RDMT carbide insert
P20-P30: for high cutting speed on carbon steel and alloy steel, high toughness cutting edge.
M20-M40:For stainless steel machining, high hardness milling grade
S20-S40 for low to medium speed milling on heat resistance alloy.
P15-P25:High speed machining of carbon steel and alloy steel, high wear resistance.
M15-M35:For stainless steel machining, high wear resistance, high oxidation resistance temperature.
S15-S35: for high temp alloys machining, high wear resistance.
Note: more good at stainless steel working.