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GB8729-88 铸造焦标准
名称
级别
特级
一级
二级
块度mm
>80
80-60
>60
水分M
t
%≯
5.0
5.0
5.0
灰份A
d.
%
≤8.0
8.01-10.0
10.01-12.0
挥发份 V
daf,
%≯
1.5
1.5
1.5
硫份 S
t,d
%≯
0.6
0.8
0.8
转鼓强度M
40
%≮
85.0
81.0
77.0
落下强度SI
10
40
%≯
92.0
88.0
84.0
显气孔率P
s
%≯
40
45
45
碎焦率(<40mm)%≯
4.0
4.0
4.0
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