化学成分：
|
牌号
|
C
|
Si
|
Mn
|
P
|
S
|
Cu
|
Nb
|
B
|
|
DB590L
|
≤0.10
|
≤0.40
|
≤1.80
|
≤0.025
|
≤0.015
|
≤0.35
|
≤0.06
|
≤0.003
|
