Type of Galvannealed steel
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 quality340N 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 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 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
 
 
001