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Low Carbon Steel Coil ASTM A36 1.5mm-6mm Thickness Black Annealed Surface For Construction
Product Spotlights
Premium low carbon steel coil per ASTM A36, thickness 1.5-6mm, black annealed surface for construction. Backed by ISO9001, 51-100 employees, annual export over US$50M. Customizable width, slitting, cut-to-length. Excellent weldability, formability, and cost efficiency for structural applications.
Negotiable
MOQ: 1 Ton (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Standard:
Other, ASTM A36
Surface Treatment:
Other, Black Annealed
Application:
Other, Construction
Payment & Shipping
Payment Methods:
Port of Shipment:
Qingdao Port
Delivery Detail:
7 days
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Standard
Other, ASTM A36
Surface Treatment
Other, Black Annealed
Application
Other, Construction
material
Low Carbon Steel
thickness
1.5mm - 6mm
width
Customizable (e.g., 1000-2000mm)
coil weight
3-10 tons (customizable)
inner diameter
508mm or 610mm (optional)
Hemaokang Steel (Shandong) Co., Ltd. proudly presents our premium Low Carbon Steel Coil ASTM A36 with a thickness range of 1.5mm to 6mm and a black annealed surface, specifically engineered for construction applications. As a trusted supplier with an annual export value exceeding US$50 million and ISO9001 certification, we ensure that every coil delivered meets the highest standards of quality and consistency. Our black annealed finish not only enhances corrosion resistance during storage and transport but also provides an excellent base for subsequent painting or coating, making it a versatile choice for structural framing, roofing, and industrial components.
Key Features & Technical Specifications
- Material Grade: Low Carbon Steel per ASTM A36 – ensuring excellent weldability, formability, and machinability for general structural purposes.
- Thickness Range: 1.5mm to 6mm (customizable within this range) – ideal for light to medium structural loads.
- Surface Condition: Black annealed – a smooth, dark oxide layer that provides temporary rust protection and improves paint adhesion.
- Width Options: Standard widths from 1000mm to 2000mm, with custom widths available upon request.
- Coil Weight: Typically 3–10 tons per coil, slittable to smaller widths as needed.
- Inner Diameter: 508mm or 610mm ID, suitable for most uncoilers.
- Application: Construction – beams, columns, channels, floor decking, and other structural components.
Detailed Parameter Table
| Parameter | Value | Notes |
|---|---|---|
| Standard | ASTM A36 | Equivalent to Q235B (GB) |
| Tensile Strength | 400–550 MPa | Typical range |
| Yield Strength (min) | 250 MPa | For thickness ≤ 200mm |
| Elongation (min) | 20% (in 200mm) | Ensures ductility |
| Surface Finish | Black Annealed | Oxide layer, no oil |
| Coil Edge | Mill edge or slitted edge | Customizable |
Advantages & Customer Benefits
- Cost-Effective: Low carbon content reduces raw material cost while maintaining adequate strength for most construction needs.
- Superior Weldability: ASTM A36 is known for excellent weldability, saving time and labor during fabrication.
- Formability: Can be easily bent, punched, or rolled into various shapes without cracking.
- Consistent Quality: Our ISO9001-certified production process ensures tight thickness tolerances and uniform mechanical properties across every coil.
- Ready for Coating: The black annealed surface provides a clean, slightly rough profile that promotes adhesion of paints, primers, or powder coatings.
- Flexible Sourcing: We offer custom widths, slitting, and cut-to-length services to meet your project specifications.
Trust & Reliability
With Hemaokang Steel (Shandong) Co., Ltd., you partner with a company that has been operating since 2025 and already exports US$50 million to US$100 million annually. Our team of 51–100 experienced professionals ensures that every order is handled with care. We serve markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East, demonstrating our global reach and commitment to quality. All our low carbon steel coils are produced under strict quality control and backed by our ISO9001 certification.
We invite you to experience the Hemaokang difference. Our competitive pricing, flexible customization, and reliable delivery schedules make us the preferred partner for construction projects worldwide. Contact us today for a quote or to discuss your specific requirements. Let us supply the steel coils that build your success.
Frequently Asked Questions (FAQ)
-
Q: What is the difference between ASTM A36 and mild steel?
A: ASTM A36 is a specific standard for low carbon steel with defined mechanical properties (min yield 250 MPa, tensile 400–550 MPa). It is a common grade of mild steel used in structural applications. -
Q: Can the black annealed surface be painted directly?
A: Yes, the black annealed finish is a thin oxide layer that provides good adhesion for paints and primers. However, for best results, we recommend a light surface cleaning or degreasing before painting. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ for standard sizes is 5 tons per specification. Custom sizes may have higher MOQ. Please contact us for details. -
Q: Do you provide cutting or slitting services?
A: Yes, we offer slitting to narrower widths and cut-to-length sheets. These services are available upon request and may incur additional charges. -
Q: How long does delivery take?
A: For standard coils, delivery typically takes 15–25 days after order confirmation. Custom orders may require 25–35 days. We ship via sea, rail, or air as per your preference. -
Q: What packaging do you use for export?
A: Coils are packed with steel strapping, wrapped in waterproof paper, and optional wooden crates for added protection. Inner and outer edges are protected to prevent damage during transit. -
Q: Is the steel coil compatible with welding processes?
A: Absolutely. ASTM A36 is weldable using common methods such as SMAW, GMAW, and FCAW. Preheating is generally not required for thicknesses below 20mm, but we recommend following standard welding procedures. -
Q: Do you provide a mill test certificate?
A: Yes, each shipment comes with a mill test certificate (MTC) that includes chemical composition and mechanical properties, traceable to the heat number. This is part of our ISO9001 quality assurance.
Send Inquiry to This Supplier
1Yr
Year Established
2025
Annual Export Value
US$50 Million - US$100 Million
Total Employees
51 - 100 People
Product Certifications
ISO9001
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