Description: BBN steel is a well-known steel manufacturer and service provider in China, ASTM A131 DH36 steel is our superior product, we are favored by customers with high quality, competitive price and excellent service
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
High-Tensile Hull Structural Steel Grade | 355 MPa Min. Yield Strength | 490–620 MPa Tensile Strength | Mandatory −20°C Charpy V-notch Impact Test | ABS · DNV · LR · BV · CCS Certified | MTC / EN 10204 3.1
−20°C Impact ToughnessMandatory −20°C Charpy V-notch impact test — resists structural fatigue and brittle fracture in medium-low temperature sea conditions.
Stronger & Tougher Than AH SeriesMore stable strength and toughness than ordinary AH series marine steel, with 490–620 MPa tensile strength.
Marine Corrosion ResistanceSuperior seawater corrosion resistance with reliable weldability — resists wave impact and low-temperature structural fatigue.
01Product Overview & Specifications
ASTM A131 DH36 is a high-tensile hull structural steel grade compliant with the ASTM A131 / A131M international standard, specially developed for shipbuilding and offshore engineering structures. Balancing high structural strength and excellent comprehensive performance, DH36 features mandatory −20°C Charpy V-notch low-temperature toughness, superior marine corrosion resistance, stable processing performance and reliable weldability.
Manufactured with standardized hot rolling and precision quality control processes, DH36 shipbuilding steel delivers more stable strength and toughness than ordinary AH series marine steel. It effectively resists seawater corrosion, wave impact and low-temperature structural fatigue, ensuring long-term structural stability and safety of marine equipment — greatly reducing later maintenance costs and improving the overall service life of ship and offshore engineering projects.
Item
Specification Details
Steel Grade
ASTM A131 DH36
Executive Standard
ASTM A131 / A131M International Standard
Product Type
High-tensile hull structural steel plate
Thickness Range
4mm – 200mm full range available
Standard Width
1000mm – 4000mm
Standard Length
4000mm – 12000mmCustom
Production Process
Hot Rolled (As-Rolled)
Low-temperature Test
−20°C Charpy V-notch Impact Test
Processing Service
Cutting, Flattening, Edge Beveling, UT Inspection
Surface Condition
Smooth surface, uniform texture, no cracks, no rust spots
MOQ
1 Ton / Negotiable
Delivery Time
3–7 days (stock); 15–30 days (custom)
Custom Production
Yes — custom sizes and precision processing available
Certification
ABS, DNV, LR, BV, CCS, MTC / EN 10204 3.1
Payment Terms
T/T, L/C, Western Union, Trade Assurance
02Equivalent International Grades
ASTM A131 DH36 is universally recognized by mainstream international ship classification societies, with multiple equivalent marine steel grades featuring consistent high strength and −20°C low-temperature toughness — fully meeting cross-standard replacement and global marine project bidding and procurement requirements.
Standard System
Equivalent Grade
ABS Standard
ABS DH36
CCS Standard
CCS DH36
DNV Standard
DNV DH36
LR Standard
LR DH36
Note: Slight differences exist in production process and detailed inspection standards among equivalent grades. It is recommended to confirm welding parameters and low-temperature impact indicators according to actual ship classification specifications before material replacement.
03Chemical Composition
ASTM A131 DH36 adopts an optimized low-alloy purified formula with strict control of impurity elements (max mass fraction %) — the scientific element ratio ensures high tensile strength and excellent −20°C low-temperature toughness while maintaining outstanding marine corrosion resistance and weldability.
Element
Max %
Element
Max %
C (Carbon)
0.18
Nb (Niobium)
0.02 – 0.05
Si (Silicon)
0.10 – 0.50
V (Vanadium)
0.05 – 0.10
Mn (Manganese)
0.90 – 1.60
Ti (Titanium)
0.02
P (Phosphorus)
0.035
Cu (Copper)
0.35
S (Sulfur)
0.035
Cr (Chromium)
0.20
Al (Aluminium)
>0.015 (Min.)
Ni (Nickel)
0.40
N (Nitrogen)
—
Mo (Molybdenum)
0.08
Note: Values above are specified limits (max mass fraction unless marked as a range or minimum) per ASTM A131 / A131M. The exact heat analysis of each plate is stated in its Mill Test Certificate (MTC / EN 10204 3.1) supplied with delivery.
04Welding Performance Parameters
Professional carbon equivalent and crack sensitivity coefficient indicators guide on-site welding construction effectively — preventing welding cold cracks and structural defects and ensuring stable welding quality and long-term structural safety of DH36 marine steel in complex marine service environments.
Note: Pcm and Ceq are calculated from the actual heat analysis of each plate and are recorded in the MTC. Lower values mean better weldability and lower preheat requirement — please confirm preheat and interpass temperature with your welding procedure specification (WPS) for the intended service temperature.
05Mechanical Properties
All mechanical performance indicators of ASTM A131 DH36 strictly comply with ASTM international standards — high yield and tensile strength, excellent ductility and stable −20°C low-temperature impact toughness.
Note: Energy 1 is the transverse impact test value and Energy 2 is the longitudinal impact test value at −20°C. Impact requirements for thickness ranges above 50mm follow the applicable classification society rules and order agreement — the actual test values of each plate are stated in its MTC.
06Application & Service
With high tensile strength, excellent −20°C low-temperature toughness, outstanding marine corrosion resistance and superior weldability and processability, A131 DH36 shipbuilding steel plate is widely used in mainstream shipbuilding and ordinary offshore engineering projects.
Commercial Shipbuilding
Cargo ships, container ships, bulk carrier hull main structures, decks and bulkhead plates.
Offshore Engineering
Offshore platform main structures, marine support components and offshore equipment auxiliary parts.
Marine Auxiliary Facilities
Port marine machinery, ship auxiliary structural parts and seawater corrosion resistant structural components.
1
Full-Size Stock
A131 DH36 plates 4–200mm in sufficient stock, delivered within 3–7 days.
2
Deep Processing
Cutting, flattening, edge beveling and UT inspection for precision installation on site.
3
Classification Certification
ABS, DNV, LR, BV and CCS approval with full classification society certification.
4
Marine Documentation
Official MTC test reports and complete qualification documents with every delivery.
Custom sizes and one-stop deep processing: cutting, flattening, edge beveling, UT inspection
−20°C Charpy V-notch impact test performed with results recorded in the MTC
ABS, DNV, LR, BV, CCS certification with MTC / EN 10204 3.1 documents
Get Your ASTM A131 DH36 Shipbuilding Steel Quotation Now
Send us your thickness, width & length (or part drawings), quantity, impact test and classification society requirements. We will reply with stock status, price, delivery time and complete certification documents within 24 hours.
BBN Steel has established a complete set of production and supplier management system processes to ensure the improvement of product quality and better service to users.
Production Control
BBN Steel has established a complete production quality control process to ensure every link from research and development to mass production.
Supplier management
Our supplier selection will consider factors such as health and safety, ethics, environmental protection, price and quality to better serve customers.
Certification & Patent
We have successively won various international authoritative certifications, GB /T19001-ISO9001: 2000 quality management system was implemented.
After sales service
We provide booking space, shipping tracking service and after-sales service, we will always be first-class products and perfect pre-sale and after-sales service.
Get in Touch
Welcome to contact us through online consulting, emails and hotline if you are interested in our company or products. Our staff will reply you within 24 hours.
Address: HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA
