<p>First of all, the 300 or 700 is the grade value of carbon fiber and generally, a higher grade means more strength and better performance. The main differences between T300 (3k) carbon and T700 carbon are that T700 carbon has almost 40% more tensile strength than 3k carbon, T700 carbon is slightly denser (and thus heavier for the same volume of carbon), T700 carbon fiber has a higher carbon content and a lower nitrogen content, and T700 carbon fiber is smoother looking while T300 carbon looks more bark-like. </p>

<p>So, overall, T700 carbon is better for making a drone frame because it is significantly stronger with only a small increase in weight. </p>

CC BY-SA 4.0
2023-01-31T13:10:18.970Z
T300 is not the same as 3k. 3k refers to the number of filaments in each tow, not the material used: https://www.nj-mkt.com/news/861.html
Robin Bennett
CC BY-SA 4.0
2020-04-23T22:01:18.113Z
2020-04-23T22:01:18.113Z
Jacob B
<p>The &quot;T&quot; stands for <a href="https://www.toraycma.com/products/carbon-fiber/" rel="nofollow noreferrer">Toray Composite &quot;TORAYCA&quot; carbon fiber</a> The frame probably uses T700G, based on the applications Toray has listed for the 2 types of T700.
T700 is also the fiber itself, and not the weave.</p>

CC BY-SA 4.0
2023-01-31T03:22:38.577Z
2023-01-31T13:09:18.597Z
2023-01-31T13:09:18.597Z
Abandoned Tech
<p>T700 and 3K are different indication.
T700 indicate the strength of the frame (higher strength/weight ratio) 3k usually means the number filaments on the surface layer.
You can have a carbon fiber sheet T700 3K</p>

CC BY-SA 4.0
2023-01-31T13:13:49.523Z
This was downvoted, but seems to be fundamentally correct: https://www.estcarbon.com/blog/carbon-fiber-what-is-k/ or  https://www.nj-mkt.com/news/861.html or https://www.nextie.com/difference-between-weaves-UD-3K-12K
Robin Bennett
CC BY-SA 4.0
2020-11-04T03:20:09.373Z
2020-11-04T03:20:09.373Z
Diogenes
<p>I have heard that iflight's Green Hornet uses T700 carbon instead of 3k carbon. What difference does the new T700 carbon make?</p>

<drone-frame><material>
Difference between T700 carbon frames and 3k carbon frames?
Jacob B
# Difference between T700 carbon frames and 3k carbon frames?

(Asked by: username_0 on 2020-04-23)

I have heard that iflight's Green Hornet uses T700 carbon instead of 3k carbon. What difference does the new T700 carbon make?

**Tags:** drone-frame, material


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## 3 answers

### Answer by username_0 on 2020-04-23. Score: 0 | Accepted answer

First of all, the 300 or 700 is the grade value of carbon fiber and generally, a higher grade means more strength and better performance. The main differences between T300 (3k) carbon and T700 carbon are that T700 carbon has almost 40% more tensile strength than 3k carbon, T700 carbon is slightly denser (and thus heavier for the same volume of carbon), T700 carbon fiber has a higher carbon content and a lower nitrogen content, and T700 carbon fiber is smoother looking while T300 carbon looks more bark-like.

So, overall, T700 carbon is better for making a drone frame because it is significantly stronger with only a small increase in weight.

> **Comments:**
> **username_1**: T300 is not the same as 3k. 3k refers to the number of filaments in each tow, not the material used: https://www.nj-mkt.com/news/861.html  

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### Answer by username_2 on 2023-01-31. Score: 1

The "T" stands for [Toray Composite "TORAYCA" carbon fiber](https://www.toraycma.com/products/carbon-fiber/) The frame probably uses T700G, based on the applications Toray has listed for the 2 types of T700.
T700 is also the fiber itself, and not the weave.


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### Answer by username_3 on 2020-11-04. Score: 0

T700 and 3K are different indication.
T700 indicate the strength of the frame (higher strength/weight ratio) 3k usually means the number filaments on the surface layer.
You can have a carbon fiber sheet T700 3K

> **Comments:**
> **username_1**: This was downvoted, but seems to be fundamentally correct: https://www.estcarbon.com/blog/carbon-fiber-what-is-k/ or  https://www.nj-mkt.com/news/861.html or https://www.nextie.com/difference-between-weaves-UD-3K-12K  

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