Betalent carbide corner radius end mills are made of high-quality carbide rods and designed by professional end mill designers with reasonable blade angle, blade shape, number of flutes, and chip groove. And all these type end mills are ground by imported Walter 5 axils grinding machine in order to get high enough precision level. Then a special passivating treatment and proper coating are done to the finished end mills to make the end mill tougher and longer lifetime.
There are four carbide grades applied to general flat end mills:

BT45, for milling materials of which hardness range from HRC45degree to HRC48degree, workpiece categories P, K, and softer stainless steel under M group in ISO classification.
BT50, for HRC50 to HRC53degree, mainly for M, N, and K group workpiece.
BT55, for HRC55 to HRC58degree, for S, M, and K workpiece.
BT60, for HRC 60 to 65degree, for milling quenched materials (HRC65 about), hardwood, and finish milling of SUS 316L stainless steel, most workpiece under ISO category H.

Corner Radius End Mill List
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https://www.betalentcarbide.com/products/corner-radius-end-mill/