Tien-I's Reliable Material: Chrome Vanadium Steel
  • 2014-10-08

To make the good tools, you must select good quality steel. That's why Tien-I chose Chrome Vanadium Steel only from Taiwan.


Chrome Vanadium Steel is called CR-V. It is iron alloyed with Chrome and Vanadium. It shows high resistance to corrosion and suitable hardness. For example, in a European style sword the Chrome vanadium steel is much superior to simple carbon steel in overall strength at spring temper (50hrc). 


Edge-holding Advantage


Different steels have different edge holding capabilities. Chrome is a very hard metal, and adds hardness to steel. Vanadium is a brittle metal, adding toughness.  The end result is a steel that holds an edge but doesn't go dull after repeated use. Tien-I's tool made of CR-V can be more durable and resistance to corrosion. That's why you can see our hand-toolsocket marked CR-V.  


Carbon Steel = Low Quality Tools ?  

Carbon Steel is very common type of steel. The percentage of carbon will decide whether the steel is high, middle or low carbon steel.  With more carbon, the hardness of steel will go higher. Usually lower carbon steel is suitable for forging or die casting.

Most of DIY hand tools will go for this kind of carbon steel. It is cheap and easy to access. However, the durability of tool will not be longer and it is not suitable for precise processing. That's why Tien-I won't use this type of material for our clients.


A summary of the properties of some different steels

type of steel

iron alloyed with


typical use

low carbon steel

about 0.25 per cent carbon

easily shaped

car body panels

high carbon steel

up to 2.5 per cent carbon


cutting tools

stainless steel

chromium and nickel

resistant to corrosion

cutlery and sinks

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