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Bobina de acero al carbono laminada en caliente Q345

2023-07-17 13:55:48

Product introduction

◆  Normas

Acero al carbono Q345 ES
ASTM
ESTRUENDO
JIS
NF ES
BS ES
YO ASI
Q345A

Gr.50

Gr.B

Gr.C Gr.D

Gr.A

A808M

E335
SPFC590
E335
E335

HS355CC

E355CC

Q345B

Gr.50

Gr.B

Gr.C Gr.D

Gr.A

A808M
S335JR
SPFC590 E335JR
E335JR

E355CC

Q345C

Gr.C Gr.D

tipo7

Gr.A

A808M

Gr.50

S355JO
SPFC590 S335JO
S335JO

E355DD

Q345D

tipo7

Gr.50

S355J2G3

S355J2G4

S355K2G3

S355K2G4

SPFC590

S355J2G3

S355J2G4

S355K2G3

S355K2G4

S355J2G3

S355J2G4

S355K2G3

S355K2G4

E355DD
Q345E

tipo7

Gr.50

S355NL

S355ML

SPFC590

S355NL

S355ML

S355NL

S355ML

E355E

E355DD


Propiedades

Propiedades químicas

Grado y composición química del acero al carbono Q345 (análisis de fundición):

Q345
nivel de calidad C
Si
Minnesota
PAG
S
Nótese bien
V
ti
cr
Ni
cobre
norte
Mes
B
también
A
≤0.20
≤0.50 ≤1.70 ≤0.035 ≤0.035 ≤0.07 ≤0.15 ≤0.20 ≤0.30 ≤0.50 ≤0.30 ≤0.012 ≤0.10 -
-
B
≤0.035 ≤0.035
C
≤0.030 ≤0.030 ≥0.07
D
≤0.18 ≤0.030 ≤0.025
E
≤0.025 ≤0.020


Carbon equivalent of Q345 carbon steel delivered in hot-rolled and controlled-rolled state :

Q345 carbon steel Carbon Equivalent(CEV)/%

Nominal Thickness or Diameter

≤63mm

Nominal Thickness or Diameter

>63mm~250mm

Nominal Thickness

>250mm

≤0.44
≤0.47 ≤0.47


Carbon equivalent of Q345 hot rolled carbon steel coil delivered in normalized, normalized rolled, normalized plus tempered state :

Q345 hot rolled carbon steel coil Carbon Equivalent(CEV)/%

Nominal Thickness

≤63mm

Nominal Thickness

>63mm~120mm

Nominal Thickness

>120mm~250mm
≤0.45 ≤0.48 ≤0.48


The carbon equivalent of Q345 steel coil delivered in the state of thermomechanical rolling (TMCP) or thermomechanical rolling plus tempering :

Q345 steel coil Carbon Equivalent(CEV)/%

Nominal Thickness

≤63mm

Nominal Thickness

>63mm~120mm

Nominal Thickness

>120mm~150mm
≤0.44 ≤0.45 ≤0.45


Pcm value of Q345 carbon steel delivered in the state of thermomechanical rolling (TMCP) or thermomechanical rolling plus tempering :

Q345 carbon steel Pcm/%
≤0.20


Mechancal properties:

Q345 Carbon Steel
Quality Level

Yield strength at the following nominal thickness (diameter, side length)(ReL)/MPa

≤16mm

>16mm

~

40mm

>40mm

~

63mm

>63mm

~

80mm

>80mm

~

100mm

>100mm

~

150mm

>150mm

~

200mm

>200mm

~

250mm

>250mm

~

400mm
A
≥345
≥335 ≥325 ≥315 ≥305 ≥285 ≥275 ≥265 -
B
C
D
≥265
E


Q345 Steel Coil
Quality Level

Tensile strength at the following nominal thickness (diameter, side length)(Rm)/MPa

≤40mm

>40mm

~

63mm

>63mm

~

80mm

>80mm

~

100mm

>100mm

~

150mm

>150mm

~

250mm

>250mm

~

400mm
A
470~630
470~630 470~630 470~630 450~600 450~600 -
B
C
D
450~600
E


Q345 Hot Rolled Carbon Steel Coil
Quality Level

Elongation after break (A)/%
Nominal thickness (diameter, side length)

≤40mm

>40mm

~

63mm

>63mm

~

100mm

>100mm

~

150mm

>150mm

~

250mm

>250mm

~

400mm
A
≥20
≥19 ≥19 ≥18 ≥17 -
B
C
≥21 ≥20 ≥20 ≥19 ≥18
D
≥17
E


Q345 Carbon Steel
Quality Level Test temperature/℃

Impact absorption energy (KV2)a*/J

Nominal thickness (diameter, side length)

12mm~150mm

>150mm~250mm

>250mm~400mm

B
20
≥34 ≥27 -
C
0
D
-20
27
E
-40
a The impact test takes a longitudinal sample.


Q345 Steel Coil Specimen Direction
180°bending test
[d=centroid diameter, α=sample thickness (diameter)]
Flat material with a width of not less than 600mm, transverse specimen for tensile test. For flat materials, profiles and bars with a width less than 600mm, longitudinal samples shall be taken.
Steel thickness (diameter, side length)
≤16mm
>16mm~100mm


Characteristic

Q345 steel coil is a low-alloy high-strength structural steel material, Q represents the yield strength of this steel, and the latter 345 represents the yield value, and it will increase with the thickness of Q345 hot rolled carbon steel coil. Its yield value decreases.

Q345 carbon steel has good comprehensive mechanical properties such as low temperature performance, plasticity and weldability, and can be used for various structural parts in cold environments below -40 °C.


Industria y aplicación

Las bobinas de acero al carbono laminadas en caliente Q345 se utilizan ampliamente en la construcción, puentes, vehículos, barcos, recipientes a presión y otras industrias.

En el estado de laminación en caliente o normalización, las bobinas de acero Q345 se utilizan principalmente para fabricar recipientes de baja y media presión, tanques de petróleo, grúas, maquinaria de minería, centrales eléctricas, puentes y otras estructuras dinámicas de carga, piezas mecánicas, estructuras de edificios y piezas estructurales metálicas en general.


Información de compras

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