| 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
quality | Grade 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 |
| |
|
