JIS G3302
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)
| Thickness
MM |
Width
MM |
| Under 630 |
630-1000 |
1000-1250 |
1250-1600 |
Over 1600 |
| Under 0.25 |
0.04 |
0.04 |
0.04 |
– |
– |
| 0.25-0.40 |
0.05 |
0.05 |
0.05 |
0.06 |
– |
| 0.40-0.60 |
0.06 |
0.06 |
0.06 |
0.07 |
0.08r44 |
| 0.60-0.80 |
0.07 |
0.07 |
0.07 |
0.07 |
0.08 |
| 0.80-1.00 |
0.07 |
0.07 |
0.08 |
0.09 |
0.10 |
| 1.00-1.25 |
0.08 |
0.08 |
0.09 |
0.10 |
0.12 |
| 1.25-1.60 |
0.09 |
0.10 |
0.11 |
0.12 |
0.14 |
| 1.60-2.00 |
0.11 |
0.12 |
0.13 |
0.14 |
0.16 |
| 2.00-2.50 |
0.13 |
0.14 |
0.15 |
0.16 |
0.18 |
| 2.50-3.15 |
0.15 |
0.16 |
0.17 |
0.18 |
0.21 |
| 3.15-3.20 |
0.17 |
0.18 |
0.20 |
0.21 |
– |
