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Help CenterQ235B Q345B SS400 Carbon Steel Coil With Mill Test Report for Steel Fabrication
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer our premium Q235B, Q345B, and SS400 Carbon Steel Coils, each supplied with a comprehensive Mill Test Report to guarantee traceability and quality. As a newly established yet rapidly growing supplier, we leverage our deep industry expertise and robust supply chain to deliver steel coils that meet the rigorous demands of steel fabrication, construction, and heavy machinery. Our products are manufactured under strict quality control and backed by ISO9001 certification, ensuring consistent performance and dimensional accuracy. Whether you need coils for structural beams, pressure vessels, or general engineering, our carbon steel coils provide the strength and weldability you require.
Key Features & Technical Specifications
- Multiple Grades: Available in Q235B, Q345B, and SS400 to suit different strength and application needs. Q345B offers higher yield strength (345 MPa) for heavy loads, while SS400 provides excellent weldability for general fabrication.
- Precise Dimensions: Thickness range from 1.5mm to 25mm, width from 900mm to 2000mm, with customizable options to meet your project specifications.
- Mill Test Report Included: Every coil is accompanied by a Mill Test Report (MTR) that certifies chemical composition, mechanical properties, and heat treatment details, ensuring full traceability and compliance with international standards.
- Versatile Surface Options: Standard pickled and oiled finish for corrosion resistance; optional hot-dip galvanized or plain black finish available upon request.
- High Strength-to-Weight Ratio: Optimized for structural applications, reducing material usage while maintaining load-bearing capacity.
| Parameter | Q235B | Q345B | SS400 |
|---|---|---|---|
| Yield Strength (min) | 235 MPa | 345 MPa | 245 MPa |
| Tensile Strength | 375-500 MPa | 470-630 MPa | 400-510 MPa |
| Elongation (min) | 26% | 21% | 17% |
| Carbon Content (max) | 0.20% | 0.20% | 0.25% |
Advantages for Your Fabrication Projects
- Excellent Weldability: Low carbon content ensures smooth welding with minimal preheating, reducing labor time and costs.
- Consistent Mechanical Properties: Each coil is tested for hardness, impact resistance, and ductility, guaranteeing uniform performance across the entire batch.
- Customizable Processing: We can slit, cut to length, or pickle coils according to your drawings, saving you secondary processing steps.
- Cost-Effective: Direct mill pricing with annual export value exceeding US$50 million allows us to offer competitive rates without compromising quality.
- Global Logistics: Shipped from Qingdao Port with efficient customs clearance, reaching North America, Europe, Southeast Asia, and other major markets within 20-30 days.
Trust & Reliability
Hemaokang Steel (Shandong) Co., Ltd. has been serving the global steel industry since 2025, with a dedicated team of 51-100 professionals and annual export revenue of US$50-100 million. Our ISO9001-certified management system ensures every step—from raw material sourcing to final inspection—meets international quality standards. We have successfully supplied carbon steel coils to customers in over 15 regions, including North America, Europe, Africa, and Oceania. Each order is accompanied by a Mill Test Report that provides full transparency, so you can be confident in the material's origin and properties. Contact us today to request a quotation or sample, and experience the reliability of a partner committed to your success.
Frequently Asked Questions (FAQ)
1. What is the difference between Q235B, Q345B, and SS400?
Q235B is a general-purpose carbon steel with minimum yield strength of 235 MPa, ideal for light structures. Q345B offers higher strength (345 MPa) for heavy-duty applications like bridges and buildings. SS400 is a Japanese standard (JIS G3101) with 245 MPa yield strength, commonly used in general fabrication due to its excellent weldability. All three are widely accepted in global markets.
2. Do you provide Mill Test Reports for every coil?
Yes, every coil shipped is accompanied by a Mill Test Report (MTR) that includes chemical composition, mechanical properties, and heat number. This ensures full traceability and compliance with your project specifications.
3. Can you customize the coil dimensions (thickness, width, inner diameter)?
Absolutely. We offer customizable thickness (1.5mm-25mm), width (900mm-2000mm), and inner diameter (508mm or 610mm). Please provide your specific requirements, and we will adjust production accordingly.
4. What surface treatments are available?
Standard surface is pickled and oiled to prevent rust. We also offer hot-dip galvanized, plain black, or coated options upon request. Please specify your needs when placing an order.
5. How do you ensure quality control?
Our factory is ISO9001 certified. Each production batch undergoes chemical analysis, tensile testing, and visual inspection. We also perform third-party inspections (e.g., SGS, BV) if required by the buyer.
6. What is the typical lead time and shipping method?
Lead time for standard coils is 15-20 days after order confirmation. For custom dimensions, it may extend to 25-30 days. We ship from Qingdao Port via sea freight (FOB, CIF, or CFR terms) and can arrange door-to-door delivery for bulk orders.
7. Do you offer samples for testing?
Yes, we can provide small samples (e.g., 300mm x 300mm) for testing. The sample is free, but the buyer covers shipping costs. Please contact our sales team to arrange.
8. What are your payment terms?
We accept T/T (30% deposit, 70% against copy of shipping documents) and L/C at sight. For long-term partnerships, other terms may be negotiable.
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