JIS G3302 is the production standard for Japanese galvanized coil strips. For galvanized coils, a thin steel plate is immersed in a molten zinc bath to adhere a layer of zinc to the surface. It is mainly produced by the continuous galvanizing process, that is, the rolled steel plate is continuously immersed in a plating bath containing molten zinc to form galvanized steel plate; alloyed galvanized steel plate.
This Standard specifies requirements for hot-dip zinc-coated steel sheets (hereafter referred to as sheets), steel strips (hereafter referred to as coils), and corrugated steel sheets manufactured by processing sheets into the shapes and dimensions specified in JIS G 3316 (hereafter referred to as corrugated sheets).
JIS G3302 Equivalent
Chinese standard: GBT 2518-2008
European standard: EN10147
American standard: ASTM A653M
What is SGCC Steels?
SGCC steel is a soft forming quality hot dip galvanized steel. SGCC is a material grade and designation defined in JIS G 3302 standard. JIS G 3302 is a Japanese material standard for hot dip galvanized steels. The commercial quality hot dip galvanized steel is a type of steel that can be made after galvanizing a coil of SPCC cold rolled material. The Zinc coating thickness is based on the thickness and width and is governed by JIS G 3302.
JIS G3302 Specification
Based on Hot-roll Steel Sheet:
Grade
Thickness Range(mm)
Application
SGHC
1.60 ~ 6.00
Commercial
SGH340
High strength commercial
SGH400
SGH440
SGH490
SGH540
For those with a nominal thickness of 1.6 mm or over up to and in cluding 3.2 mm, unless the use of hot-rolled base metal is specifically required, the cold-reduced base metal which satisfies the specifications for hot-rolled base metal may be used.
Based on Cold-roll Sheet:
Grade
Nominal Thickness
Application
SGCC
0.25 ~ 3.2
Commercial
SGCH
0.11 ~ 1.0
Commercial Hard
SGCD1
0.40 ~ 2.3
Drawing, Class 1
SGCD2
Drawing, Class 2
SGCD3
0.60 ~ 2.3
Drawing, Class 3
SGCD4
0.60 ~ 2.3
Drawing, Class 4
SGC340
0.25 ~ 3.2
Structural Quality
SGC400
SGC440
SGC490
SGC570
0.25 ~ 2.0
JIS G3302 Chemical Composition
Based on Hot-Roll Sheet(units:%):
Grade
C
Mn
P
S
SGHC
0.15max.
0.80max.
0.05max.
0.05max.
SGH340
0.25max.
1.70max.
0.20max.
0.05max.
SGH400
0.25max.
1.70max.
0.20max.
0.05max.
SGH440
0.25max.
2.00max.
0.20max.
0.05max.
SGH490
0.30max.
2.00max.
0.20max.
0.05max.
SGH540
0.30max.
2.50max.
0.20max.
0.05max.
Based on Cold-Roll Sheet (units:%):
Grade
C
Mn
P
S
SGCC
0.15 max.
0.80 max.
0.05 max.
0.05 max.
SGCH
0.18 max.
1.20 max.
0.80 max.
0.05 max.
SGCDl
0.12 max.
0.60 max.
0.04 max.
0.04 max.
SGCD2
0.10 max.
0.45 max.
0.03 max.
0.03 max.
SGCD3
0.08 max.
0.45 max.
0.03 max.
0.03 max.
SGC340
0.25 max.
1.70 max.
0.20 max.
0.05 max.
SGC400
0.25 max.
1.70 max.
0.20 max.
0.05 max.
SGC440
0.25 max.
2.00 max.
0.20 max.
0.05 max.
SGC490
0.30 max.
2.00 max.
0.20 max.
0.05 max.
SGC570
0.30 max.
2.50 max.
0.20 max.
0.05 max.
JIS G3302 Mechanical properties
Tensile test characteristics
Based on Hot-Roll Sheet(units:%):
Grade
Yield strength
Tensile strength
Elongation %
N/mm2
N/mm2
Thickness
1.6-2.0MM
2.0-2.5MM
2.5-3.2MM
3.2-4.0MM
4.0-6.0MM
SGHC
–
–
–
–
–
–
–
SGH340
245 Min
340 Min
20 Min
20 Min
20 Min
20 Min
20 Min
SGH400
295 Min
400 Min
18 Min
18 Min
18 Min
18 Min
18 Min
SGH440
335 Min
440 Min
18 Min
18 Min
18 Min
18 Min
18 Min
SGH490
365 Min
490 Min
16 Min
16 Min
16 Min
16 Min
16 Min
SGH540
400 Min
540 Min
16 Min
16 Min
16 Min
16 Min
16 Min
NOTE 1 For SGHC, a yield point or proof stress of 205 N/mm2 or over and a tensile strength of 270 N/mm2 or over may be used.
NOTE 2 1 N/mm2 = 1 MPa
Based on Cold-Roll Sheet (units:%):
Grade
Yield strength
Tensile strength
Elongation %
N/mm2
N/mm2
Thickness
0.25-0.4MM
0.4-0.6MM
0.6-1.0MM
1.0-1.6MM
1.6-2.5MM
SGCC
–
–
–
–
–
–
–
SGCH
–
–
–
–
–
–
–
SGCD1
–
270 Min
32 Min
34 Min
36 Min
37 Min
38 Min
SGCD2
–
270 Min
–
36 Min
38 Min
39 Min
40 Min
SGCD3
–
270 Min
–
–
40 Min
41 Min
42 Min
SGCD4
–
270 Min
–
–
43 Min
43 Min
44 Min
SGC340
245 Min
340 Min
20 Min
20 Min
20 Min
20 Min
20 Min
SGC400
295 Min
400 Min
18 Min
18 Min
18 Min
18 Min
18 Min
SGC440
335 Min
440 Min
18 Min
18 Min
18 Min
18 Min
18 Min
SGC490
365 Min
490 Min
16 Min
16 Min
16 Min
16 Min
16 Min
SGC570
560 Min
570 Min
–
–
–
–
–
NOTE 1 For SGCC, a yield point or proof stress of 205 N/mm2 or over and a tensile strength of 270 N/mm2 or over may be used.
NOTE 2 SGCH, not subjected to annealing, usually have a Rockwell hardness of 85 HRBW or over, or a Vickers hardness of 170 HV or over.
NOTE 3 1 N/mm2 = 1 MPa Note a) The sheets and coils of SGCD4 shall be free from stretcher strain marks when being formed, for a period of six months after manufacture.
Thickness Tolerances
Tolerances on product thickness (applicable to SGHC)
Thickness
(MM)
Width (MM)
Under 1200
1200-1500
1500-1800
1800-2300
1.6-2.0
0.17
0.18
0.19
0.22
2.0-2.5
0.18
0.20
0.22
0.26
2.5-3.15
0.20
0.22
0.25
0.27
3.15-4.0
0.22
0.24
0.27
0.28
4.0-5.0
0.25
0.27
–
–
5.0-6.0
0.27
0.29
–
–
Above 6.0
0.30
0.31
–
–
Tolerances on product thickness (applicable to SGH340,SGH400,SGH440,SGH490 and SGH540)
Thickness
(MM)
Width (MM)
Under 1600
1600-2000
1.6-2.0
0.20
0.24
2.0-2.5
0.21
0.26
2.5-3.15
0.23
0.30
3.15-4.0
0.25
0.35
4.0-5.0
0.46
–
5.0-6.0
0.51
–
Tolerances on product thickness (applicable to SGCCSGCH,SGCD1 to SGCD4 and SGC340 to SGC570)
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