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Help CenterCarbon Steel Plate for Ship Building ASTM A131 Grade AH36 DH36 High Strength Steel Plate
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Hemaokang Steel (Shandong) Co., Ltd. takes pride in offering high-strength Carbon Steel Plate for Ship Building ASTM A131 Grade AH36/DH36, a premium material designed to meet the rigorous demands of marine and offshore construction. With an annual export value ranging from US$50 Million to US$100 Million and a dedicated team of 51–100 professionals, we specialize in delivering reliable steel solutions from our Qingdao port. Our plates combine exceptional weldability, toughness, and strength, making them the ideal choice for ship hulls, structural components, and heavy marine equipment.
Each plate is manufactured in strict compliance with ASTM A131 standard, ensuring consistent mechanical properties and dimensional accuracy. Whether you require Grade AH36 for general hull construction or Grade DH36 for higher notch toughness at lower temperatures, our products deliver superior performance. With ISO9001 certification, we guarantee a quality management system that supports every stage of production and delivery.
Key Features & Benefits:
- High Strength & Durability: Minimum yield strength of 355 MPa (AH36) and 355 MPa (DH36) ensures reliable load-bearing capacity in harsh marine environments.
- Excellent Weldability: Low carbon equivalent (CE) design allows easy welding without preheating for most applications, reducing fabrication costs.
- Superior Toughness: DH36 grade offers Charpy V-notch impact test at -20°C, ideal for arctic and low-temperature services.
- Customizable Dimensions: Available in thickness from 6 mm to 120 mm, widths up to 4000 mm, and lengths up to 18000 mm – tailor-made to your project specifications.
- Surface Options: Standard as-rolled, normalized, or quenched & tempered; shot-blasted and primed upon request.
- Global Logistics: Shipped from Qingdao Port with efficient container breakbulk or bulk cargo solutions to North America, Europe, Southeast Asia, and beyond.
| Grade | AH36 / DH36 | Yield Strength (min) | 355 MPa |
| Standard | ASTM A131 / A131M | Tensile Strength | 490–620 MPa |
| Impact Test (DH36) | -20°C, 34J min | Carbon Equivalent (max) | 0.38% (AH36) / 0.40% (DH36) |
| Thickness Range | 6 – 120 mm | Width Range | 1500 – 4000 mm |
| Length Range | 6000 – 18000 mm | Surface | As-rolled / Shot-blasted / Painted |
Detailed Advantages for Your Projects:
Our ASTM A131 Grade AH36/DH36 plates are engineered for shipbuilding applications where weight reduction and strength are critical. The high strength-to-weight ratio allows thinner plates to be used without compromising structural integrity, reducing overall vessel weight and improving fuel efficiency. Additionally, the excellent formability (bending, flanging) enables complex shapes required for modern ship designs.
For offshore platforms and marine equipment, the DH36 grade provides extra safety margins at low temperatures, meeting classification society requirements (e.g., ABS, DNV, Lloyd's) – though specific certifications can be arranged upon request. Our plates undergo ultrasonic testing and visual inspection per ASTM A578/A578M to ensure freedom from internal defects.
We also offer value-added services such as edge trimming, beveling, and heat treatment to save you time during fabrication. With ISO9001:2015 certified processes, every batch is traceable and accompanied by mill test certificates (MTC) in compliance with EN 10204 Type 3.1 or 3.2 (third-party inspection available).
As a reliable partner, Hemaokang Steel has built a solid reputation across diverse global markets – including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our annual export value exceeding US$50 million demonstrates our capacity to handle large-scale orders consistently. Our team of 51–100 experienced employees ensures prompt communication, competitive pricing, and on-time delivery from Qingdao Port.
Choose our Carbon Steel Plate for Ship Building ASTM A131 Grade AH36/DH36 to secure a high-quality foundation for your marine projects. Contact us today for a quotation or technical consultation – we are ready to support your success.
Frequently Asked Questions
Q1: What is the difference between AH36 and DH36 steel plate for ship building?
A: Both grades have the same minimum yield strength of 355 MPa, but DH36 offers improved toughness at low temperatures (Charpy V-notch test at -20°C), making it suitable for arctic and deep-sea vessels. AH36 is typically used for general hull structures where low-temperature impact is not critical. Our supply can include either grade based on your design requirements and classification society rules.
Q2: Do you provide third-party inspection (like ABS, DNV, BV, Lloyd's) certification?
A: Yes, we can arrange third-party inspection by classification societies upon request. While our standard mill test certificates meet EN 10204 Type 3.1, we are flexible to include Type 3.2 with additional charges. Please specify your requirements when ordering.
Q3: What sizes (thickness, width, length) are available for AH36/DH36 plates?
A: Our standard inventory covers thickness from 6 mm to 120 mm, widths from 1500 mm to 4000 mm, and lengths from 6000 mm to 18000 mm. Custom sizes are available upon request, subject to minimum quantity. We can also supply cut-to-size plates to reduce your fabrication waste.
Q4: Can these plates be used for offshore wind turbine foundations?
A: Absolutely. The high strength and good weldability of ASTM A131 AH36/DH36 make them suitable for monopiles, transition pieces, and jacket structures. For extreme low-temperature environments, DH36 is preferred. We recommend consulting our technical team for specific material selection.
Q5: What is the typical delivery time from Qingdao port?
A: For standard sizes in stock, delivery usually takes 15–20 days after order confirmation. Custom-sized plates may require 30–45 days depending on production schedule and quantity. We work with reliable shipping lines to ensure timely arrival to your destination port.
Q6: How do you ensure the quality consistency of each plate?
A: Our production is controlled under ISO9001:2015 certified quality management system. Each plate undergoes mechanical testing (tensile, yield, elongation, and impact when required), ultrasonic inspection, and dimensional checks. Mill test certificates are provided with each shipment, and we keep product traceability from casting to final delivery.
Q7: Do you offer surface treatment options like shot blasting and primer painting?
A: Yes, we provide shot blasting (SA 2.5) and shop primer painting (typically inorganic zinc-rich or epoxy) as optional services. These treatments improve corrosion resistance and facilitate immediate welding/coating at your yard. Please specify your desired surface condition when ordering.
Q8: What is your minimum order quantity (MOQ) for AH36/DH36 plates?
A: For standard thicknesses (6–25 mm), our MOQ is typically 25 metric tons per size. For thicker plates or special dimensions, MOQ may vary. We accommodate small trial orders for new customers to test quality and service. Contact our sales team for precise terms.
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