|
元素
|
规定化学成分
上限值
|
允许偏差
|
|
|
上偏差
|
下偏差
|
||
|
C
|
≤0.30
|
0.01
|
0.01
|
|
>0.30~0.75
|
0.02
|
0.02
|
|
|
>0.75
|
0.03
|
0.03
|
|
|
Mn
|
≤1.00
|
0.03
|
0.03
|
|
>1.00~2.00
|
0.04
|
0.04
|
|
|
>2.00~3.00
|
0.05
|
0.05
|
|
|
>3.00
|
0.10
|
0.10
|
|
|
Si
|
≤0.37
|
0.02
|
0.02
|
|
>0.37~1.50
|
0.04
|
0.0
|
|
|
>1.50
|
0.05
|
0.05
|
|
|
Ni
|
≤1.00
|
0.03
|
0.03
|
|
>1.00~2.00
|
0.05
|
0.05
|
|
|
>2.00~5.00
|
0.07
|
0.07
|
|
|
>5.00
|
0.10
|
0.10
|
|
|
Cr
|
≤0.90
|
0.03
|
0.03
|
|
>0.90~2.10
|
0.05
|
0.05
|
|
|
>2.10~5.00
|
0.10
|
0.10
|
|
|
>5.00
|
0.15
|
0.15
|
|
|
Mo
|
≤0.30
|
0.01
|
0.01
|
|
>0.30~0.60
|
0.02
|
0.02
|
|
|
>0.60~1.40
|
0.03
|
0.03
|
|
|
>1.40~6.00
|
0.05
|
0.05
|
|
|
>6.00
|
0.10
|
0.10
|
|
|
V
|
≤0.10
|
0.01
|
-
|
|
>0.10~0.90
|
0.03
|
0.03
|
|
|
>0.90
|
0.05
|
0.05
|
|
|
W
|
≤1.00
|
0.04
|
0.04
|
|
>1.00~4.00
|
0.08
|
0.08
|
|
|
>4.00~10.00
|
0.10
|
0.10
|
|
|
>10.00
|
0.20
|
0.20
|
|
|
Al
|
≤0.10
|
0.01
|
-
|
|
>0.10~0.70
|
0.03
|
0.03
|
|
|
>0.70~1.50
|
0.05
|
0.05
|
|
|
>1.50
|
0.10
|
0.10
|
|