Romay Grades Explained

Ceramic Grades
CC-10
Our White alumina ceramic grade mainly applicable for roughing and finishing cast iron and steel in higher surface speed operations.
CC-20
Our standard Black ceramic grade is a composite with Alumina Matrix containing Titanium Carbide with excellent wear, crater and strength characteristics.
CC-22
Our Dark Grey Ceramic that is great for machining ductile iron.
CC-30
Our Black ceramic grade for cutting high hardness metals with Rc 55 and above, chilled cast iron and powdered metals. This insert has replaced some grinding operations in hardened steel (Rc 60–62). Available with hole for pinlock.
CC-33
Our best Black ceramic suitable for ALL hardness of irons or steel. It is tougher and more wear-resistant.
Silicon Nitride Grades
CC-510
A high-speed, low-cost silicon nitride grade with excellent wear resistance.
CC-513
Our Toughest silicon nitride grade. Great for high-speed iron cutting with very heavy interruptions in milling, turning, boring, facing.
CC-514
Our medium silicon nitride grade. Great for general purpose machining of irons.
CC-515
Our silicon nitride grade for all irons, especially ductile and nodular irons. Extremely hard, wear-resistant silicon nitride for roughing and finishing at elevated speeds. Works in continuous and interrupted cuts.
CC-516
Our Best overall grade with very good wear-resistance & excellent shock resistance. Excellent for hard materials & interrupted cuts at high speeds.
CC-5477
Our silicon nitride grade for cutting Exotic aerospace metals such as Inconel, Waspaloy, Hastelloy, Renee, etc. For roughing and finishing. A cost-effective alternative to the “whiskered” ceramic.

*SC Coating can be applied to all grades above!

Coated Carbide Grades
R-100-SC
Thick CVD (TiCN with Al₂O₃) coating. Ideal for finishing steel, cast steel, and stainless steel at high speeds in dry machining. Excellent wear-resistance. Can also be used in abrasive irons like ductile iron.
R-200-SC
Thick CVD (TiCN with Al₂O₃) coating. This is the grade with the widest application area. Great for finishing, semi-finishing, and light roughing of steel, cast steel, stainless steel, and abrasive irons.
R-300-SC
Thin PVD (AlTiN) coating and ultra-fine carbide substrate. Great for finishing to semi-finishing of stainless steels, heat resistant alloys, hi-temp alloys and titanium alloys. Good for milling of stainless steel.
R-400-SC
Thick CVD (TiCN with Al₂O₃) on top of a very hard substrate to produce the best balance between wear and flanking resistance when machining irons, especially nodular, at high speeds.
R-500-SC
TiAlN coating over an ultra-fine carbide substrate of high strength and toughness. Suitable for milling and boring all kinds of materials, as well as rough turning of high-temperature alloys.
R-600-SC
Uncoated, high-polish carbide grade with fine size grain. Good for fine and semi-finish machining of cast iron and nonferrous metal, particularly Aluminum.
Whisker Ceramic Grade
CC-60
A ceramic whisker material comparable to Greenleaf’s WG-300. Excellent for rough and finish machining of aerospace metals (Inconel, Titanium, Udimet, Hastelloy, etc.), some stainless steels, hardened steels and nodular and chilled irons.
CC-61
A more wear-resistant grade that is not as tough as the CC-60.
CC-62
A much tougher grade than our CC-60 but not as wear-resistant. Good for high-speed steel and high chrome steel in medium to low speeds with heavy interruptions.

*SC Coating can be applied to all grades above!

Where can you run Ceramic and Silicon Nitride?
Silicon Nitride (SiN)

In almost all iron applications, such as cast, ductile, nodular, etc., you can do ROUGHING and FINISHING in turning, boring, facing and milling. The SiN will last longer, run faster, and give you a better finish than coated tungsten carbide. Our SiN generally out-performs any other competitor’s SiN, especially our CC-516 and CC-514 grades.

Our CC-5477 SiN grade works well in ROUGHING and FINISHING of aerospace metals, such as Inconel, Waspaloy, Hastelloy, etc. We have other grades in this series also.

Our CC-516 and CC-515 SiN grades can also ROUGH in hardened steel above Rc58.

Black/White Ceramics (B/WC)

In almost all iron and steel applications, you can use either ceramic to do FINISHING operations. The B/WC can be run at faster speeds, will last longer, and give a better surface finish than coated carbides.

Where B/WC can work for FINISHING in irons, they will generally work better than even the SiN and be less expensive.

In steels, most customers are FINISHING in coated carbides, but B/WC can be run faster, last longer, and give a much better surface finish than the coated carbides. In many applications, the B/WC have REPLACED GRINDING operations.

In steels above Rc58, you can ROUGH with SiN and FINISH with the black ceramic, or the gold-coated black ceramic. In many cases, you can REPLACE GRINDING operations.

In many powdered metal operations, you can use the B/WC for FINISHING.