Welded Painted A345 Us Type Master Link Assembly

• Customization: Available
• Material: Alloy Steel
• Shape: A345 Us Type
• Model NO.: Mooring Connection Hardware
• Usage: Industrial, Household, Mooring/Lifting
• Color: Red/Yellow/Blue/Green/Painted
• Condition: New
• Grade: G80/G100/G70
• Application: Lifting Fittings/Mooring Connector
• Lead Time: 15-30days
• Certificates and Inspection: Mill Test Certificate
• Treatment: Quenched and Tempered
• Standard: En1677-4
• Transport Package: Pallet/Strong Woven Bag/Carton
• Specification: 3/4′-2 3/4′
• Trademark: Haosail
• Origin: China
• HS Code: 73269090
• Production Capacity: 1000tons/Year

Product Description

Product Description

A345 US TYPE MASTER LINK ASSEMBLY

1. Material: Forged supper alloy steel
2. 100% tested at 2 times of working load limit
3. 100% MPI for crack detection
4. Breaking load test for samples of each batch
5. For chain sling:Minimum breaking load is 4 times of WLL
6. For wire rope sling:Minimum breaking load is 5 times of WLL
7. The pressing flat is designed for the connecting with G80 Omega link,and there will be pressing flat only on request.

Introduction of A345 US TYPE MASTER LINK ASSEMBLY

The A345 US TYPE MASTER LINK ASSEMBLY, namely the American - style A345 master link assembly, is introduced as follows:
1. Materials
It is made of forged super alloy steel. This material features high strength, high toughness, and excellent wear - resistance, ensuring stable performance under various harsh working conditions.
2. Inspection Standards
(1)Working Load Test: 100% of the products are tested under 2 - times the working load limit to ensure their safety and reliability in actual use.
(2)Flaw Detection Inspection: 100% of the products undergo Magnetic Particle Inspection (MPI) to detect cracks, guaranteeing that there are no internal defects.
(3)Breaking Load Test: Breaking load tests are carried out on samples of each batch to ensure that the product quality meets the standards.
3. Application Scenarios
It is mainly used in chain slings and wire rope slings in the hoisting and lifting industry. It is suitable for 3 - leg and 4 - leg chain slings, providing reliable connection and load - bearing support for hoisting operations.
4. Performance Parameters
(1)Minimum Breaking Load: When used for chain slings, the minimum breaking load is 4 times the Working Load Limit (WLL). When used for wire rope slings, the minimum breaking load is 5 times the Working Load Limit.
(2)Size Specifications: There are various sizes available, such as 3/4 inch, 7/8 inch, 1 inch, etc. Different sizes correspond to different weights, working loads, and physical dimensions. Taking the 3/4 - inch size as an example, the weight is 1.70 kg, corresponding to the American chain size of 1/4 inch or 5/16 inch. The working load for 3 - or 4 - chain (at an angle of 0 - 45°) is 3.15 t or 4.25 t, and the working load for wire ropes is 5.6 t. Its dimensional parameters are as follows: A is 140 ± 6 mm, B is 70 ± 5 mm, D is 20 ± 1 mm, etc.
5. Structural Features
It consists of a forged main ring and a welded sub - ring. This structural design not only ensures the strength and stability of the master link but also facilitates installation and disassembly, enabling it to meet different hoisting requirements.

Detailed Photos

Productive process and workshop:
1. Raw material preparation
(1) Material selection: According to the use requirements and performance characteristics of the main chain ring, select the appropriate alloy material, such as alloy steel containing chromium, nickel, molybdenum and other elements, to ensure that the material has good strength, toughness, corrosion resistance and other properties. Common materials are alloy steel such as A342.
(2) Inspection and acceptance: Strict inspection of the purchased raw materials, including chemical composition analysis, mechanical property testing, metallographic structure inspection, etc., to ensure that the materials meet the design requirements and related standards.
(3) Cutting: According to the size and weight requirements of the main chain ring, use cutting equipment (such as flame cutting machine, plasma cutting machine, sawing machine, etc.) to cut the raw material into a suitable blank, and the cutting size should consider the processing allowance during the forging process.
2. forge
(1) Heating billet: the billet is heated to the appropriate forging temperature range, different alloy materials forging temperature is different, generally around 1000ºC-1200ºC. The heating method is usually gas heating furnace, electric heating furnace, etc., to ensure uniform heating of the billet.
(2) Pre-forging: Put the heated billet into the forging equipment (such as air hammer, friction press, hydraulic press, etc.) for preliminary forging, through several upsetting, drawing and other operations, improve the internal organization of the billet, make it more dense and uniform, and lay the foundation for the subsequent forming forging.
(3) Forming forging: The special forging die is used to further forge the pre-forged blank, so that it gradually forms the basic shape of the main chain ring. In the forging process, it is necessary to strictly control the forging ratio, forging speed, forging pressure and other parameters to ensure the dimensional accuracy and internal quality of the main chain ring.
(4) Trimming: The forged main chain ring may have flash, burr and other defects, need to use punching machine, grinder and other equipment to trim, remove excess material, make the surface of the main chain ring smooth, size in line with the design requirements.
Heat treatment
(5) Quenching: the forged main chain ring is heated above the critical temperature, and is cooled rapidly after holding for a certain time to obtain high-strength tissues such as martensite and improve the strength and hardness of the main chain ring. The quenching cooling medium is usually water, oil or other special quenching agent, and the control of cooling speed is crucial to the performance of the main chain ring.
(6) Tempering: There is a large internal stress inside the main chain ring after quenching, and the organization is unstable, and it needs to be tempered. Tempering is to heat the main chain ring to a certain temperature range below the critical temperature, and slowly cool it after holding it for a period of time to eliminate internal stress, stabilize the organization, improve toughness, and improve the comprehensive mechanical properties of the main chain ring.
3. machining
(1) Roughing: Using lathe, milling machine, drilling machine and other mechanical processing equipment, the main chain ring after heat treatment is roughed, and the connecting hole and mounting surface of the main chain ring are processed, leaving a processing margin of about 0.5mm-1mm for subsequent finishing.
(2) Finishing: The use of high-precision processing equipment and advanced processing technology, such as CNC machining center, to finish the main chain ring to ensure that the dimensional accuracy of the connecting hole, surface roughness and the overall dimensional accuracy and shape and position tolerance of the main chain ring meet the design requirements.
(3) Surface treatment: According to the use environment and performance requirements of the main link, the surface of the main link is treated, such as electroplating, hot dip galvanizing, spraying anti-corrosion coating, etc., in order to improve the corrosion resistance and wear resistance of the main link and extend the service life.
4. Quality inspection
(1) Appearance inspection: Use visual inspection or tools such as magnifying glass to check the appearance of the main chain ring to see whether there are cracks, sand holes, pores, lack of meat and other defects, and whether the surface roughness meets the requirements.
(2) Size measurement: Use measuring tools (such as calipers, micrometers, coordinate measuring instruments, etc.) to measure the key dimensions of the main chain ring to ensure that the size deviation is within the range specified in the design and standards.
(3) Mechanical properties test: According to relevant standards and requirements, the mechanical properties of the main link are tested, including tensile test, impact test, hardness test, etc., to verify whether the main link meets the strength, toughness and other performance indicators required for use.
(4) Non-destructive testing: The use of non-destructive testing technology, such as ultrasonic testing, magnetic particle testing, penetration testing, etc., to detect the internal defects of the main chain ring, timely find the possible cracks, inclusions and other defects, to ensure the quality and safety of the main chain ring.
5. Assembly and packaging
(1) Assembly: Assemble the verified main chain ring with other supporting parts (such as pin, cotter pin, etc.) to ensure that the connection is firm and reliable, and the main chain ring can be used normally after assembly.
(2) Packaging: After cleaning the assembled main chain ring, appropriate packaging materials (such as wooden boxes, cartons, plastic films, etc.) are used for packaging to prevent damage and corrosion during transportation and storage. At the same time, the specification, model, quantity and production batch of the main chain ring are marked on the package.
Our inspection:
We have mechanical laboratory covers an area of 1000 square meters, equipped with 6300KN multi-function tensile testing machine, Spark-OES, Metallurgical micropscope, universal testing machine, automcatic impact testing machine, salt spary test machine, by testing materials, microstructure, mechanical properties and product functions, the quality is guaranteed to meet the standard requirements. Our laboratory is internation CNAS certified.
We ensure that each batch of products will provide you with detailed inspection photos or videos.

Product Parameters

Stock No.

Size (IN)

Weight (KG)

American chain (IN)

3 or 4 chain working load (the angle 0-45°)(T)

Rope working load (T)

A (MM)

B (MM)

D (MM)

a (MM)

b (MM)

d (MM)

Regular marking

Production way

HS1020401

3/4

1.70

1/4

3.15

5.6

140±6

70±50

20±1

85±5

40±3

14±1

WLL4.25T

Mother ring forging Sub ring welded

HS1020401

3/4

1.70

5/16

4.25

5.6

140±6

70±50

20±1

85±5

40±3

14±1

WLL4.25T

Mother ring forging Sub ring welded

HS1020402

7/8

2.18

5/16

4.25

6.9

160±6

95±5

22±1

85±5

40±5

14±1

WLL6.7T

Mother ring forging Sub ring welded

HS1020402

7/8

2.18

3/8

6.7

6.9

160±6

95±5

22±1

85±5

40±5

14±1

WLL6.7T

Mother ring forging Sub ring welded

HS1020403

1

3.29

3/8

6.7

11.8

178±6

89±5

25±1

100±5

60±5

18±1

WLL6.7T

Mother ring forging Sub ring welded

HS1020404

1 1/4

7.18

1/2

11.2

17.7

200±7

110±6

32+1-2

100±5

60±5

22±1

WLL17T

Mother ring forging Sub ring welded

HS1020404

1 1/4

7.18

5/8

17

17.7

200±7

110±6

32+1-2

100±5

60±5

22±1

WLL17T

Mother ring forging Sub ring welded

HS1020405

1 1/2

12.91

5/8

17

27.7

267±7

135±6

38+1-2

180±6

100±5

30+1-2

WLL23.6T

Mother ring forging Sub ring welded

HS1020405

1 1/2

12.91

3/4

23.6

27.7

267±7

135±6

38+1-2

180±6

100±5

30+1-2

WLL23.6T

Mother ring forging Sub ring welded

HS1020406

1 3/4

21.25

3/4

23.6

38.5

305±10

152±6

45+1-2

180±6

100±5

32+1-2

WLL31.5T

Mother ring forging Sub ring welded

HS1020406

1 3/4

21.25

7/8

31.5

38.5

305±10

152±6

45+1-2

180±6

100±5

32+1-2

WLL31.5T

Mother ring forging Sub ring welded

HS1020407

2

30.34

7/8

31.5

46.5

356±10

178±6

50+1-2

180±6

100±5

38+1-2

WLL31.5T

Mother ring forging Sub ring welded

HS1020408

2 1/2

64.40

1

45

72.6

406±10

203±6

64+1-2

355±8

178±6

51+1-2

WLL45T

Mother ring forging Sub ring welded

HS1020409

2 3/4

89.00

1 1/4

67

98.4

406±10

241±6

70+1-2

406±8

203±6

57+1-2

WLL67T

Mother ring forging Sub ring welded

Certifications

Haosail will provide Mill cert and inspection report and steel material quality certificate for goods.

 

Packaging & Shipping

 

Company Profile

 

Qingdao Haosail machinery Co., Ltd is a Chinese company that specializes in synthetic solutions for the Offshore oil&gas, Marine, Aquaculture industries. From marine deck equipment, moorings solution to hardware to lifting slings Haosail has the answer.
We have combined experience on Overall project design, resource integration and quality control backed up by continuous successes and sound engineering experience and input. We can do product design and complete set of connecting design to meet client's requirement, by given usage environment, tensile and construction requirement and etc.We have participated in the design and provision of overseas Marine engineering, dock anchorage mooring project products, dock dock ship repair supporting products, etc.
At the same time,reliability in the marine and mooring industry have enabled Haosail to build up a superior network of factories and contractors that Haosail can offer throughout the Oceanic region.

 

Haosail can supply a range of products:
√  Anchor, Anchor Chain and accessaries
√  Marine Deck Fittings(Chock, Bollard, Fairleader and etc)
√  Mooring Rope and Buoy
√  Mooring systems
√  Heavy Lift Synthetic Slings
√  Deck and Quayside Fittings
√  Lifting Chain and Fitting
√  Wire Rope Fittings
√  Rigging Hardware
√  Lifting and Hoisting equipment
√  Heavy Lift Synthetic Slings

Our Advantages

Haosail's Supply Chain Management Team, Quality Management System and kinds of Testing Equipments ensure complete confidence in the products and services provided, and to ensure customer satisfaction.

√   Getting things right first time
√   Know kinds of factory well, know their production capacity and advantages, resource allocation, can quick response to all kinds of problems.
√   Develop product cost model independently, get hold of product cost composition
√   Overall optimization design, reduce the cost and the risk
√   Offer products and services that are better in quality or performance than those offered by the competition
√   Customer specifications strictly observed and fulfilled.

We can Technical Design:
Our team have a depth of technical ability and knowledge gained through many years of experience in lifting, rigging and safety. We can provide common lifting design, heavy work lifting design, and can non-standard product lifting design to meet customer needs.
We can do Training:
In order to better serve customers, our company specially organized professionals to carry out training in lifting design, lifting product introduction and use, and lifting product maintenance.
 

FAQ

1. Question: What aspects of the forged alloy master link need to be inspected daily?
   Answer: It is necessary to check whether there are defects such as cracks, wear, deformation, and corrosion on the appearance of the master link. Measure its key dimensions to ensure they are within the specified range. Check whether the connection parts are loose, such as whether the pins, split pins, etc. are in place and firmly connected.
2. Question: How to clean the forged alloy master link?
   Answer: Generally, a clean cloth or brush can be used to remove dust, oil stains, and debris from the surface of the master link. If there are stubborn stains or rust marks, a mild cleaning agent can be used, but corrosive substances such as strong acids and alkalis should be avoided to prevent damage to the protective layer on the surface of the master link. After cleaning, it should be dried in a timely manner to prevent water residue from causing rust.
3. Question: Does the forged alloy master link need lubrication? If so, what kind of lubricant should be used?
   Answer: Usually, lubrication is required, especially for the connection parts and areas prone to friction. High - performance lubricants suitable for metal parts can generally be used, such as lubricants containing components like molybdenum disulfide and graphite. These lubricants can form a good lubricating film on the metal surface, reducing friction and wear.
4. Question: How should the forged alloy master link be stored?
   Answer: It should be stored in a dry and well - ventilated environment, avoiding humidity and corrosive gases. It is best to hang it or place it on a special support to avoid mutual extrusion and collision, preventing deformation or damage. If it is stored for a long time, anti - rust oil can be applied to the surface or other anti - rust measures can be taken, and the anti - rust situation should be checked regularly.
5. Question: How to prevent the forged alloy master link from corrosion?
   Answer: In addition to choosing alloy materials with good corrosion resistance, keep the surface of the master link clean and dry and avoid contact with corrosive substances. If damage to the surface protective layer is found, such as coating peeling or zinc - plating damage, it should be repaired in a timely manner or re - surface - treated, such as repainting anti - corrosion paint or re - galvanizing.
6. Question: Can the forged alloy master link with minor damage be used continuously?
   Answer: If there are minor damages such as slight wear and scratches, after professional evaluation, it can be used continuously on the premise that it does not affect the strength and performance of the master link, but enhanced monitoring is required. If serious problems such as cracks and severe deformation occur, it must be stopped from being used immediately, and repaired or replaced.
7. Question: What tests need to be carried out after the repair of the forged alloy master link?
   Answer: After the repair of the master link, an appearance inspection is required to ensure that the repaired part is well - repaired and there are no new defects. Key dimensions should be measured to ensure they meet the requirements. Nondestructive testing, such as ultrasonic testing and magnetic particle testing, should be carried out to check whether there are internal defects such as cracks. Mechanical property tests, such as tensile tests, may also be required to verify whether its performance has been restored to the specified standard.