Sup-9 (5155)


SKU: N/A Categories: ,
Steel Tolerance Chart
FractionBuderus RangeFinished


High-quality SUP9 tool steel, renowned for its exceptional durability and versatility, is now available for sale at unbeatable prices. Crafted to meet the stringent standards of the knife industry, SUP9 guarantees top-notch performance, whether you’re creating heavy-duty blades or precision cutting tools. Don’t compromise on quality when you can have the best for less. Our SUP9 tool steel combines toughness, wear resistance, and corrosion resistance, making it the ideal choice for discerning buyers who value both excellence and affordability. Elevate your craftsmanship with SUP9 tool steel – quality you can trust at a price that won’t break the bank.

SUP9, also known as 5155 tool steel, is a versatile and widely used material in the knife industry. This alloy belongs to the family of chromium steels and is recognized for its exceptional durability and edge retention. One of its key characteristics is its close relation to various steel grades such as 55Cr3, 1.7176, SUP9A, 55C3, 527A60, 55CrMnA, G51550, and 51CrV4. This interconnection showcases the flexibility of SUP9 in meeting diverse industrial requirements.

The chemical composition of SUP9 includes a significant amount of chromium, which contributes to its corrosion resistance and enhances the overall strength of the steel. Its composition also includes manganese, promoting hardenability and ensuring a uniform hardness distribution throughout the material. This combination of elements makes SUP9 an ideal choice for knife manufacturing, where toughness, wear resistance, and corrosion resistance are crucial factors.

Knife makers appreciate SUP9 for its ease of heat treatment and the ability to achieve a desired level of hardness. This makes it adaptable to various knife designs, from heavy-duty blades to precision cutting tools. The steel’s toughness and resistance to deformation under stress make it a reliable option for blades that undergo rigorous use, ensuring longevity and reliable performance.

Moreover, SUP9’s close relationship with other steel grades, such as 55Cr3 and 51CrV4, allows for interchangeability in certain applications. This interchangeability provides manufacturers with options and flexibility, enabling them to choose the steel grade that best suits their specific requirements while maintaining similar characteristics.

In conclusion, SUP9 tool steel stands as a stalwart in the knife industry, cherished for its robustness, edge retention, and corrosion resistance. Its association with a variety of steel grades expands its applications, making it a top choice for knife makers seeking a reliable and versatile material for crafting high-quality blades.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Find our Suggested Sup-9 Heat Treat Here.

Listed below are our current LIVE and the most recently CLOSED material lot certifications per thickness:


Sup-9/5155 .156 (5/32")N/A300
Sup-9/5155 .187 (3/16")N/A309
Sup-9/5155 .250 (1/4")N/A312

You may also like…