HSS saw blade wtih Blue plus coating.  
(Italy call it Bravo Blu)
Made by new material HSS-DMCo05(Co 0.5%)

Specification: Diameter 32-600mm, bore 25.4-50mm, thickness 0.3-5.0mmSurface treatment: Original.VAPO, TIN and etc.Tooth form: A, BW,C .etc.Blade material:M2,M35 and other special high speed steel.Blade application: Are used on manual,semi-auto,full-auto sawing machines to cut different steel materials and alloys in tube or profiles.

Provides you Exterior coating
Special Oxidating-VAPOIt produces a layer of iron oxdie (FeO) on the surface, which increasesthe wear-resisting and increases the overall life. Suitable for general cutting work.

Titanium Nitrider coating-TINThis is an excellent PVD coating for protecting saw blades form wear, which is a good choice for iron based materials and cutting conditions requiring resistance to both abrasive and adhesive wear.

Titanium Aluminum Nitride Coating-TILANTIALN is a new mult-layer wear protection PVD coation, Recommended for high tensile strength materials above 800N/mm and stainless steel , Responds very facourably to high speed and feed rates as rates well as extreme working conditions like dry cutting

Titanium Carbonit Nide Coaring-TICH TICH is a " high performance" PVD coating suitable for severe abrasive wear cutting conditions. Recommended for high tensile strength materials above 800N/mm and stainless steel. Especially for cutting the material in high speed and feed rates. Coating thickness 0.003Chromium

Nitride Coating-CrN CrN is a specialized PVD coating that resists adhesive wear, corrosion and oxidation. Strongly Recommended for cutting copper and titanium. It has obtianed achievements in cutting off operations of brass, bronze and other light alloys.