| Specification designation |
| |  |
| |
| Type of Galvannealed steel |
| | Table.1-1 Type of Galvannealed
steel sheet
| 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 |
a |
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 | a |
a |
- | SGH540* |
| 570N grade | a |
a |
SGC570* | - |
*Ask Nisshin-steel |
| | |
| | Table.1-2 Type of Galvannealed
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 Galvannealed 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 |
|
| |
| Coating
Mass |
| | Table.3-1 Coating
Mass of Galvannealed steel sheet (Nisshin Standard)
| Mass
Symbol |
Minimum mass
on both sides
(g/m²)
| Standard coating
mass
on both sides
(g/m²) | Corresponding
coating thickness
(µm) | | 30 |
40 | 60 |
4 | | 45 |
60 | 90 |
6.3 | | 60 |
80 | 120 |
8.7 | | 90 |
120 | 180 |
13 |
| 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 Galvannealed
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) | (F04) |
40 | 34 |
60 | 8 |
F06 |
60 | 51 |
90 | 13 |
F08 |
80 | 68 |
120 | 17 |
F10 |
100 | 85 |
150 | 21 |
F12 |
120 | 102 |
183 | 26 |
(F18) |
180 | 153 |
244 | 34 |
|
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 Galvannealed 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) | | A01 |
not define | |
A25 | 0.25 |
0.20 | 0.08 |
| A40 | 0.40 |
0.30 | 0.12 |
| A60 | 0.60 |
0.50 | 0.20 |
|
| | |
| |
| 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) |
| ZF001 |
not define | |
ZF75 | 75
| 60 |
24 | | ZF120
| 120 |
90 | 36 |
| ZF180 | 180 |
150 | 60 |
|
| |
| Example
of designation |
| |  |
