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03/02/2026

Heilongjiang Jianlong Successfully Passed AEO Advanced Certification

On January 20, after rigorous review and on-site inspection, Harbin Customs of Heilongjiang Province officially granted Heilongjiang Jianlong International Trade the prestigious AEO (Authorized Economic Operation) advanced certification.

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27/01/2026

Xiangtan Iron and Steel Supports Successful Commissioning of International Advanced Energy Project

Xiangtan Iron and Steel supplied 4,000 tons of high-end energy steel for BASF's billion-euro chemical project in China. Leveraging its comprehensive R&D and service capabilities for energy steel products, the company has further solidified its market position in the global high-end energy engineering sector.

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04/01/2026

Xingcheng Special Steel's 1000 MPa Grade High-Strength Steel for Hydropower Applications Passes Simulation Testing

Xingcheng Special Steel, in collaboration with multiple institutions, has successfully passed the evaluation of simulated engineering application tests for 1000 MPa-grade high-strength steel for hydropower projects, verifying its outstanding performance. The company has achieved industrial-scale production of an integrated “steel plate + welding material” solution, providing critical material support for China's super-large hydropower projects.

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30/12/2025

Tangsteel X60M Pipeline Steel Supports Major Water Supply Project Along The Belt and Road Initiative (BRI)

HBIS Tangsteel has successfully supplied high-end customized pipeline steel in bulk for major water conveyance projects in Belt and Road countries. Through outstanding product performance and comprehensive end-to-end services, the company has demonstrated its technological prowess and market competitiveness in the high-end steel sector.

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09/12/2025

Jingye Precision Pipe Manufacturing Overcomes High-Difficulty Special-Shaped Tube Orders

Recently, Jingye Precision Pipe Manufacturing Co., Ltd. successfully delivered a batch of orders for large-diameter special-shaped square tubes conforming to American standards, which are technically challenging and have stringent process requirements.

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19/08/2025

Shandong Lingang Nonferrous Metals' 100,000-ton annual high-end stainless steel seamless pipe project successfully completed its first trial run.

Shengyang Group's Shandong Lingang Nonferrous Metals project, with an annual output of 100,000 tons of high-end stainless steel seamless pipe, successfully completed its trial run on August 16th. Leveraging the group's raw material advantages to achieve direct supply through a short process, the project is focused on producing high-end stainless steel products and will contribute to the comprehensive development of the stainless steel industry chain.

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04/08/2025

Heilongjiang Jianlong Seamless Steel Pipe Products Have Been Certified by Two Middle Eastern Oil Companies

In recent years, with the sharp increase in demand for high-end seamless steel pipes in the international oil and petrochemical markets, Heilongjiang Jianlong has actively promoted the optimization and adjustment of the product structure of seamless steel pipes.

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Answers

Advantages and Disadvantages of electro galvanized steel:
Advantages of electro galvanized steel:
1. Thin coating: The zinc layer in electro galvanized steel is thinner than that in hot-dip galvanizing, typically ranging from 5 to 20 micrometers. As a result, the surface is smooth and does not alter the dimensions or shape of the steel.
2. Uniformity: The zinc coating is uniform and can be applied to the surfaces of objects with complex shapes, such as screws and nuts.
3. Low Cost: The production cost of electro galvanized steel is relatively low because it does not require heating and cooling, unlike hot-dip galvanizing.
4. Environmental friendliness: The electro galvanized steel process does not produce exhaust gases or wastewater, resulting in a minimal environmental impact.

Disadvantages of electro galvanized steel:
1. Poor corrosion resistance: The zinc coating in electro galvanized steel is thinner than that in hot-dip galvanizing, so its corrosion resistance is relatively poor; it is particularly prone to rusting in humid and corrosive environments.
2. Poor wear resistance: The zinc coating in electro galvanized steel is thinner than that in hot-dip galvanizing, resulting in relatively poor wear resistance; it is prone to scratches and abrasion.
3. Limited scope of application: Electro galvanized steel is typically used for steel products in indoor settings and mildly corrosive environments, such as furniture, appliances, and automotive parts.
How much does a sheet of 4mm thick patterned steel plate cost?
The price of patterned steel plates varies depending on their thickness. With the same material, thicker plates are more expensive. Different materials also have different prices. The specific price depends on market conditions. Please tell us your specific purchasing needs so we can give you a more accurate reply and quote.
What is P20 material?
P20 is a pre-hardened plastic mold steel, corresponding to the Chinese national standard 3Cr2Mo and the German standard 1.2311.

P20 contains alloying elements such as chromium and molybdenum, has a uniform microstructure, well-controlled impurities, stable machining performance, reasonable tool wear, and good surface finish. It is suitable for making structural parts such as cavities, cores, and mold frames. Upon arrival, it can be directly milled, ground, drilled, and EDM machined without additional quenching and tempering, shortening the mold making cycle and reducing precision issues caused by heat treatment deformation.

Its polishing performance meets the requirements of most plastic exterior parts, adapting to the surface standards of molds for household appliance housings, automotive interiors, and daily necessities. It can also undergo nitriding treatment to improve wear resistance.


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