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Chemical Composition and Mechanical Properties:

Symbol

 
Chemical Composition%
Mechanical Properties
C
SI
Mn
P
S
Bending Test
Tensile Strength(Mpa)
Elongation(%)
Q195
0.06-0.12
0.30
0.25-0.50
0.045
0.050
180°d=0
315-430
33  
Q215
0.09-0.15
0.30
0.25-0.55
0.045
0.050
180°d=0
335-450
31
Q235
0.14-0.22
0.30
0.30-0.65
0.045
0.050
180°d=0
37-500
26

Allowable Thickness Tolerance for Cold –rolled Strip:Unit:mm

Nominal Thickness

Allowable Thickness Tolerance
 
PT.B
 
PT.A
Nominal Width
Nominal Width
 
630
630~≤1000
630
630~≤1000
0.15-0.30
±0.01
 
±0.015
 
0.30-0.40
±0.015
±0.02
±0.020
±0.030
0.40-0.60
±0.020
±0.025
±0.030
±0.040
0.60-0.80
±0.025
±0.030
±0.035
±0.045
0.80-1.20
±0.030
±0.035
±0.050
±0.060
1.20-2.0
±0.050
±0.060
±0.070
±0.080

Allowable Width Tolerance for Edge Cut of Cold-rolled Strip:(Unit):mm

Nominal Thickness

Allowable Width Tolerance
Nominal Width
125~400
400~630
630~900
0.50
0
-0.30
0
-0.35
0
-0.60
0.5~1.0
0
-0.40
0
-0.45
0
-0.80
1.0
0
-0.45
0
-0.50
0
-1.0

 Allowable Unflatness value for Cold-rolled Strip:(Unit):mm

Nominal Width

 
Unflatness ≤
High Precision B
Normal Precision A
Nominal Thickness
0.50
0.50~1.20
1.20
0.50
0.50~1.20
1.20
200
3
2
2
5
4
3
200~400
4
3
2
6
5
4
400~630
5
4
3
7
6
5
630~1000
6
5
4
10
8
6

2018629山西十一选五