ST44 Black Sheet
ST44 Quality Sheet Slab is a flat steel in roll or sheet form, the thickness of which varies in the range of 1.50 – 20.00 mm, obtained by hot rolling of the rectangular semi-product, which is formed as a result of the solidification of the liquid steel with the continuous casting technique, in the hot rolling mill. .
ST44 Quality Sheet Black sheets are flat steels produced by hot rolling. They are the most produced and consumed products in Turkey and in the world. Especially in developed and developing countries, its production and consumption is increasing every year. The usage areas of black sheets are very wide.
Sheet Grades
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Class
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ST44-3 (S275J0)
|
|
Number
|
10.144
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|
Classification
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Non-alloy quality structural steel
|
|
Standard
|
EN 10025-2: 2004 Hot rolled structural steel products. Technical delivery conditions of non-alloy structural steels
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Chemical Properties of ST44 Steel %
|
C
|
Mn
|
P
|
S
|
N
|
Cu
|
CEV
|
|
max 0.18
|
max 1.5
|
max 0.035
|
max 0.035
|
max 0.012
|
max 0.55
|
max 0.42
|
Chemical Properties of ST44 Steel %= <40 (mm) CEV max = 0.40
Mechanical Properties of ST44 Steel
|
Nominal thickness (mm):
|
3’e kadar
|
3 – 100
|
100 – 150
|
150 – 250
|
|
Rm – Tensile strength (MPa) Flat and long products
|
430-580
|
410-560
|
400-540
|
380-540
|
|
Nominal thickness (mm):
|
16’ya kadar
|
16 – 40
|
40 – 63
|
63 – 80
|
80 – 100
|
100 – 150
|
150 – 200
|
200 – 250
|
|
ReH – Minimum yield strength (MPa) Flat and long products
|
275
|
265
|
255
|
245
|
235
|
225
|
215
|
205
|
|
KV – Impact energy (J) longitude,
|
-20 °
|
0 °
|
+ 20 °
|
|
|
|
27
|
27
|
27
|
|
|
|
|
|
|
|
|
|
|
Nominal thickness (mm):
|
1’e kadar
|
1 – 1,5
|
1,5 – 2
|
2 – 2,5
|
2,5 – 3
|
|
A – Min. elongation Lo = 80 mm (%) parallel,
|
15
|
16
|
17
|
18
|
19
|
|
|
|
|
|
|
|
Nominal thickness (mm):
|
Mar.40
|
40 – 63
|
63 – 100
|
100 – 150
|
150 – 250
|
|
A – Min. elongation Lo = 5.65 √ So (%) parallel,
|
23
|
22
|
21
|
19
|
18
|
Hot Rolled Non-Alloy Structural Steels
|
Chemical Composition (%)
|
|
Standard Equivalent
|
ERDEMİR
|
C d(Thickness, mm)
|
Mn
|
P
|
S
|
Si
|
Cu
|
N(1)
|
|
CE(IIW) (4) max. (%)
|
|
|
|
Quality No
|
<16
|
16<d<40
|
40<d<100
|
|
|
|
|
|
|
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d (mm)
|
|
|
Standard
|
Quality
|
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
max.
|
<30
|
30<d<40
|
40<d<100
|
|
EN 10025-2
|
S275JR+AR
|
3244(5)
|
0.21
|
0.21
|
0.22
|
1.50
|
0.035
|
0.035
|
–
|
0.55
|
0.012
|
0.40
|
0.40
|
0.42
|
Descriptions
5) Max. for S275 and S355 grades. Carbon equivalent (CEV) can be increased by 0.02% for %Si ≤ 0.04 and 0.01% for %Si ≤ 0.25.
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