low alloy high strength structural steel plate (q345b/c/d/e)-九游会亚洲

products > low alloy high strength structural steel plate (q345b/c/d/e)

low alloy high strength structural steel plate (q345b/c/d/e)

1 main use
q345  low-alloy high-strength structural steel plate series with thickness  ranging from 6 to 200mm is widely used in steel structure construction,  engineering machinery, mining machinery, heavy-duty vehicles, bridges,  pressure vessels and other engineering structures, especially for  weldability and toughness. highly important construction and mechanical engineering structures are required.
2 grades and standards
grade  q345b/c/d/e; execution standard: gb/t 1591-2008 "low-alloy  high-strength structural steel" (equivalent to japanese standard  jisg3106-2008 grade sm490, european standard en10025-04 medium grade  s355jr/j0/j2 /k2)
3 technical conditions of supply
3.1 product specifications
6~200×1500~4000×lmm
3.2 chemical composition
table 1 chemical composition %

牌号

等级

c≤

si≤

mn≤

p≤

s≤

cev≤63mm

cev>63mm

q345

b

0.20

0.50

1.70

0.035

0.035

0.44

0.47

c

0.18

0.50

1.70

0.030

0.030

0.44

0.47

d

0.18

0.50

1.70

0.030

0.025

0.44

0.47

e

0.18

0.50

1.70

0.025

0.020

0.44

0.47

note:  b, c, d, e grade z-direction performance steel plates can be provided.  if z-direction performance is required, the steel plate s content is to  be carried out according to the gb/t5313-85 standard. the z-direction  performance steel plate is marked with the z-direction level after the  steel number.
3.3 mechanical properties
table 2 mechanical properties

牌号

屈服强度rel,mpa, 不小于

抗拉强度rm,mpa

断后伸长率a,%≥

冲击功,j kv2,纵向

6~16

16~40

40~63

63~80

≤40

>40-80

q345b

345

335

325

315

470~630

20

19

20

34

q345c

21

20

0

q345d

21

20

-20

q345e

21

20

-40

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