G80 vs G70 Chain: Key Differences in Lifting & Transport Chains
In industrial lifting and freight transportation, chains are a core element for load safety and efficiency. Different grades of chain, varying by implementation standards, manufacturing processes, and load-bearing performance, are widely used in applications such as lifting, transport, and securing.
As representatives of high-strength products, G80 and G70 chains share similarities but also significant differences in technical specifications, surface treatment, and application targets. Selecting the appropriate grade of chain is crucial for ensuring operational safety and improving efficiency. This article will provide a professional perspective on the core features, implementation standards, and application scenarios of the two, comparing the differences to assist with selection and facilitate search engine crawling, addressing key trends in industrial chain selection.
International Demand Distribution :
Europe and the United States dominate the high-end market, while Chinese exports win with cost-effectiveness.
In Europe, Germany, the United Kingdom, France, and other countries have a high demand for G80 chains, which are used for industrial lifting and heavy equipment hoisting, and comply with the EN818-2 standard. North America: The US and Canadian markets prefer G70 chain for freight lashing and vehicle securing, with ASTM standard certification being a key entry point.
Asia: Japan and South Korea maintain stable demand for G80 chain, emphasizing high-precision manufacturing and long-term durability. Emerging markets such as India and Vietnam are seeing increasing imports of G70 chain annually due to infrastructure development.
Middle East and Australia: Countries like Australia and Saudi Arabia, with their developed mining and logistics industries, are demanding both G80 (lifting) and G70 (transportation) chains.
China's Exports :
China is the world's largest producer of industrial chains, accounting for over 30% of global G80 and G70 chain exports, primarily to Russia, the US, Germany, Canada, the UK, Japan, Turkey, Belgium, India, and Vietnam.
G80 Chain: The Standard Load-Bearing Model in the Lifting Industry
G80 is the mainstream specification for high-strength lifting chains, occupying a core market share in industrial lifting and hoisting operations.
G80 Chain Materials and Standards :
Designed specifically for hoisting rigging and general lifting operations, the chain is made of 20Mn2 and strictly adheres to the European EN818-2 standard, which specifies detailed and stringent specifications for dimensional parameters, working load limit (WLL), mechanical properties, test methods, and marking requirements.
G80 Chain Manufacturing Process :
The round steel link chain is manufactured using a resistance welding process to ensure connection strength and stability. Heat treatment strengthens the chain to enhance mechanical properties. Each chain is individually inspected to ensure consistent product performance and provide reliable support for safe lifting operations.
G80 Chain Load System :
Minimum Breaking Force (MBL): 4 times the WLL, a key parameter for measuring chain strength, reflecting the maximum tensile force it can withstand under extreme conditions.
Factory Test Load (MPF): 2.5 times the WLL is used to ensure that the chain meets quality requirements before it is put into service.
G80 Chain Size Coverage :
The standard range is 4-45mm, with mainstream sizes available in the market ranging from 6-32mm, meeting the size requirements of various lifting scenarios.
G80 Chain Application Scenarios :
Suitable for industrial applications such as crane hoisting systems, heavy equipment lifting at docks, and metallurgical and mining operations subject to dynamic impact loads. Its unique heat treatment process and rigorous quality inspection procedures ensure reliable safety for high-altitude operations, making it a key component in these applications.
G80 Chain Service Life :
With proper use and maintenance, it can reach 5-10 years. The manganese steel material and medium-frequency heat treatment process enhance wear resistance, but dynamic impact loads from high-altitude operations can shorten its service life, requiring regular testing (e.g., elongation every 6 months).
G80 Chain International Standard Certification :
It must comply with standards such as EN818-2 (Europe), ISO3077 (International), and AS2321 (Australia), emphasizing dynamic load testing and fatigue life.
Frequently Asked Questions (FAQs) :
Q1: Is G80 chain the same as "Grade 8"?
A: Yes. In the engineering field, Grade 8 short-link lifting chain is often referred to as G80 chain. The core standard is EN 818-2. Q2: What is the standard size range for G80 chain?
A: The EN 818-2 standard covers sizes from 4 to 45 mm; sizes commonly available on the market range from 6 to 32 mm.
Q3: What is the relationship between WLL and MBL?
A: WLL stands for the permissible working load; minimum breaking force (MBL) = 4 × WLL.
Q4: What are the WLL values for commonly used diameters?
A: For example, 10 mm = 3.15 t, 13 mm = 5.30 t, 16 mm = 8.0 t, and 26 mm = 21.2 t.
G70 Chain : A Professional Tool for Transport Securing
Among transport securing chains, the G70 represents a high-end offering, with a relatively dispersed market share, concentrated in applications such as freight and container lashing. Its 4:1 safety factor (optimized for static loads) and ASTM standard certification make it irreplaceable for ground operations. Electrogalvanizing and yellow passivation enhance corrosion resistance, while the golden appearance allows for quick grade identification, reducing on-site operational risks.
G70 Chain Material and Standards :
This Grade 70 high-strength transport chain complies with ASTM standards and is primarily used for cargo transport, vehicle securing, and non-lifting lashing operations. We provide authoritative technical guidance for this application.
G70 Chain Material and Strength :
The material is 20Mn2, and its tensile strength significantly exceeds that of standard G43 transport chain, meeting the high-strength requirements of transport and securing operations.
G70 Chain Safety Factor and Surface Treatment :
Safety Factor: A design safety factor of 4:1, optimized for static load conditions, ensures safe and reliable cargo loading during transport and securing.
Surface Treatment: Electrogalvanizing and yellow passivation give the chain a golden appearance, combining corrosion resistance with grade identification, extending its service life and facilitating identification by on-site personnel. Common Sizes and Working Load Limits (WLLs)
Common Sizes: 8–13 mm are common sizes on the market, with 8 mm, 10 mm, and 13 mm being the most popular, meeting the size requirements of various cargo transport and securing scenarios.
Working Load Limits (WLLs): The WLLs for different diameters are as follows: 8 mm = 2.13 t, 10 mm = 3.0 t, and 13 mm = 5.13 t.
G70 Chain Applications :
As specialized tools for transport and securing operations, these heavy-duty lashings, with their high-strength design and advanced surface protection technology, play a key role in freight transport, container lashing, and truck securing, and are a crucial component in ensuring cargo transportation safety.
G70 Chain Service Life :
The service life is typically 3–8 years, depending on the operating environment (e.g., salt spray corrosion and UV exposure). Electroplated zinc coating can extend the service life, but any damage requires immediate replacement to prevent rust and reduced strength.
G70 Chain International Standard Certifications :
Requires certifications such as ASTM A952 (USA) and DIN766 (Germany), focusing on static load and corrosion resistance.
Frequently Asked Questions (FAQs) :
Q1: Are G70 chain and "Grade 70" the same thing?
A: Yes, Grade 70 high-strength transport chain is often referred to as G70 chain in engineering applications and is commonly used in cargo securing.
Q2: What are the common sizes of G70 chain?
A: Common sizes on the market range from 8 to 13 mm, with 8 mm, 10 mm, and 13 mm being the most popular.
Q3: What is the working load limit (WLL) of G70 chain?
A: The WLL for different diameters is as follows: 8 mm = 2.13 t, 10 mm = 3.0 t, and 13 mm = 5.13 t.
Q4: Why is G70 chain often golden yellow?
A: The surface is zinc-plated and yellow passivated to increase corrosion resistance, making it easier to distinguish between different grades of chain and improving on-site operation efficiency and safety.
Differentiated G70 and G80 Chain Designs: Precisely Addressing the Needs of Specific Applications
The differentiated designs of the G70 and G80 chains demonstrate the precise application of industry standards. Based on the European EN 818-2 standard, the G80 chain utilizes resistance welding and a comprehensive heat treatment process, setting a benchmark for safety in high-altitude lifting applications. Its dynamic load-optimized design, guaranteed 4x WLL breaking strength, and rigorous EN 818-2 certification make it the preferred choice for applications requiring impact loads, such as crane lifting and dock operations.
Based on the ASTM standard system, the G70 chain utilizes an electrogalvanizing and yellow passivation process for both surface protection and grade identification, achieving a balanced efficiency and cost-effectiveness in transport securing applications. Its 4:1 safety factor and golden exterior markings precisely meet the needs of ground operations such as truck lashing and container securing, providing reliable support for cargo transport securing.
While both G70 and G80 chains fall into the high-strength category, they differ significantly in design concepts, inspection standards, and application scenarios. When selecting a chain, adherence to the principles of "scenarios-specific adaptation, standards compliance, and dedicated chain" is crucial to avoid potential risks from misuse and ensure safe and efficient industrial operations. This also aligns with current industry trends and demands for precise selection and safe production.
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