Structural Steel Plate Supplier - Q235B Q355B S355JR for Construction

Hot Rolled Steel Plate Cut to Size - 10,000+ Tons In Stock for Fast Delivery

Medium Heavy Steel Plate Manufacturer - CE Certified with CNAS Lab Testing

Why Partner with Sanhe Steel?

Qingdao Sanhe Steel Co., Ltd.

Your Trusted Steel Supplier Since 2008 in China — For Construction, Manufacturing & Infrastructure

For over 16 years, Qingdao Sanhe Steel Co., Ltd. has evolved from a local trader into a comprehensive steel supply and processing partner. We don't just sell steel — we provide mission-critical solutions for complex engineering projects worldwide.

With our CNAS-accredited in-house laboratory and a full suite of CNC processing equipment, we guarantee every product meets international standards— and we can cut, slit, or level it to your exact specifications before delivery. Whether you're procuring for a bridge project in Southeast Asia, an automotive plant in Europe, or a factory expansion in the Middle East, Sanhe Steel delivers compliance, quality, and reliability.

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Why Partner with Sanhe Steel?

Construction & Infrastructure

High-rise buildings, bridges, tunnels, and steel structure factories. We supply Q235B, Q355B, and S355JR steel plates, H-beams, and pipe piles — all available with CE certification for EU projects.

Industrial Manufacturing

Machinery, automotive parts, sheet metal fabrication, and home appliances. We offer hot-rolled, cold-rolled, galvanized, and high-strength steel with IATF 16949 certification.

Energy & Transportation

Oil & gas pipelines, power transmission towers, shipbuilding, and port facilities. We provide weathering steel, wear-resistant steel, and corrosion-resistant pipes — engineered for long-term durability in harsh environments.

Custom Processing & Cut-to-Size

Our factory is equipped with CNC shearing and flattening production lines, longitudinal shearing and cutting machines. We can complete shearing, cutting and leveling according to your precise dimensions.

We Are Loyal To Customer Satisfaction.

Frequently Asked Questions by Global Steel Buyers

Quick Answers

1. Are you a factory or a trading company?

Qingdao Sanhe Steel Co., Ltd. is a bona fide manufacturing facility. We own standardized steel plate processing workshops equipped with a full suite of leveling, slitting, cutting, and precision processing machinery. Furthermore, we maintain long-term strategic partnerships with leading steel mills—such as Baowu and HBIS—giving us robust in-house processing and customization capabilities. This allows us to simultaneously meet the diverse needs of large-scale engineering procurement, international trade orders, and precision processing customization projects.

2. How do you guarantee the quality and compliance of steel for international projects?

Every batch of steel we supply is accompanied by MTC (Mill Test Certificate) and, upon request, EN 10204 Type 3.1 or 3.2 inspection documents. Our products are certified with CE (EU CPR), IATF 16949 (automotive), ISO 9001, ISO 14001, and ISO 45001. We also welcome third-party inspections (SGS, Bureau Veritas, etc.) at your convenience. Our CNAS-accredited in-house laboratory ensures every product meets ASTM, JIS, and EN standards before shipment.

3. Can you provide custom processing and cut-to-size steel products?

Absolutely. Our factory is equipped with CNC shearing production lines, longitudinal cutting banding machines, and plate shearing machines. We can process steel plates according to your precise dimensions - including non-standard lengths, widths, and irregular shapes. You need to precisely cut steel strips and precisely cut steel plates to the specified lengths, and we can complete the delivery with strict tolerance control. This will save you time, reduce material waste, and eliminate the need for your own secondary processing steps.

4. What is your typical lead time for stock and customized orders?

For standard stock items, we can ship within 7-15 days after order confirmation. For custom processing orders, lead times typically range from 15-35 days depending on the complexity of processing and quantity. With our strategic mill partnerships and substantial inventory (10,000+ tons in stock), we can also accommodate urgent orders with expedited shipping. We'll always provide you with a clear delivery schedule before order confirmation.

5. What payment terms and shipping methods do you support for export orders?

We support flexible payment terms including T/T (wire transfer), L/C (letter of credit), and D/P. For first-time cooperation, we typically request a 30% deposit + 70% balance before shipment or against B/L copy. For shipping, we work with all major freight forwarders and can arrange FOB (Qingdao Port), CIF, CFR, or DDP terms based on your preference. We have extensive experience with export documentation, customs clearance, and container loading optimization.

6. Do you offer technical support for steel grade selection and material substitution?

Yes — and this is where our 16+ years of experience adds real value. Our technical team can advise you on steel grade selection — for example, when to use Q235B vs. S235JR, or Q355B vs. S355JR for structural applications. We can recommend cost-effective alternatives that meet your project's mechanical property and compliance requirements. Our team has served projects across construction, automotive, energy, and shipbuilding — we understand the material requirements of each industry.

Hot-Selling Steel Products

In Stock & Ready to Ship

Q235 Steel Plate

If you are looking for a reliable manufacturer of Q235 Steel Plates, please choose Sanhe Steel. As a leading supplier in the industry, Sanhe Steel always has tens of thousands of tons of stock available, ensuring efficient delivery. The Q235 steel plate material is a common low-carbon steel. This material, due to its excellent comprehensive performance, has become the preferred material for general welded structural components and load-bearing components.

Carbon Steel Plate

Sanhe Steel is a professional wholesaler that combines steel trading and plate processing. It specializes in the sale of Carbon Steel Plates, Medium and Thick Plates, Pattern Plates, High-Strength Steel, and Openings Plates. As a leading physical manufacturer in the industry, we deeply understand the strict requirements for safety performance in industrial and commercial environments.

Mild Steel Plate

Sanhe Steel is a professional Mild Steel Plate Manufacturer and Supplier in China that integrates steel trading and processing. As a leading physical factory in the industry, we focus on operating various types of steel products such as low-carbon steel plates, and they are suitable for the needs of multiple industries.

Structural Steel Plate

As a steel plate manufacture, Sanhe Steel delivers precision-processed structural steel plate solutions engineered to meet rigorous performance thresholds across multiple sectors. Sanhe Steel industrial-grade portfolio serves high-stress environments, including municipal infrastructure projects, heavy machinery manufacturing, bridge building, and maritime shipbuilding.

Stainless Steel Diamond Plate

Sanhe Steel is a professional integrated steel plate manufacturing factory integrating R&D, production and export. Our stainless steel diamond plate is made of premium S304 and S316 stainless steel raw materials. It features excellent anti-slip performance, outstanding corrosion & salt fog resistance, stable flatness and customization sizes and patterns.

Stainless Steel Checkered Plate for Industrial Applications

Sanhe Steel is a professional integrated steel plate manufacturing factory integrating R&D, production and export. Our Stainless Steel Checkered Plate for Industrial Applications is made of premium S304 and S316 stainless steel raw materials. It features excellent anti-slip performance, outstanding corrosion & salt fog resistance, stable flatness and customization sizes and patterns.

Mild Steel Checkered Plate

Sanhe Steel’ is a specialized manufacturer of carbon steel and low-alloy steel products, with a strong focus on hot-rolled checkered plates for industrial and construction applications. Our mild steel checkered plate offers a cost-effective anti-slip flooring solution that combines reliable structural performance.

6mm Hot Rolled Steel Plate for Industrial Applications

Sanhe Steel, a professional steel processing factory in Qingdao China, supplies standard 6mm Hot Rolled Steel Plate for Industrial Applications with full CNC cutting and shearing customization service. Our hot rolled steel sheet owns stable flatness, precise dimensional tolerance and great coating adaptability for galvanizing treatment. The plates fit construction, machinery, fire protection and solar bracket projects, all finished goods pass full pre-shipment inspection before delivery.

Hot Rolled Diamond Plate

As reliable China factory, Sanhe Steel specializes in wholesale and customized checkered plate. Our hot rolled diamond plate has stable structure, uniform patterns, excellent anti-slip and load-bearing properties. It covers multiple mainstream material grades including Q235B, Q355B and S304/S316. With factory direct supply, flexible wholesale solutions and strict quality inspection

5mm Checkered Plate

Sanhe Steel is a reputable local factory and professional checkered plate manufacturer in China, focusing on the production of premium checkered plates. We offer a reliable 3-5 year quality warranty under normal service conditions. 5mm checkered plate is a cost-effective structural steel material with low maintenance cost and long service life, favored by global distributors.

Carbon Steel Checkered Plate

Sanhe Steel as trusted steel plate manufacturers and factory based in China, supplying checkered plates for global wholesale buyers. We support customized size, pattern and surface finish orders, welcome bulk procurement. Our carbon steel checkered plate carries a 3–5 year quality warranty under standard working conditions with stable anti-slip performance.

6mm Black Hot Rolled Plate

Sanhe Steel, a professional steel processing factory in Qingdao China, supplies standard 6mm black hot rolled plate with full CNC cutting and shearing customization service. Our hot rolled steel sheet owns stable flatness, precise dimensional tolerance and great coating adaptability for galvanizing treatment. The plates fit construction, machinery, fire protection and solar bracket projects, all finished goods pass full pre-shipment inspection before delivery.

Email Us

Zoey@sanhesteels.com

Call Us

+86-15865577002

Address

No. 1188, Lanzhou West Road, Jiaozhou City, Shandong Province, China

Send Inquiry

Applications

Proven Expertise Across Industries

Construction Engineering Field

Real estate residential buildings, municipal infrastructure, bridges and tunnels, rail transit, steel structure factories, prefabricated buildings, all scenarios including main structures, supports, and accessories have steel demand that this product can meet.

Industrial Manufacturing Sector

General machinery, construction machinery, automotive parts, household appliances and furniture, sheet metal processing, meet the requirements for precision steel used in component manufacturing, equipment frames, and shell forming, etc.

Energy and Transportation Sectors

Oil and gas pipelines, power towers, port terminals, container production, shipbuilding, rail transit equipment - all these require special steel with properties such as corrosion resistance, high strength, and wear resistance to meet the demands.

Public Services and Infrastructure Sector

Municipal water supply pipelines, sanitation facilities, storage shelves, decoration projects, hardware accessories, covering both conventional and customized lightweight and general-purpose steel applications.

Industry Insights & Technical Resources

Expert Knowledge for Steel Buyers

2026-07-20

China's Steel Industry Transformation: Replacing Traditional Scale Dividends with Quality Dividends

Over the past two months, the domestic steel market has exhibited a structural divergence characterized by "intense competition in mass-market products under pressure and strong demand for high-end special steels," vividly demonstrating that China's steel industry has completely moved beyond the era of relying solely on production expansion and low-price competition for scale, and has fully entered a new phase focused on quality dividends driven by high-quality customized steel products and technical support services. The article addresses the core challenges faced by purchasers of engineering, machinery, and export-oriented steel products, providing an objective overview of the industry's thriving transformation and upgrading process.

2026-03-12

From a regional powerhouse to an international business card: Sanhe Iron and Steel Company's global supply chain layout for 2026 takes another step forward

In 2026, the global steel trade pattern is undergoing a profound reshaping. In the complex international environment, Sanhe Steel Company has not backed down, but has accelerated the pace of building its global brand. Recently, Sanhe has officially opened its first overseas warehousing and distribution center in Southeast Asia, marking the beginning of its "24-hour delivery circle" targeting overseas markets.

2026-03-12

Rejecting simple 'buying and selling relationships': How can Sanhe Steel Company deeply embed itself in the high-end equipment manufacturing supply chain?

In the current industrial ecosystem, the boundary between steel companies and downstream manufacturing enterprises is becoming blurred. The EVI (Early Supplier Intervention) model vigorously promoted by Sanhe Steel Company in recent years is rewriting traditional procurement logic. When a well-known heavy machinery manufacturer was designing a new generation of cranes, the technical team of Sanhe Steel Company had already settled in its research and development center, providing professional advice from the material selection stage.

2026-03-12

Data driven Hard Power: Exploring Sanhe Steel Company's "Steel Brain" and Digitized Production Line

Entering the production scheduling center of Sanhe Steel Company, what you see is not workers covered in oil stains, but a real-time flashing data screen. In 2026, digitization will no longer be a "face saving project" for steel companies, but an "inner project" that concerns survival. Sanhe Iron and Steel Company has successfully achieved a fully digitized closed-loop system from ore procurement, blast furnace smelting to finished product warehousing through its self-developed "Smart Steel Integration System".

2026-03-12

The "Green Steel" Competition under the Background of Carbon Neutrality: How Can Sanhe Steel Company Win the 2026 Carbon Tariff?

With the comprehensive implementation of the global "carbon border adjustment mechanism", the export threshold of the steel industry is undergoing fundamental changes. In 2026, if steel companies cannot provide detailed carbon footprint reports, they will lose their eligibility for international procurement. In this context, Sanhe Steel Company has taken the lead in completing the "green surgery" from energy structure to process flow.

2026-03-12

Breaking the trap of "internal competition": Sanhe Steel Company reshapes the value chain with high-end specialty steel

In 2026, when the steel industry enters the deep-water zone of "stock competition", a simple price war will no longer provide a moat for enterprises. Faced with the slowing demand for ordinary building materials in the market, Sanhe Steel Company has chosen a difficult but correct path: to comprehensively transform into the high-end special steel field.

2026-02-04

The application of steel plates in the fields of energy and transportation

2026-02-04

ZhiChuang sets a new benchmark for hot-rolled steel, empowering high-end manufacturing

2026-02-04

Deeply focus on the field of anti-slip technology, and empower the upgrade of safety

2026-02-04

Leads The New Trend In The Industry And Continues To Innovate To Promote Industry Development

2026-07-10

Comparison of welding performance between low carbon steel and high carbon steel

The weldability of steel primarily depends on its chemical composition. Among these components, carbon has the greatest impact, meaning that the amount of carbon in the metal determines its weldability.

2026-07-10

What Are The Main Development Trends of Mild Steel Plate?

To meet the dual demands of vehicle lightweight design and driving safety, mild steel plates are evolving toward higher tensile strength. Conventional low-carbon mild steel can no longer satisfy the structural requirements of high-strength vehicle bodies.