牌號
|
化學(xué)成分(質(zhì)量分?jǐn)?shù))(%)
|
|||||||
C
|
P
|
S
|
Mn
|
si
|
Ni
|
A1
|
Cr
|
|
≤O.04
|
≤0.020
|
≤0.020
|
≤O.40
|
≤O.30
|
29.5~30.5
|
|
|
|
1J31
|
30.5~31.5
|
|
|
|||||
1J32
|
31.5~32.5
|
|
|
|||||
1J33
|
≤O.05
|
≤O.30~O.60
|
O.30~0.60
|
32.8~33.8
|
1.00~2.00
|
|
||
1J38
|
0.15~0.30
|
37.5~38.5
|
|
12.5~13.5
|
朝展牌 號
|
1J30、1J31、1J32、1J33
|
1J38
|
密度/(g/cm3)
|
8.1
|
8.15
|
朝展
牌號 |
在磁場強(qiáng)度為8000A/m時(shí),不同溫度下
的磁感應(yīng)強(qiáng)度B/T
|
磁感應(yīng)強(qiáng)度降落差/T
|
||||||
一20℃
|
20℃
|
40℃
|
60℃
|
80℃
|
B-20℃
~B20℃
|
B20℃~
B40℃
|
B20℃~
B80℃
|
|
0.40~0.60
|
0.20~0.45
|
|
0.02~O.13
|
|
|
|
|
|
1J31
|
0.60~0.85
|
0.40~0.65
|
|
O.15~
0.45
|
|
|
|
|
lJ32
|
0.80~1.10
|
0.60~0.95
|
|
0.40~0.75
|
|
|
|
|
1J33
|
|
0.40~O.70
|
|
|
0.10~0.40
|
|
|
0.22~0.42
|
0.25~0.42
|
0.05~0.24
|
O.015
~0.12
|
|
|
0.16
~0.24
|
0.035
~0.15
|
|