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Prepainted Galvanized Steel Sheet

When steel components are used to make more complex finished products, they can be galvanized before the product is assembled. This is called pre-galvanizing, or "pre-galvanizing". It may also be referred to as "in-line", "continuous" or "rolled" galvanizing.

Product Introduction

Product Parameters

Product NamePrepainted Galvanized Steel Sheet
Thickness0.12mm-6.00mm
Width600mm-1500mm
Length1m-12m, Support Customization
StandardAISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Zinc Layer Hot Galvanizing: 60-275g/m²
Pre-galvanized: 80-275g/m²

Chemical Composition

Category Standard Grade C Si Mn P S Ti
For cold formingChinese StandardDX51D+Z0.120.500.600.1000.0450.30
For cold formingChinese StandardDX52D+Z0.120.500.600.1000.0450.30
For cold formingChinese StandardDX53D+Z0.120.500.600.1000.0450.30
For cold formingChinese StandardDX54D+Z0.120.500.600.1000.0450.30
For cold formingChinese StandardDX56D+Z0.120.500.600.1000.0450.30
For cold formingChinese StandardDX57D+Z0.120.500.600.1000.0450.30
For cold formingJapanese StandardSGCC0.150.500.800.0500.0300.025
For cold formingJapanese StandardSGCD10.120.500.600.0400.0300.025
For cold formingJapanese StandardSGCD20.100.500.450.0300.0300.025
For cold formingJapanese StandardSGCD30.080.500.450.0300.0300.025
For cold formingJapanese StandardSGCD40.060.500.450.0300.0300.025
For structureJapanese StandardSGC3400.250.501.700.2000.0350.025
For structureJapanese StandardSGC4000.250.501.700.2000.0350.150
For structureJapanese StandardSGC4400.250.502.000.2000.0350.150
For structureJapanese StandardSGC4900.300.502.000.2000.0350.025
For structureJapanese StandardSGC5100.300.502.500.2000.0350.025
For structureAISI StandardS220GD+Z0.200.600.700.1000.0450.025
For structureAISI StandardS250GD+Z0.200.600.700.1000.0450.025
For structureAISI StandardS280GD+Z0.200.600.700.1000.0450.025
For structureAISI StandardS320GD+Z0.200.600.700.1000.0450.025
For structureAISI StandardS350GD+Z0.200.600.700.1000.0450.150
For structureAISI StandardS550GD+Z0.200.600.700.1000.0450.150

Mechanical Properties

Grade Yield Strength (MPa) ≥ Tensile Strength (MPa) ≥ Elongation A% ≥
DX51D Z/ZM/AZ/AM240-380270-50022
DX52D Z/ZM/AZ/AM140-300270-42026
DX53D Z/ZM/AZ/AM140-260270-38030
DX54D Z/ZM/AZ/AM120-220260-35036
S220GD Z/ZM/AM22030020
S250GD Z/ZM/AZ/AM25033019
S280GD Z/ZM/AM28036018
S300GD A/AM30038018
S320GD Z/ZM/AM32039017
S350GD Z/ZM/AZ/AM35042016
S450GD A/AM45048015
S550GD Z/ZM/AZ/AM550550-

Galvanized Surface Selection

Zero Spangle Minimized Spangle Normal Spangle Large Spangle
       

Use of The Environment

Use of The Environment Recommended Zinc Thickness
Indoor UseZ10 or Z12 (100g/㎡ or 120g/㎡)
SuburbsZ20 and Painting (200g/㎡)
Urban or Industrial AreaZ27 (270g/㎡) or G90 (US Standard) and painted
Coastal AreaThicker than Z27 (270g/㎡) or G90 (US Standard) and painted
Punch or Deep Drawing ApplicationThicker than Z27 (270g/㎡) or G90 (US Standard), avoid coating peeling after stamping

Surface Treatment Type

Surface Treatment Type Code Features
Chromic Acid TreatmentCGood corrosion resistance, suitable for bare state
Chromic Acid Treatment + OilingSGood corrosion resistance
Phosphoric Acid Treatment (Including Sealing Treatment)PHave a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Including Sealing Treatment) + OilingQHas a certain corrosion resistance, good paint performance, prevent rust during transportation and storage
Phosphoric Acid Treatment (Excluding Sealing Treatment)THave a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Excluding Sealing Treatment) + OilingVHas a certain corrosion resistance, good paint performance, and prevent rust
OilingOPrevent rust during transportation and storage
No TreatmentMSuitable 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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