Type of Galvanized steel
Specification designation
 



 
Type of Galvanized steel
  Table.1-1 Type of Galvanized steel
Type
Nisshin Symbol
JIS Symbol
Cold rolled steel
Hot rolled steel
Cold rolled steel
Hot rolled
steel
Commercial quality
C
C
SGCC
SGHC
Drawing quality
Drawing quality I (JIS)
D
‚¢
SGCD1
-
Deep drawing quality
Drawing quality II (JIS)
E
-
SGCD2
-
Extra-deep drawing quality
Drawing quality III (JIS)
U
-
SGCD3
-
Structural quality 340N grade
K340
K340
SGC340
SGH340
400N grade
K400
K400
SGC400
SGH400
440N grade
K440
K440
SGC440
SGH440
490N grade
K490
K490
SGC490
SGH490
540N grade
‚¢
‚¢
-
SGH540*
570N grade
‚¢
‚¢
SGC570*
-
*Ask Nisshin-steel
 
Table.1-2 Type of Galvanized steel sheet (ASTM Standard)
Type
Symbol
(Cold rolled steel)
Symbol
(Hot rolled steel)
I-P unit
SI unit
I-P unit
SI unit
Commercial quality
CQ
CQ
Lock Form quality
LFQ
LFQ
Drawing quality
DQ
-
Deep drawing quality
DQSK
-
Structural qualityGrade 33
Grade 230
SQ33
SQ230
SQ33
SQ230
Grade 37
Grade 255
SQ37
SQ255
SQ37
SQ255
Grade 40
Grade 275
SQ40
SQ275
SQ40
SQ275
Grade 50 Class 1
Grade 340 Class 1
SQ50
SQ340
-
 
Post treatment
  Table.2 Post treatment of Galvanized steel sheet
Post treatment type
Nisshin Symbol
JIS Symbol
ASTM Symbol
Oil
MO
MO
MO
Chromate
C
CX
C
Chromate and oil
CO
CO
CO
Corrosion resistant Chromate
A
-
S
Resin coating
U
-
-
Lubricate resin coating
J
-
-
   
Coating Mass
  Table.3-1 Coating Mass of Galvanized steel sheet (Nisshin Standard)
Mass Symbol
Minimum mass
on both sides
(g/m²)
Standard coating mass
on both sides
(g/m²)
Corresponding
coating thickness
on one side (µm)
45
70
90
6.3
60
90
120
8.7
90
140
180
13
120
190
240
17
150
230
300
22
190
290
380
27
300
500
600
43
Note 1.
Minimum mass on both sides is an average obtained by the triple-spot test.
2.
Corresponding coating thickness means the total thickness of coating on both sides corresponding to the standard coating mass.
   
  Table.3-2 Coating Mass of Galvanized steel sheet (JIS Standard)
Mass
Symbol
Minimum mass
on both sides
/3-spot test
(g/m²)
Minimum mass
on both sides
/1-spot test
(g/m²)
Standard coating mass
on both sides
(g/m²)
Corresponding
coating thickness

(µm)
(Z06)
(60)
(51)
(90)
13
Z08
80
68
120
17
Z10
100
85
150
21
Z12
120
102
183
26
Z18
180
153
244
34
Z20
200
170
285
40
Z22
220
187
305
43
Z25
250
213
305
49
Z27
275
234
381
54
Z35
350
298
458
64
Z45
450
383
565
80
Z60*
600
510
722
102
Note Corresponding coating thickness means the total thickness of coating on both sides corresponding to the standard coating mass.
   
  Table.3-3 Coating Mass of Galvanized steel sheet (ASTM Standard)
Mass
Symbol
Minimum mass
on both sides
/3-spot test
(ox/ft²)
Minimum mass
on both sides
/1-spot test
(ox/ft²)
Minimum mass
on one side
/3-spot test
(ox/ft²)
G01
not define
G30
0.30
0.25
0.10
G40
0.40
0.30
0.12
G60
0.60
0.50
0.20
G90
0.90
0.80
0.31
G115
1.15
1.00
0.40
G140
1.40
1.20
0.48
G165
1.65
1.40
0.56
G185
1.85
1.60
0.64

Mass
Symbol
Minimum mass
on both sides
/3-spot test
(g/m²)
Minimum mass
on both sides
/1-spot test
(g/m²)
Minimum mass
on one side
/3-spot test
(g/m²)
Z001
not define
Z120
120
90
36
Z180
180
150
60
Z275
275
235
94
Z350
350
300
120
Z450
450
385
154
 
Example of designation
 

 
001