Marine Bulwark Chock ZG230-450 Steel ISO13729 GB/T11352-2009 Standard

Material and Manufacturing:

Material Advantages:

1. **Superior Mechanical Properties**:Tensile strength up to 450MPa and yield strength of 230MPa ensure excellent load-bearing capacity, adapting to harsh marine operating conditions.
2. **Strong Corrosion Resistance**:Natural anti-corrosion performance against seawater, humidity and salt spray, reducing maintenance frequency and extending service life.
3. **Excellent Casting Performance**:Uniform structure and high dimensional accuracy after casting, ensuring tight fit with marine hardware and stable operation.
4. **Compliance with Dual Standards**:Fully meets GB/T11352-2009 and ISO13729 requirements, qualified for global marine equipment supporting and import-export trade.

Manufacturing Process:

1. **Raw Material Selection & Inspection**:Adopt high-purity ZG230-450 steel billets that comply with GB/T11352-2009, conduct chemical composition and mechanical property testing to eliminate unqualified materials.
2. **Precision Casting Molding**:Use lost wax casting technology to create high-precision molds, ensuring the chock’s structural consistency and dimensional accuracy (tolerance ≤±0.5mm).
3. **Melting & Pouring**:Smelt steel billets in an electric arc furnace under controlled temperature (1500-1550℃), perform vacuum pouring to avoid air bubbles and impurities in the casting.
4. **Heat Treatment**:Carry out normalizing and tempering processes to optimize the steel’s internal structure, enhance tensile strength and toughness, meeting ISO13729 mechanical performance requirements.
5. **Machining & Finishing**:Precision machine key surfaces (such as the cable contact area) with CNC equipment, then conduct deburring, sandblasting, and anti-rust painting to improve corrosion resistance.
6. **Multi-stage Quality Inspection**:Inspect dimensions, surface defects, and mechanical properties through 3D scanning, ultrasonic testing, and tensile testing, ensuring 100% compliance with dual standards before delivery.

Features:

1. **Dual Standard Compliance**:Strictly meets international ISO13729 and national GB/T11352-2009 standards, fully compatible with global marine equipment supporting needs.
2. **High-Strength Material Foundation**:Made of ZG230-450 steel with excellent yield and tensile strength, resisting deformation under heavy cable loads in harsh marine environments.
3. **Marine-optimized Durability**:Anti-corrosion surface treatment combined with the steel’s inherent resistance to seawater and salt spray, ensuring long service life with low maintenance.
4. **Precision-fit Design**:Advanced casting and CNC machining guarantee tight dimensional tolerance, enabling seamless installation with ship bulwarks and stable operation.
5. **Safety-focused Structure**:Smooth cable contact surfaces reduce wear on marine cables, while the robust integral structure prevents structural failure during navigation.
6. **Wide Application Scope**:Suitable for cargo ships, passenger ships, and offshore platforms, adapting to various marine operation scenarios.

Technical Parameters:

Application Scenarios:

1. Commercial Cargo Vessels
As a core cable-guiding component for commercial cargo vessels (including bulk carriers, container ships, and oil tankers), it is mainly installed on the bulwark of the cargo hold area and the deck edge. It is used for guiding and fixing mooring cables, loading and unloading cables during berthing, loading and unloading of goods, and navigation. The high tensile strength of ZG230-450 steel can withstand the huge tension of the cables when the cargo vessel is moored in stormy waves or loaded with heavy cargo, and the anti-corrosion performance can resist the erosion of seawater and cargo residues for a long time. It is suitable for cargo vessels of 10,000-100,000 DWT, and can meet the high-frequency use needs of port berthing and long-distance navigation.

2. Passenger Ships & Cruise Ships

In passenger ships and cruise ships, it is installed on the bulwark of the upper deck, bow and stern areas, and is used for mooring, anchoring and emergency cable guiding. The product adopts precision casting and CNC machining, with smooth surface and no burrs, which can avoid abrasion to the mooring cable and ensure the safety of passengers during berthing. At the same time, its compact structure and beautiful appearance are consistent with the overall decoration style of cruise ships. It can adapt to the frequent berthing of passenger ships in coastal tourist ports and the long-term navigation in offshore waters, and the service life can reach more than 10 years under normal maintenance.

3. Offshore Platforms & Drilling Rigs

In offshore oil platforms, wind power platforms and drilling rigs, it is an essential cable-guiding and fixing component, installed on the platform bulwark, operation area and equipment fixing points. These scenarios have harsh environmental conditions, such as strong wind, heavy waves, high salt spray and alternating high and low temperatures. The ZG230-450 steel after heat treatment has excellent toughness and fatigue resistance, which can resist the continuous impact of waves and wind loads. It is mainly used for guiding the mooring cables of the platform, fixing the cables of offshore operation equipment and emergency rescue cables, ensuring the stable operation of the offshore platform and the safety of operation personnel.

Support and Services:

Standardized Warranty System: Most industrial and machinery products on the platform follow a standard 1-year warranty, with some high-value equipment offering warranties up to 3 years. For critical equipment like marine mooring systems, free repair or parts replacement services are available for non-human-caused quality issues such as material cracking or structural deformation within the warranty period.

Multilingual Dedicated Service Support: A multilingual buyer service team of over 200 people covers multiple languages ​​including English, Arabic, and Russian, suitable for after-sales communication in cross-border procurement. It also assists both suppliers and buyers in conducting video conferences to resolve after-sales issues such as equipment installation and troubleshooting face-to-face.

 
In addition, we offer a range of services to complement our mooring bollards products. These include custom design and engineering, installation and commissioning, and repairs and upgrades. Our goal is to provide a comprehensive solution to meet your mooring needs, from product selection to ongoing support.
Any question please let us know ,our JinCheng maritime will provide you the best service with 7*24 hours ~