Galvanized Steel
Galvanized steel plate is immersed in molten zinc liquid to form zinc layer protection and improve corrosion resistance and durability. Commonly used in construction, automotive and other fields.
JIS G3302
Hot-dip zinc-coated steel sheet and strip
Galvanized sheet has always been an indispensable material in automobile manufacturing. It is mainly used in automobile shell, body plate and body structure and other parts, its excellent anti-corrosion performance and high strength make galvanized sheet become one of the important materials in automobile manufacturing.
| Grade symbol |
Yield point or proof stress
N/mm2 |
Tensile strength
N/mm2 |
Elongation % | Test piece and direction of tensile test | ||||
|---|---|---|---|---|---|---|---|---|
|
Nominal thickness
mm |
||||||||
|
1.6 or over to and
excl. 2.0 |
2.0 or over to and
excl. 2.5 |
2.5 or over to and
excl. 3.2 |
3.2 or over to and
excl. 4.0 |
4.0 or over up to and
incl. 6.0 |
||||
| SGHC | (205) min | (270 min.) | – | – | – | – | – | No.5 in rolling direction |
| SGH340 | 245 min. | 340 min. | 20 min. | 20 min. | 20 min. | 20 min. | 20 min. |
No.5 in rolling direction or
perpendicular to the rolling direction |
| SGH400 | 295 min. | 400 min. | 18 min. | 18 min. | 18 min. | 18 min. | 18 min. | |
| SGH440 | 335 min. | 440 min. | ||||||
| SGH490 | 365 min. | 490 min. | 16 min. | 16 min. | 16 min. | 16 min. | 16 min. | |
| SGH540 | 400 min. | 540 min. | ||||||
NOTE 1. 1 N/mm2 = 1 MPa
NOTE 2. Values in parentheses are shown for reference.
| Grade symbol |
Yield point or proof stress
N/mm2 |
Tensile strength
N/mm2 |
Elongation % | Test piece and direction of tensile test | |||||
|---|---|---|---|---|---|---|---|---|---|
|
Nominal thickness
mm |
|||||||||
|
0.25 or over to and
excl. 0.40 |
0.40 or over to and
excl. 0.60 |
0.60 or over to and
excl. 1.0 |
1.0 or over to and
excl. 1.6 |
1.6 or over to and
excl. 2.5 |
2.5 or over | ||||
| SGCC | (205) min | (270) min | – | – | – | – | – | – | No. 5 in rolling direction |
| SGCHa) | – | – | – | – | – | – | – | – | |
| SGCD1 | – | 270 min. | – | 34 min. | 36 min. | 37 min. | 38 min. | – | |
| SGCD2 | – | 270 min. | – | 36 min. | 38 min. | 39 min. | 40 min. | – | |
| SGCD3 | – | 270 min. | – | 38 min. | 40 min. | 41 min. | 42 min. | – | |
| SGCD4b) | – | 270 min. | – | 40 min. | 42 min. | 43 min. | 44 min. | – | |
| SGC340 | 245 min. | 340 min. | 20 min. | 20 min. | 20 min. | 20 min. | 20 min. | 20 min. |
No. 5 in rolling direction or
perpendicular to the rolling direction |
| SGC400 | 295 min. | 400 min. | 18 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. | 18 min. | |
| SGC490 | 365 min. | 490 min. | 16 min. | 16 min. | 16 min. | 16 min. | 16 min. | 16 min. | |
| SGC570 | 560 min. | 570 min. | – | – | – | – | – | – | |
NOTE 1. Values in parentheses are shown for reference.
NOTE 2. 1 N/mm2 = MPa
Notesa) SGCH is a material not subjected to annealing, usually having a Rockwell hardness of 85 HRB or more or a Vickers hardness of 170 HV or more (the test load may be chosen appropriately).
b) For the sheet and coil of SGCD4, the stretcher strain shall not be generated when working is performed during six months after manufacturing.
| Classified symbol | C % | Mn % | P % | S % |
|---|---|---|---|---|
| SGHC | 0.15 max. | 0.80 max. | 0.05 max. | 0.05 max. |
| SGH340 | 0.25 max. | 1.70 max. | 0.20 max. | 0.05 max. |
| SGH400 | 0.25 max. | 1.70 max. | 0.20 max. | 0.05 max. |
| SGH440 | 0.25 max. | 2.00 max. | 0.20 max. | 0.05 max. |
| SGH490 | 0.30 max. | 2.00 max. | 0.20 max. | 0.05 max. |
| SGH540 | 0.30 max. | 2.50 max. | 0.20 max. | 0.05 max. |
Remarks: The report of cast analysis of C, Mn, P and S shall be in accordance with the agreement between the purchaser and the supplier.
| Classified symbol | 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. |
| SGCD1 | 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. | 0.02 max. | 0.05 max. |
| SGC400 | 0.25 max. | 1.70 max. | 0.02 max. | 0.05 max. |
| SGC440 | 0.25 max. | 2.00 max. | 0.02 max. | 0.05 max. |
| SGC490 | 0.30 max. | 2.00 max. | 0.02 max. | 0.05 max. |
| SGC570 | 0.30 max. | 2.50 max. | 0.02 max. | 0.05 max. |
Remarks: The report of cast analysis of C, Mn, P and S shall be in accordance with the agreement between the purchaser and the supplier.