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G90 Galvanized Coil
G90 refers to the coating type and coating weight on the steel coil. "G" means that the coating is galvanized. Meanwhile, the number "90" represents the weight of zinc on the steel. G90 galvanized steel is hot-dip galvanized cold-rolled steel to improve durability.

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Email: hlgg@hualingsteel.com
Product Description

The coating designation G90 represents the type of coating and the weight of the applied coating. The letter "G" indicates that the coating is galvanized, meaning zinc-based. Meanwhile, the number "90" represents the thickness of zinc on the surface of the steel coil. Galvanized steel coil is covered with a zinc coating to provide corrosion resistance. The G90 protective coating prevents moisture from reaching the steel structure, thereby improving the corrosion resistance of the steel. This can extend the life expectancy of the steel. G90 is the large coat weight and therefore provides strong protection.


Product Name

Galvanized Coil

Thickness

0.12mm-3.5mm

Width

600mm-1500mm

Length

508mm/610mm, Support Customization

Standard

AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.

Zinc Layer

Hot Galvanizing: 60-275g/m²

Pre-galvanized: 80-275g/m²


Chemical Composition

Standard

Grade

C

Si

Mn

P

S

Ti

Forcold Forming

Chinese Standard

DX51D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX52D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX53D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX54D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX56D+Z

0.12

0.50

0.60

0.100

0.045

0.30

DX57D+Z

0.12

0.50

0.60

0.100

0.045

0.30

Forcold Forming

Japanese Standard

SGCC

0.15

0.50

0.80

0.050

0.030

0.025

SGCD1SGCD2

0.120.10

0.500.50

0.600.45

0.0400.030

0.0300.030

0.0250.025

SGCD3

0.08

0.50

0.45

0.030

0.030

0.025

SGCD4

0.06

0.50

0.45

0.030

0.030

0.025

For Structure

Japanese Standard

SGC340

0.25

0.50

1.70

0.200

0.035

0.025

SGC400SGC440

0.250.25

0.500.50

1.702.00

0.2000.200

0.0350.035

0.1500.150

SGC490

0.30

0.50

2.00

0.200

0.035

0.025

SGC510

0.30

0.50

2.50

0.200

0.035

0.025

For Structure

AISI Standard

S220GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S250GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S280GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S320GD+Z

0.20

0.60

0.70

0.100

0.045

0.025

S350GD+Z

0.20

0.60

0.70

0.100

0.045

0.150

S550GD+Z

0.20

0.60

0.70

0.100

0.045

0.150


Mechanical Properties

Grade

Yield Strength MPa≥

Tensile Strength MPa≥

Elongation A%≥

DX51D Z/ZM/AZ/AM

240-380

270-500

22

DX52D Z/ZM/AZ/AM

140-300

270-420

26

DX53D Z/ZM/AZ/AM

140-260

270-380

30

DX54D Z/ZM/AZ/AM

120-220

260-350

36

S220GD Z/ZM/AM

220

300

20

S250GD Z/ZM/AZ/AM

250

330

19

S280GD Z/ZM/AM

280

360

18

S300GD A/AM

300

380

18

S320GD Z/ZM/AM

320

390

17

S350GD Z/ZM/AZ/AM

350

420

16

S450GD A/AM

450

480

15

S550GD Z/ZM/AZ/AM

550

550

-


Galvanized Surface Selection

E6D945D1-824F-4CD4-9668-7A5FBD9C4B0C

Title 1


B915FBBC-7F83-49EF-B53F-18EA30CE8D21

Title 2


44D1EAFE-F28D-47E7-929F-1071AE48B58C

Title 3


5F4EB32F-6359-4638-9754-A3744AFFAE38

Title 4


Use of The Environment

Recommended Zinc Thickness

Indoor Use

Z10 or Z12 (100g/㎡or 120g/㎡)

Suburbs

Z20 and Painting (200g/㎡)

Urban or Industrial Area

Z27 (270g/㎡) or G90 (US Standard) and painted

Coastal Area

Thicker than Z27 (270g/㎡) or G90 (US Standard) and painted

Punch or Deep Drawing Application

Thicker than Z27 (270grams/㎡) or G90 (US Standard) avoid coating peeling after stamping


Surface Treatment Type

Code

Features

Chromic Acid Treatment

C

Good corrosion resistance, suitable for bare state

Chromic Acid Treatment+Oiling

S

Good corrosion resistance

Phosphoric Acid Treatment (Including Sealing Treatment)

P

Have a certain corrosion resistance, good paint performance

Phosphoric Acid Treatment (Including Sealing Treatment)+Oiling

Q

Has a certain corrosion resistance, good paint performance, prevent rust during transportation and storage

Phosphoric Acid Treatment (Excluding Sealing Treatment)

T

Have a certain corrosion resistance, good paint performance

Phosphoric Acid Treatment (Excluding Sealing Treatment)+Oiling

V

Has a certain corrosion resistance, good paint performance, and prevent rust

Oiling

O

Prevent rust during transportation and storage

No Treatment

M

Suitable for immediate painting


Material Comparison

Chinese Standard

Japan Standard

European Standard

DX51D Z/DC51D Z (CR)

SGCC

DX51D Z

DX52D Z/DC52D Z

SGCD1

DX52D With

DX53D Z/DC53D Z/DX54D Z/DC54D Z

SGCD2/SGCD3

DX53D Z/DX54D Z

S220/250/280/320/350/550GD Z

SGC340/400/440/490/570

S220/250/280/320/350GD Z

DX51D Z/DD51D Z (HR)

SGHC

DX51D Z


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