|
牌号
|
化学元素（质量分数）/%
|
||||||||||
|
C
|
Si
|
Mn
|
Cr
|
Ni
|
Mo
|
Nb
|
V
|
P
|
S
|
Alt
|
|
|
Q245R
|
≤0.20
|
≤0.35
|
0.50-1.00
|
≤0.025
|
≤0.015
|
≥0.020
|
