SS400 Hot Rolled Steel Plate

As an established manufacturer and factory specializing in carbon steel plate distribution and precision processing, Sanhe Steel provides comprehensive SS400 hot rolled steel plate solutions aligned with JIS G3101 standards for general structural applications worldwide. As a universal carbon structural grade, SS400 delivers a well-balanced combination of tensile strength, ductility, and fabrication ease that makes it the workhorse material for countless industrial and construction projects. Backed by our ISO 9001 certified quality management system and strategic mill partnerships, we supply both standard stock dimensions and custom-processed specifications to meet diverse project requirements.

Core Strengths

SS400 is classified as a general-purpose carbon structural steel under Japanese Industrial Standards, widely recognized for its dependable mechanical properties and versatile performance across structural and manufacturing applications. The grade strikes an optimal balance between strength, formability, and material cost, making it the standard choice for projects where reliable structural performance at an economical price point is the primary requirement.

1. Reliable mechanical performance and durability — This grade delivers a stable tensile strength range of 400–510 MPa with a minimum yield strength of 245 MPa. The material resists deformation and cracking under heavy loading pressures and harsh outdoor conditions, ensuring long-term structural component stability across demanding construction and production environments with dependable service life.

2. High processing adaptability with reduced material loss — The plate exhibits excellent plasticity and toughness, enabling smooth execution of common fabrication operations including cutting, bending, welding, and punching. It is compatible with both conventional and specialized processing techniques, reducing fabrication difficulty and material waste while effectively lowering downstream processing costs and improving overall production efficiency.

3. Rigorous quality inspection for certified compliance — Every batch undergoes full-process quality verification including dimensional inspection, chemical composition analysis, and mechanical property testing, ensuring full compliance with JIS G3101 standards and international quality specifications. Surface defects such as cracks, inclusions, and irregular surface conditions are eliminated through systematic inspection protocols. Complete material certification and quality inspection reports accompany each shipment, providing transparent and fully traceable quality assurance.

4. Flexible specification range with custom options — We maintain regular-sized inventory while also supporting customized plate thickness, width, and length according to customer requirements. Both small-batch mixed procurement and large-scale project-specific dimension orders can be accurately matched to minimize material waste and accommodate individualized material requirements across diverse applications.

5. Direct mill supply with full cost efficiency — As a direct-source steel supplier with established mill partnerships, we eliminate intermediate markup layers, delivering competitive pricing while maintaining consistent product quality. Combined with our efficient logistics system, we support rapid dispatch for urgent stock orders and on-time delivery for volume shipments, enabling customers to confidently manage tight project schedules.

These combined advantages establish SS400 Hot Rolled Steel Plate as a dependable and cost-effective material solution for general structural and manufacturing applications across multiple industry sectors.

Specifications

The following table outlines the complete standard specification parameters for our SS400 product range, covering material standards, chemical composition limits, mechanical property guarantees, dimensional ranges, and commercial terms.

Parameter Details

Beyond standard stock dimensions, our Qingdao processing facility provides value-added fabrication services including precision CNC shearing, longitudinal slitting, and hydraulic leveling. These capabilities enable us to supply cut-to-size plates ready for direct fabrication use, reducing downstream processing workload at customer facilities. Our technical team uses precision inspection equipment to verify dimensional accuracy at each processing stage, ensuring every finished piece meets specified tolerance requirements.

Applications

Thanks to its balanced performance profile and exceptional practical value, SS400 hot rolled steel plate serves as a standard structural material across a wide range of industries and application scenarios. From building infrastructure through machinery manufacturing, hardware fabrication, and transportation components, the material delivers consistent and reliable performance.

Construction Engineering

Widely utilized for factory building steel structures, bridge support components, building structural frames, foundation embedded parts, and prefabricated building structural elements. Its dependable strength and good weldability make it suitable for both primary and secondary structural applications in commercial, industrial, and civil construction projects of varying scales.

Machinery Manufacturing

Commonly specified for heavy equipment base frames, machinery chassis, transmission components, engineering machinery housings, and general heavy machinery structural parts. The material's combination of structural rigidity and fabrication versatility supports efficient manufacturing processes across the mechanical equipment production sector.

Marine & Offshore

Applied for ship deck structural components, offshore platform support structures, and general marine engineering secondary structural elements. For standard atmospheric and non-critical marine applications, SS400 provides adequate structural performance at an economical material cost point.

Transportation & Automotive

Used in truck chassis frames, trailer body structures, railway support components, and general transportation facility parts. The grade balances required structural strength with reasonable material weight, supporting efficient manufacturing of transportation equipment and infrastructure components.

Hardware & General Fabrication

Suitable for storage rack manufacturing, pipe support brackets, sheet metal stamped components, and various welded and fabricated spare parts. Its good formability and universal availability make it the go-to material for general metalworking shops and hardware fabrication operations producing structural and functional metal components.

The broad applicability of SS400 Hot Rolled Steel Plate across these diverse sectors reflects its position as the most widely specified general structural carbon steel grade under the JIS standard system.

Our Advantages

Sanhe Steel is a comprehensive steel enterprise integrating production coordination, precision processing, sales, and distribution services. With years of deep industry experience, we have accumulated extensive domestic and international supply expertise across carbon steel, alloy steel, and other quality steel product categories. Our SS400 product line has earned long-term trust from a large customer base through consistent and stable quality performance.

Our facility is equipped with modern steel plate processing lines, professional quality inspection instrumentation, and an experienced technical team that controls quality from incoming material verification through finished product dispatch. This ensures every SS400 plate meets applicable standards and is delivered in full compliance with customer specifications.

At the same time, we maintain a customer-centric approach, providing one-stop services including material selection consultation, customized processing, and logistics distribution. Whether you operate a small fabrication shop or manage procurement for a large general contractor, we can deliver solutions matched to your specific requirements. We aim to become your long-term stable steel supply partner through reliable quality and attentive service.

1. Certified quality management systems — Our operations hold ISO 9001 quality management certification, ISO 14001 environmental management certification, and ISO 45001 occupational health and safety certification with IQNET international mutual recognition, ensuring consistent quality standards and operational reliability across every order.

2. Strategic mill partnerships — Long-term cooperative relationships with leading steel mills including Baowu and Hebei Steel ensure stable supply availability, competitive pricing, and consistent material quality across all standard grades and specifications we offer.

3. Three-tier customer service framework — Our comprehensive service system covers pre-sales material consultation and sample evaluation, in-sales order tracking with dedicated account management, and responsive after-sales support to ensure smooth project execution from initial inquiry through final delivery.

4. Proven industry track record — Founded in 2008, we have built over 15 years of industry expertise and maintain a customer renewal rate exceeding 90% for our customized processing services, earning recognition as a premium regional steel trade service provider.

5. Efficient port logistics capability — Our strategic Qingdao location with direct port access enables efficient domestic distribution and international export shipments. Optimized inventory layout and streamlined order processing minimize turnaround time from order placement to dispatch.

FAQ

Q1: What distinguishes SS400 from ordinary carbon steel plates?

A: SS400 complies with JIS G3101 standards with balanced strength, ductility, and weldability optimized for general structural components. It offers better cost efficiency for large-scale engineering and fabrication projects compared with generic carbon steel alternatives, with more consistent performance stability.

Q2: Do you provide cutting and bending processing services?

A: Yes, we support custom processing according to customer requirements. Provide your dimensional drawings and fabrication specifications and we can supply finished cut, bent, or welded components directly, saving your downstream processing steps and associated time and labor costs.

Q3: What are the payment and delivery terms?

A: Payment is typically by telegraphic transfer with 30% deposit and balance settled before shipment. Delivery options include sea freight and land transportation, with optimal routing arranged based on destination address and schedule requirements to ensure timely and secure delivery.

Q4: Do you provide quality certificates and how is quality ensured?

A: Each shipment includes corresponding material certificates and quality inspection reports. We also support customer self-inspection or third-party quality verification, with full-process quality controls in place to prevent non-conforming products from leaving the factory.

Q5: Can you handle urgent orders and do you maintain regular stock?

A: We maintain year-round inventory of SS400 plates in conventional thicknesses and widths. Urgent orders can be prioritized for shipment within 7-15 days. Custom specification orders can also be expedited through production to minimize lead times and meet urgent material requirements.

Q6: What is the minimum order quantity for SS400 plates?

A: The standard MOQ is 5 tons, though this is negotiable for larger bulk orders. We also accommodate smaller trial orders for customers evaluating material quality and performance before committing to volume purchases.

Q7: What surface condition are the plates supplied in?

A: Standard supply is the as-hot-rolled black mill surface, flat and clean with no significant surface defects. Additional surface preparation treatments can be arranged upon request for applications requiring specific surface conditions.

Summary

SS400 hot rolled steel plate occupies a foundational position in the JIS standard material system as the most widely specified general-purpose carbon structural grade. Its well-balanced combination of 400-510 MPa tensile strength, minimum 245 MPa yield strength, and minimum 21% elongation delivers the mechanical performance required for the majority of standard structural and manufacturing applications, while its chemical composition ensures excellent weldability and formability for efficient fabrication.

Available in thicknesses from 3mm to 100mm and widths up to 3500mm with custom dimension options, the material accommodates projects ranging from small hardware components through large-scale building and bridge structures. Its compliance with JIS G3101 standards provides internationally recognized quality benchmarks that are accepted across global supply chains and engineering practices.

Sanhe Steel supports customers worldwide with dependable supply of SS400 structural plates backed by ISO-certified quality management systems, precision CNC processing capabilities, and a comprehensive three-tier service framework that has earned us a customer retention rate above 90%. Whether your project requires standard stock plates, custom-cut dimensions, or value-added processing services, our SS400 Hot Rolled Steel Plate solutions deliver the consistent quality and reliable supply your engineering and manufacturing operations depend on.

We welcome inquiries from fabricators, contractors, engineering firms, and trading partners globally. Contact our technical sales team for detailed quotations, material selection guidance, or sample evaluation — we are ready to support your structural steel procurement requirements with expertise and efficiency.