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Dyneema Vs Amsteel?




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As a seasoned professional in the rigging and outdoor industry, I have seen the rise of synthetic ropes over the past few decades. Two popular synthetic ropes dominating the market today are Dyneema and Amsteel. The main question on everyone’s mind is: *Which is the better rope – Dyneema or Amsteel?* In this blog post, we will dive deep into the world of synthetic ropes, examining the similarities, differences, and ultimately determining which material reigns supreme.

Dyneema vs Amsteel: A Comprehensive Comparison

What is Dyneema?

Dyneema is a brand name for ultra-high-molecular-weight polyethylene (UHMWPE) fiber. It is produced by DSM, a Dutch multinational company. Dyneema is known for its impressive strength-to-weight ratio, resistance to abrasion, and low stretch properties. It is used in various applications like winch lines, rigging, yacht ropes, and personal protective equipment.

What is Amsteel?

Amsteel is a brand name for a type of rope made from Dyneema fibers. It is manufactured by Samson Rope Technologies, an American company. Amsteel ropes are a 12-strand braided rope made from Dyneema SK-75 fibers. The result is a lightweight, strong, and durable rope with a high strength-to-weight ratio.

Strength and Weight

Dyneema fibers are known for their incredible strength-to-weight ratio, and Amsteel ropes are no exception. When comparing the two, it is essential to note that Amsteel is made from Dyneema fibers. Therefore, the strength and weight properties of both materials are nearly identical. Dyneema ropes and Amsteel lines are both significantly stronger and lighter than traditional steel wire ropes.

Abrasion Resistance

Both Dyneema and Amsteel ropes have excellent resistance to abrasion due to the UHMWPE fibers. This resistance allows these ropes to withstand harsh conditions and maintain their strength over time. However, keep in mind that all synthetic ropes are more susceptible to abrasion than steel wire ropes.

UV Resistance

Dyneema fibers have inherent UV resistance, and Amsteel ropes benefit from this property as well. While not entirely immune to UV degradation, both Dyneema and Amsteel ropes can withstand prolonged exposure to sunlight without significant loss in strength.

Water Resistance and Buoyancy

Dyneema and Amsteel ropes do not absorb water, making them ideal for marine and water-based applications. Additionally, these ropes are buoyant and will float on water, making them easier to handle and retrieve in aquatic environments.

Flexibility and Knotability

Both Dyneema and Amsteel ropes are highly flexible and easy to handle. Amsteel ropes, in particular, are known for their excellent knotability and can be easily spliced, creating strong and secure connections. However, it is essential to be cautious when tying knots in these ropes, as some knots can significantly reduce their overall strength.


In general, Dyneema and Amsteel ropes are more expensive than traditional steel wire ropes or other synthetic options like polyester or nylon. However, the added benefits of strength, lightness, and durability often justify the higher price tag for many users.


Dyneema fibers are widely available and used in various ropes and products. Amsteel ropes, while also readily available, are a specific branded product made by Samson Rope Technologies. Depending on your location and specific needs, the availability of either option may vary.

Conclusion: Which Is Better – Dyneema or Amsteel?

Ultimately, Dyneema and Amsteel are both high-quality synthetic ropes with impressive properties that make them ideal for a wide range of applications.Since Amsteel ropes are made from Dyneema fibers, they share many of the same benefits and characteristics. The choice between the two often comes down to personal preference, specific needs, and availability. Here are ten key facts to keep in mind when choosing between Dyneema and Amsteel:

1.Dyneemais a brand name for UHMWPE fibers.
2.Amsteelis a brand name for a rope made from Dyneema fibers.
3. Both materials have an excellentstrength-to-weight ratio.
4. Dyneema and Amsteel ropes offer greatabrasion resistance.
5. Both ropes have inherentUV resistance.
6. Dyneema and Amsteel arewater-resistantandbuoyant.
7. Both materials are highlyflexibleandeasy to handle.
8. Amsteel ropes are known for their excellentknotabilityandspliceability.
9. Dyneema and Amsteel ropes are generally moreexpensivethan other synthetic ropes.
10.Availabilityof Dyneema and Amsteel products may vary depending on your location and specific needs.


Is Dyneema stronger than steel?

Yes, Dyneema is stronger than steel on a weight-for-weight basis. Dyneema is an ultra-high molecular weight polyethylene (UHMWPE) fiber that has exceptional strength-to-weight ratio, making it up to 15 times stronger than steel. However, it is important to note that steel has higher overall strength and stiffness, while Dyneema excels in tensile strength and flexibility.

What is the strength rating of Dyneema?

The strength rating of Dyneema, a high-performance polyethylene fiber, can vary depending on the specific grade and construction. However, it is known for its impressive strength-to-weight ratio, which is up to 15 times stronger than steel and 40% stronger than aramid fibers on a weight-for-weight basis. Dyneema has a tensile strength of approximately 2.4 to 5.5 GPa (gigapascals) and a specific tensile strength of around 55 to 128 N/tex. The exact strength rating depends on the type of Dyneema product being used, such as ropes, fabrics, or nets, and the intended application.

How much weight can Dyneema hold?

Dyneema is an ultra-high molecular weight polyethylene (UHMWPE) fiber known for its exceptional strength-to-weight ratio. The weight it can hold depends on the specific type and diameter of the Dyneema rope or cord being used. Generally, Dyneema ropes can have tensile strengths ranging from a few hundred to several thousand pounds. For example, a 1/8-inch diameter Dyneema rope can typically hold around 2,500 pounds, while a 1/4-inch diameter rope can hold around 8,000 pounds. It is crucial to consult the manufacturer’s specifications for the exact load-bearing capacity of a particular Dyneema product.

What is a safe working load of Dyneema?

The safe working load of Dyneema depends on the specific type, size, and construction of the rope or line being used. Generally, the safe working load is approximately 20-25% of the rope’s minimum breaking strength. For example, if a Dyneema rope has a minimum breaking strength of 10,000 lbs, its safe working load would be around 2,000-2,500 lbs. It is essential to consult the manufacturer’s guidelines for the specific Dyneema product being used to ensure safety and proper usage.

What is the breaking strength of Dyneema?

The breaking strength of Dyneema varies depending on the specific type, construction, and diameter of the rope or cord. Generally, Dyneema ropes have a breaking strength ranging from 1,500 lbs (680 kg) to over 100,000 lbs (45,359 kg) for larger diameters. Dyneema is known for its high strength-to-weight ratio, making it one of the strongest synthetic fibers available. It is important to note that the actual breaking strength of a specific Dyneema product should be obtained from the manufacturer.

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