Stainless steel used for fishing hooks, austenitic

I will write about the types of stainless steel used for fishing hooks .

I split it up because it seemed like it was going to be too long to write.

If we were to subdivide the types of stainless steel, the number would be quite large, so we will first narrow it down by type.

There are roughly three types: ① austenitic, ② ferritic, and ③ martensitic .

Of these, ① and ③ are used for fishing hooks (as far as we know).

I think a competitor manufacturer that went out of business voluntarily used ② in the past.

① In the case of austenitic materials.

It has the highest corrosion resistance without requiring any major surface treatment.

SUS304 fits into category ①, and I believe it is to blame for creating the image of "stainless steel = rust-proof."

Excellent workability = soft and lacks hardness and toughness.

This is also the reason why it has become commonplace and used in everyday items.

When used as a fishing hook, heat treatment is not possible, so the material is made thicker and work-hardened to increase its strength.

Simply making it thicker does not change its original properties, so it will easily deform if the maximum load is exceeded.

Work hardening is strength...or rather hardness.

This will increase, but adding stress will cause internal distortion, making the material more susceptible to breakage.

Austenitic stainless steel is used in stainless steel fishing hooks made overseas.

The shapes are not uniform, the traces of bending are clearly visible, and it does not rust.

Are these the characteristics of stainless steel fishing hooks made overseas?

We do not use austenitic stainless steel for our fishing hooks.

Only the welding ring is made of SUS304.

As expected, this is getting long, so I'll continue next time 😅