Description: BBN steel is a well-known steel manufacturer and service provider in China, ASTM A131 AH36 steel plate is our superior product, we are favored by customers with high quality, competitive price and excellent service
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High-Strength Marine Structural Steel | 355 MPa (51 KSI) Min. Yield | 490–620 MPa Tensile | Strict 0°C Charpy V-notch Impact Test | All Thicknesses Available As-Rolled | ABS / CCS / LR / DNV Certified
0°C Impact ToughnessStrict 0°C Charpy V-notch impact test guarantees stable low-temperature toughness and anti-fatigue performance.
355 MPa / 51 KSI YieldMinimum yield strength of 355 MPa (51 KSI) with outstanding structural toughness and marine environmental adaptability.
As-Rolled for All ThicknessesAll AH36 thicknesses can be supplied as-rolled; normalized and control-rolled conditions also available.
01Product Overview & Specifications
ASTM A131 AH36 is a high-strength structural steel specially designed for shipbuilding and offshore marine engineering. As one of the most widely used marine steel grades, it features a minimum yield strength of 355 MPa (51 KSI), outstanding structural toughness and excellent marine environmental adaptability.
All AH36 steel plate thicknesses can be supplied in as-rolled condition. A strict 0°C Charpy V-notch impact test guarantees stable low-temperature toughness and anti-fatigue performance, making it ideal for hull structures, offshore platforms and marine load-bearing components. It is certified and compliant with mainstream ship classification society standards for global marine projects.
Item
Specification Details
Steel Grade
ASTM A131 AH36 High Strength Marine Steel
Executive Standard
ASTM A131 / A131M, Marine Classification Society Certified
Plate Type
Hot Rolled Shipbuilding Structural Steel Plate
Thickness Range
5mm – 150mm full range available
Width Range
1800mm – 5500mm
Length Range
3000mm – 18000mmcustom sizes negotiable
Delivery Condition
As Rolled / Normalized / Control Rolled
Core Advantage
355 MPa high yield strength, excellent 0°C impact toughness, superior marine corrosion resistance and weldability
Main Application
Ship hull structure, offshore oil platforms, marine engineering equipment, ship deck and load-bearing parts
MOQ
1 Ton / Negotiable
Delivery Time
In-stock: 3–7 days; custom production: 10–30 working days
Certification
MTC, EN 10204 3.1, ABS / CCS / LR / DNV third-party ship inspection certificate
ASTM A131 AH36 marine steel has widely recognized equivalent grades in global standards, supporting seamless material replacement for international shipbuilding and offshore projects.
Standard System
Equivalent Grade
Chinese GB Standard
AH36 (GB 712)
EN Standard
S355NL
JIS Standard
SM490B
ABS Marine Grade
ABS AH36
Note: Equivalent grades match A131 AH36 in general strength level and weldability, yet differences exist in production process, detailed inspection standards and low-temperature impact requirements. It is recommended to confirm welding parameters and impact indicators according to actual ship classification specifications before material replacement.
03Chemical Composition
The maximum and range limits of chemical composition (mass fraction %) for ASTM A131 AH36 high-strength steel — the controlled chemistry behind its strength, toughness and marine corrosion resistance.
Element
Content %
Element
Content % (Max)
C (Carbon)
0.18 (Max)
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 (Max)
Cu (Copper)
0.35
S (Sulfur)
0.035 (Max)
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 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.
04Mechanical Properties
Room-temperature mechanical properties and 0°C Charpy V-notch impact test parameters of ASTM A131 AH36 high-strength steel.
Note: Energy 1 is the transverse impact test value and Energy 2 is the longitudinal impact test value at 0°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.
05Main Applications
With a minimum yield strength of 355 MPa, A131 AH36 shipbuilding steel plate features high strength, excellent toughness and superior adaptability to marine environments — widely applied in ship manufacturing, offshore oil platforms and marine engineering structural projects.
Offshore oil & gas platforms, marine wind power supporting structures and offshore equipment bases.
Marine Facilities
Port machinery structures, marine engineering vessels, floating facilities and auxiliary marine steel structures.
06Stock, Processing & Procurement
Full-spec AH36 shipbuilding steel plates with complete ship inspection certificates — bulk wholesale, custom deep processing and one-stop marine steel procurement for global shipyard and offshore engineering clients.
1
In-Stock Supply
Full-size A131 AH36 plates 5–150mm in stock, delivered within 3–7 days.
2
Custom Deep Processing
Custom cutting, bending, welding, surface treatment and precision sizing, 10–30 working days.
3
Ship Inspection
ABS / CCS / LR / DNV third-party ship inspection certificates with MTC and EN 10204 3.1.
4
One-Stop Procurement
Bulk wholesale and consolidated marine steel sourcing for global shipyard projects.
Full-spec A131 AH36 marine steel plates, 5–150mm thickness from stock
Width 1800–5500mm and length 3000–18000mm, custom sizes negotiable
Custom cutting, bending, welding, surface treatment and precision sizing
MTC, EN 10204 3.1 and ABS / CCS / LR / DNV third-party ship inspection certificates
Get Your ASTM A131 AH36 Shipbuilding Steel Quotation Now
Send us your thickness, width & length (or part drawings), quantity, impact test and classification society requirements. We will reply with the latest stock list, complete certification documents and competitive wholesale prices 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
