Steelmaking Products
|
Name |
Implementation Standards |
|||||
|
Standard |
Grade |
AS M E / ASTM |
JIS |
DIN |
EN |
|
|
High strength low alloy structural steel |
GB/T1 591-2008 |
Q345B |
Gr.50/Gr.345 |
SPFC590 |
S335JR |
EN S335JR |
|
Q345C |
Gr.50/Gr.345 |
SPFC590 |
S335JO |
EN S335JO |
||
|
Q345D |
Gr.50/Gr.345 |
SPFC590 |
S335J2 |
EN S335J2 |
||
|
Q345E |
Gr.50/Gr.345 |
SPFC590 |
S335NL |
EN S335NL |
||
Chemical Composition
|
Grade |
Grade |
Chemical Composition（%） |
||||||||||
|
C≤ |
Mn |
Si |
P |
S |
V |
Nb |
Ti |
Al≥ |
Cr≤ |
Ni≤ |
||
|
Q345 |
B |
0.2 |
1~1.6 |
0.55 |
0.040 |
0.040 |
0.02 ~ 0.015 |
0.015 ~ 0.060 |
0.02 ~ 0.20 |
|
|
|
|
C |
0.035 |
0.035 |
0.015 |
|
|
|||||||
|
D |
0.18 |
0.030 |
0.030 |
0.015 |
|
|
||||||
|
E |
0.025 |
0.025 |
0.015 |
|
|
|||||||
Mechanical Properties
|
Grade |
Grade |
Yield Point òs/Mpa |
Tensile Strength òs/Mpa |
Elongation（%）≥ |
The impact absorbing energy of Akv (vertical) /J |
||||||
|
Thickness (Diameter, Length)/mm |
|||||||||||
|
≤16 |
＞16~35 |
＞35~50 |
＞50~100 |
+20℃ |
0℃ |
-20℃ |
-40℃ |
||||
|
Q345 |
B |
345 |
325 |
295 |
275 |
470 ~ 630 |
21 |
34 |
|
|
|
|
C |
22 |
|
34 |
|
|
||||||
|
D |
22 |
|
|
34 |
|
||||||
|
E |
22 |
|
|
|
27 |
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Applicable Scope
High strength low alloy structural steel, in carbon steel (Wc=0.16%~0.2%) on the basis of adding a small amount of alloy elements is made, has good welding performance, plasticity, toughness and machining process, good corrosion resistance, high strength and low brittleness critical transition temperature. Its brand representation is basically the same as carbon structural steel. It is suitable for manufacturing structural parts of buildings, bridges, ships, vehicles, railways, high pressure vessels, boilers, automobiles, tractors, large steel structures and large military projects.
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