
0.30
0.25
8
U20402
40
0.37-0.44
0.17-0.37
0.50-0.80
0.25
0.30
0.25
9
U20452
45
0.42-0.50
0.17-0.37
0.50-0.80
0.25
0.30
0.25
10
U20502
50
0.47-0.55
0.17-0.37
0.50-0.80
0.25
0.30
0.25
11
U20552
55
0.52-0.60
0.17-0.37
0.50-0.80
0.25
0.30
0.25
12
U20602
60
0.57-0.65
0.17-0.37
0.50-0.80
0.25
0.30
0.25
13
U20652
65
0.62-0.70
0.17-0.37
0.50-0.80
0.25
0.30
0.25
14
U20702
70
0.67-0.75
0.17-0.37
0.50-0.80
0.25
0.30
0.25
15
U20752
75
0.72-0.80
0.17-0.37
0.50-0.80
0.25
0.30
0.25
16
U20802
80
0.77-0.85
0.17-0.37
0.50-0.80
0.25
0.30
0.25
17
U20852
85
0.82-0.90
0.17-0.37
0.50-0.80
0.25
0.30
0.25
18
U21152
15Mn
0.12-0.18
0.17-0.37
0.70-1.00
0.25
0.30
0.25
19
U21202
20Mn
0.17-0.23
0.17-0.37
0.70-1.00
0.25
0.30
0.25
20
U21252
25Mn
0.22-0.29
0.17-0.37
0.70-1.00
0.25
0.30
0.25
21
U21302
30Mn
0.27-0.34
0.17-0.37
0.70-1.00
0.25
0.30
0.25
22
U21352
35Mn
0.32-0.39
0.17-0.37
0.70-1.00
0.25
0.30
0.25
23
U21402
40Mn
0.37-0.44
0.17-0.37
0.70-1.00
0.25
0.30
0.25
24
U21452
45Mn
0.42-0.50
0.17-0.37
0.70-1.00
0.25
0.30
0.25
25
U21502
50Mn
0.48-0.56
0.17-0.37
0.70-1.00
0.25
0.30
0.25
26
U21552
60Mn
0.52-0.60
0.17-0.37
0.70-1.00
0.25
0.30
0.25
27
U21602
65Mn
0.57-0.65
0.17-0.37
0.70-1.00
0.25
0.30
0.25
28
U21652
70Mn
0.62-0.70
0.17-0.37
0.90-1.20
0.25
0.30
0.25
 The note: The trade mark listed is a high-quality steel in the form. If it is the advanced high-quality steel, add" A"( unifies the last figure of figure and changes into" 3") after the trade mark ; If it is the expert high-quality steel, add" E"( unifies the last figure of figure and changes into" 6") after the trade mark ; To the boiling steel, add" F"( unifies the last figure of figure and changes into" 0") after the trade mark ; At half-composure steels, add" b"( unify figure switch over to" 1" by the last figure) behind the trade mark.

 Chemical Composition of Low Alloy High Strength Structural Steel（GB1591－94）
Trademark
Grade
Chemical Composition ％
C≤
Mn
Si≤
P≤
S≤
V
Nb
Ti
Al≤
Cr≤
Ni≤
Q235
A
0.16
0.80-1.50
0.55
0.045
0.045
0.02-0.15
0.015-0.060
0.02-0.20
-

B
0.16
0.80-1.50
0.55
0.040
0.040
0.02-0.15
0.015-0.060
0.02-0.20
-
Q345
A
0.20
1.00-1.60
0.55
0.045
0.045
0.02-0.15
0.015-0.060
0.02-0.20
-
B
0.20
1.00-1.60
0.55
0.040
0.040
0.02-0.15
0.015-0.060
0.02-0.20
-
C
0.20
0.17-0.37
0.55
0.035
0.035
0.02-0.15
0.015-0.060
0.02-0.20
0.15
D
0.18
1.00-1.60
0.55
0.030
0.030
0.02-0.15
0.015-0.060
0.02-0.20
0.15
E
0.18
1.00-1.60
0.55
0.025
0.025
0.02-0.15
0.015-0.060
0.02-0.20
0.15
Q390
A
0.20
1.00-1.60
0.55
0.045
0.045
0.02-0.20
0.015-0.060
0.02-0.20
-
0.30
0.70
B
0.20
1.00-1.60
0.55
0.040
0.040
0.02-0.20
0.015-0.060
0.02-0.20
-
0.30
0.70
C
0.20
1.00-1.60
0.55
0.035
0.035
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.30
0.70
D
0.20
1.00-1.60
0.55
0.030
0.030
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.30
0.70
E
0.20
1.00-1.60
0.55
0.025
0.025
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.30
0.70
Q420
A
0.20
1.00-1.70
0.55
0.045
0.045
0.02-0.20
0.015-0.060
0.02-0.20
-
0.40
0.70
B
0.20
1.00-1.70
0.55
0.040
0.040
0.02-0.20
0.015-0.060
0.02-0.20
-
0.40
0.70
C
0.20
1.00-1.70
0.55
0.035
0.035
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.40
0.70
D
0.20
1.00-1.70
0.55
0.030
0.030
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.40
0.70
E
0.20
1.00-1.70
0.55
0.025
0.025
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.40
0.70
Q460
C
0.20
1.00-1.70
0.55
0.035
0.035
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.70
0.70
D
0.20
1.00-1.70
0.55
0.030
0.030
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.70
0.70
E
0.20
1.00-1.70
0.55
0.025
0.025
0.02-0.20
0.015-0.060
0.02-0.20
0.15
0.70
0.70
 The note: A1 in the form is the whole aluminium quantity. Such as testing it when the acid dissolves the aluminium, its content should not be smaller than 0 . 010%