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A Letter to Our Customers – Henan BaoWu Steel

Hi, manager.
Good day. Hope we can meet your business need. This is Melody from Shandong, China who commits to steel coil and sheet. Our products can be used to make roof , pipe and construction, etc.

How to Identify Baosteel Color-Coated Steel Sheets

Baosteel’s architectural color-coated steel sheets utilize the following substrates:

Hot-dip galvanized substrate, hot-dip aluminized-zinc substrate, galvanized aluminum-magnesium substrate.

Substrate requirements for Baosteel’s standard polyester (PE) color-coated sheets:

Hot-dip galvanized substrate must have a total zinc coating weight of 120 g/m² or higher on both sides (Z120);

Hot-dip aluminum-zinc coated substrate: total aluminum-zinc coating weight of 100 g/m² or more on both sides (AZ100);

Hot-dip zinc-aluminum-magnesium coated substrate: total zinc-aluminum-magnesium coating weight of 100 g/m² or more on both sides (AM100).

Base Material Requirements for Baosteel’s High Weatherability (HDP) Color-Coated Steel Sheets:

Hot-dip galvanized base material must have a total zinc coating weight of 180 g/m² or higher on both sides; Hot-dip galvanized aluminum-zinc substrate: total aluminum-zinc coating weight of 150 g/m² or more on both sides (AZ150); Hot-dip galvanized aluminum-magnesium substrate: total magnesium-aluminum-zinc coating weight of 150 g/m² or more on both sides (AM150).

Baosteel’s high-weathering color steel sheets offer a 15-year coating quality guarantee, ensuring the coating will not peel, chalk, crack, or fade within 15 years.

Available Specifications and Varieties of Baosteel Group’s Architectural Color-Coated Steel Sheets:

Coating Structure on the Back of Baosteel Color-Coated Steel Sheets:

Color-coated sheet inventory

Color-Coated Steel Sheet: The Color Revolution and All-Rounder in the Steel Industry

Color-coated steel sheet, the full name being color-coated steel sheet, is a composite material. It uses cold-rolled steel sheets, galvanized steel sheets, or aluminum sheets as the substrate. After surface pre-treatment, one or multiple layers of organic coatings are applied, followed by baking and curing. It is not merely simple steel but a modern industrial material that integrates protection, decoration, and functionality.

Substrate Layer: The Sturdy Internal Framework
The “skeleton” of a color-coated steel sheet is formed by different types of metal substrates:

• Cold-rolled substrate: Lower cost but relatively weaker corrosion resistance, typically used for indoor environments.
• Hot-dip galvanized substrate: The zinc layer provides sacrificial anode protection, significantly enhancing corrosion resistance.
• Aluminum-zinc coated substrate (Galvalume): Combines the weatherability of aluminum with the sacrificial protection of zinc, offering excellent comprehensive performance.
• Electro-galvanized substrate: Features a uniform and fine surface, suitable for high-end home appliances and electronic products.
• Aluminum sheet substrate: Lightweight with excellent corrosion resistance, suitable for special environments.

Coating System: The External Color and Protection
The coating is the “skin” of the color-coated steel sheet, typically including:

• Primer: Adheres directly to the substrate, providing anti-corrosion function and coating adhesion.
• Topcoat: Determines the final color, gloss, and weatherability performance.
• Backcoat: Provides additional protection for specific applications.
• Special coatings: Such as PVDF (Polyvinylidene Fluoride) fluorocarbon coatings, which offer super weatherability with a service life reaching 20-30 years.

Application Fields: The Ubiquitous “Color Steel”

Construction Field

• Industrial and Commercial Buildings: Roofing and exterior walls of factories, warehouses, supermarkets, and stadiums.
• Public Buildings: Decorative and maintenance structures for airports, stations, and hospitals.
• Residential Buildings: Light-gauge steel structure houses, prefabricated houses, and interior partitions.

Home Appliance and Electronics Industry
Refrigerators, washing machines, microwave ovens and other white goods housings; computer cases, server cabinets, and other electronic product housings.

Transportation
Automotive parts, containers, interior fittings for carriages, traffic noise barriers, etc.

Furniture and Interior Decoration
Office partitions, filing cabinets, shelves, ceiling panels, etc.

Other Fields
Billboards, solar panel backsheets, agricultural greenhouses, etc.

Introduction to Cold-Rolled Products of Baowu Steel

Baowu Steel “cold rolling” product line mainly produces high value-added products such as automotive plates, household appliance plates, tin-plated plates, color-coated plates, and electrical steel.

Baosteel hot-dip galvanized products

The thickness of hot-dip galvanized products ranges from 0.3 to 3.0mm, and the width is from 800 to 1800mm. The types of coatings include pure zinc coating and alloyed coating, and they can be supplied in equal thickness and differential thickness forms. The surface structures of regular products are smooth zinc flower, small zinc flower, zero zinc flower, and zinc-iron alloy. The surface treatment methods include oil coating, chromic acid passivation, chromic acid passivation plus oil coating, environmental-friendly passivation, environmental-friendly passivation plus oil coating, and environmental-friendly anti-fingerprint.
Baosteel’s hot-dip galvanized products are widely used in industries such as automobiles, home appliances, construction, and mechanical manufacturing.

Henan Baowu Group Galvanized Products Introduction

The coating types include pure zinc coating and alloyed coating, and they can be supplied in equal thickness and differential thickness forms; the surface structure of the conventional products: smooth zinc granules, small zinc granules, zero zinc granules and zinc-iron alloy: surface treatment methods: oil coating, chromic acid passivation, chromic acid passivation with oil coating, environmentally friendly passivation, environmentally friendly passivation with oil coating, environmentally friendly fingerprint-resistant. The thickness of the hot-dip galvanized products ranges from 0.3 to 3.0 mm, and the width is from 800 to 1800 mm.

Baowu Steel’s galvanized products are widely used in industries such as automobiles, home appliances, construction, and mechanical manufacturing.

Galvanized sheet process and common grades

I. Definition

Galvanized sheet, also known as galvanized steel sheet, refers to a layer of metallic zinc being plated on the surface of low-carbon steel base plates (such as cold-rolled sheets and hot-rolled sheets) to prevent the steel sheets from corroding and rusting.

II. Main Production Processes

According to the differences in galvanizing processes, they are mainly divided into two categories:

1.Hot-dip galvanizing

Feature:

The coating is relatively thick (typically 40-200 μm), with excellent corrosion resistance and a long service life (up to 20-50 years).

The surface features zinc granules (including large zinc granules, small zinc granules, and no zinc granules), and its aesthetic quality is relatively average.

The cost is relatively low and it is the most widely used galvanizing method.

Main standards: GB/T 2518, ASTM A653, JIS G3302.

2. Electro-galvanizing

Feature:

The coating is thin (typically 3-20 μm), uniform and smooth, with excellent surface quality.

The corrosion resistance is average and not as good as hot-dip galvanizing, but it is easy to undergo subsequent processing (such as painting, phosphating).

It has good processing formability and welding performance.

The cost is usually higher than that of hot-dip galvanizing.

Main standards: GB/T 15675, ASTM A879.

III.  Brand

Common grades (taking the Chinese standard as an example):

DC51D+Z (SGCC): Ordinary commercial-grade hot-dip galvanized sheet.

DC52D+Z (SGC340): Hot-dip galvanized sheet for mechanical clamping.

DC53D+Z (SGC490): The structure is made of hot-dip galvanized sheet.

DC54D+Z (SGC570): High-strength steel hot-dip galvanized sheet.

SECC: Commonly used grades of electro-galvanized sheet metal.

 

Product Recommendation

Silicon steel product packaging

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  Silicon steel, also known as electrical steel, can be divided into two major categories: oriented silicon steel and non-oriented silicon steel. Oriented silicon steel is produced through special processing techniques, where the body-centered cubic crystal lattice of the steel plate is aligned parallel to the rolling direction and the surface is parallel to the rolling surface, thus forming the GOSS structure. In contrast, the crystal grains of non-oriented silicon steel are generally arranged in a disordered structure. Therefore, oriented silicon steel is mainly used to manufacture transformers that operate in a stationary state and require anisotropy, while non-oriented silicon steel is mainly used to manufacture motors that operate in a running state and require isotropy.

Product Series

• High magnetic flux oriented silicon steel, also known as: HiB

• Ordinary grade oriented silicon steel, also known as: CGO

• Magnetic domain refined oriented silicon steel, also known as: Notched sheet

• High grade non-oriented silicon steel

• High efficiency non-oriented silicon steel

• New energy non-oriented silicon steel

Simple packaging：

 

To meet the requirements of close customers to ensure the quality of product transportation and storage

1. Plastic film, fully sealed
2. Waterproof kraft paper

3. Two straps, labels and lifting

 

Fine packaging

To meet the requirements oflong- distance customers andensure the quality of producttransportation and storage

1.inner and outer rust-proof paper

2.VCl film

3.inner and outer paper angleguard

4.inner and outer protectionboard

5. inner and outer angle guard6. bale belt (radial 4, axial 3)

Export packaging

Meet the requirements of marine transportation to ensure the quality of product transportation and storage

1. inner and outer rust-proofpaper

2.VCl film (strengthen rust-proof)

3. inner and outer paper angle

Guard

4.inner and outer protectionboard (strengthen rust-proof)

5. inner and outer angle guard6. bale belt (radial 4, axial 3)

What are the characteristics of 0.2mm grain-oriented silicon steel?

silicon production

0.2mm grain-oriented silicon steel is a kind of soft magnetic material commonly used in electrical equipment such as motors and transformers.

1. Basic Characteristics
   Thickness: 0.2mm. The thinner thickness helps to reduce eddy current losses.
   Non-oriented: The magnetic properties are basically the same in all directions, suitable for applications such as rotating motors.
   High magnetic permeability: It is easy to magnetize and demagnetize, improving energy efficiency.
   Low iron loss: It performs well in high-frequency applications, reducing energy loss.
2. Main Applications
   Motors: Such as household appliances, industrial motors, and electric vehicle drive motors.
   Transformers: Small transformers, high-frequency transformers, etc.
   Inductors and electromagnetic devices: Used in inductors and electromagnetic components in various electronic devices.

 

无取向电工钢对照表Unoriented Electrical Steel Comparison Table
厚度 /mm	中国GB/T 252 -1996	日本JISC2553 -2000	美国ASTM A677M-98a	IEC60404 -8-4	欧洲标准 钢种号	德国 DIN46400-1-88	俄罗斯ROCT 21427.2-83
0.35		35A210
	35W230	35A230		M230-35A5
	35W250	35A250	36F320M	M250-35A5	1.0800	V250-35A	2413
	35W270	35A270	36F342M	M270-35A5	1.0801	V270-35A	2412
	35W300	35A300	36F386M	M300-35A5	1.0803	V300-35A	2411
	35W330		36F408M	M330-35A5	1.0804	V330-35A
	35W360	35A360	36F452M	M360-35A5
	35W400
	35W440	35A440
0.50	50W230	50A230
	50W250	50A250		M250-50A5	1.0891
	50W270	50A270		M270-50A5	1.0806	V270-50A
	50W290	50A290	47F364M	M290-50A5	1.0807	V290-50A	2413
	50W310	50A310	47F397M	M310-50A5	1.0808	V310-50A	2412
	50W330		47F419M	M330-50A5	1.0809	V330-50A
	50W350	50A350	47F441M	M350-50A5	1.0810	V350-50A	2411
	50W400	50A400	47F529M	M400-50A5	1.0811	V400-50A	2312
	50W470	50A470	47F617M	M470-50A5	1.0812	V470-50A	2212
	50W540			M530-50A5	1.0813	V530-50A
	50W600	50A600		M600-50A5	1.0814	V600-50A	2112
	50W700	50A700	47F882M	M700-50A5	1.0815	V700-50A	2012
	50W800	50A800	47F992M	M800-50A5	1.0816	V800-50A	2111
	50W1000	50A1000		M1000-50A5			2011
	50W1300	50A1300

晶粒取向电工钢对照表Grain Orientation Electrical Steel Comparison Table
厚度/mm	中国GB/T 252-1996	日本JIS C2553-2000	美ASTMA 677M-89	IEC60404 -8-7	欧洲标准钢种号	德国DIN46400-1-88	俄罗斯ROCT 21427.2-83
0.23				M127-23S5	1.0860
		23G110		M120-23S5	1.0864
		23P100		M100-23P5	1.0879
		23P095		M95-23P5
		23P090		M90-23P5
0.27	27Q140			M140-27S5	1.0865	VM89-27N	3405
	27Q130	27G130		M130-27S5	1.0866	VM130-27S	3406
	27Q120	27G120	27H163M				3407
	270G110	27P110	27P146M	M110-27P5			3408
	27QG100	27P100		M103-27P5	1.0880
0.30	30Q150			M150-30S5	1.0861	VM97-30N	3404
	30Q140	30G140	30H183M	M140-30S5	1.0862	VM140-30S	3405
	300130	30G130					3406
	30QG130						3407
	30QG120	30P120	30P154M	M117-30P5	1.0882	VM117-30P	3408
	30QG110	30P110		M111-30P5	1.0881	VM111-30P
		30P105		M105-30P5	1.0886
0.35	35Q165			M165-35S5	1.0856	VM111-35-N	3404
	35Q155	35G155	35H207M		1.0857	VM155-35S	3405
	35Q145	35G145		M150-35S5			3406
	35Q135						3407
	35QG135	35P135		M135-35P5			3408
	35QG125	35P125		M125-35P5
		35P115