State Standard Specification

This standard is distributed to the lead sheets used in chemical mechanical engineering and other industries.

1. THE ASSORTMENT

1.1. Thickness, width, length of sheets and maximum deviations on thickness of sheets should correspond resulted in table 1.

Table 1

Thickness of a sheet Maximum deviation on thickness of a sheet Length of a sheet at width Theoretical weight 1 m .sq., kg
Normal accuracy
The raised accuracy
500
0,6
-0,07
-0,05
1000
6,82
0,8
-0,07
-0,05
1000
9,10
1,0
-0,10
-0,08
1000
11,37
1,5
-0,15
-0,12
1000
17,06
2,0
-0,15
-0,12
1000
22,74
2,5
-0,20
-0,16
1000
28,42
3,0
-0,20
-0,16
1000
34,11
3,5
-0,20
-0,16
1000
39,80
4,0
-0,20
-0,18
1000
45,48
4,5
-0,20
-0,18
1000
50,03
5,0
-0,20
-0,18
1000
56,85
6,0
-0,30
-0,25
1000
68,22
7,0
-0,30
-0,25
1000
79,60
8,0
-0,30
-0,25
1000
90,96
9,0
-0,50
-0,30
1000
102,33
10,0
-0,50
-0,30
1000
113,70
12,0
-0,50
-0,40
1000
136,40
15,0
-0,50
-0,40
1000
170,60

1.2. Maximum deviations on width and length of sheets should not exceed (-5;-10) mm for sheets of normal accuracy; (+-5) mm for sheets of the raised accuracy.

2. TECHNICAL REQUIREMENTS.

2.1. Sheets produce in conformity with requirements of this standard on the production schedules authorized when due hereunder, from lead of marks N0, N1, N2 and in accordance with GOST 3778-77.

 

A desig- nation of marks

A chemical compound, %
Lead not less
A mass fraction of impurity, no more
Silver
Copper
Zinc
Bismuth
Arsenic
Tin
Antimony
Iron

Magne- sium, calcium and sodium in the sum

In total normalized impurity
N0
99,992
0,00003
0,00005
0,001
0,004
0,00005
0,00005
0,00005
0,001
0,002
0,008
N1N
99,99
0,001
0,001
0,001
0,005
0,0005
0,0005
0,001
0,001
0,002
0,01
N1
99,985
0,001
0,001
0,001
0,006
0,0005
0,0005
0,001
0,001
0,002
0,015
N2N
99,97
0,002
0,001
0,001
0,02
0,001
0,001
0,001
0,001
0,003
0,08
N2
99,95
0,002
0,001
0,001
0,03
0,002
0,002
0,005
0,002
0,010
0,05
N3
99,90
0,002
0,002
0,001
0,06
0,003
0,002
0,005
0,005
0,020
0,1
N3N
99,50
0,01
0,09
0,07
0,15
0,05
0,10
0,20
0,01
-------
0,50