Machining Recommendations - Romay Corporation

P Material		*R-100*			*R-200*			M Material		*R-300 & R-500*
	Brinnell Hardness	.004″IPR	.016″IPR	.032″IPR	.004″IPR	.016″IPR	.032″IPR			.004″IPR	.008″IPR	.012″IPR
	Brinnell Hardness	Surface Feet Per Minute			Surface Feet Per Minute					Surface Feet Per Minute
Carbon Steel	125	1700	1200	900	1600	1100	800	Stainless Steel		900	750	585
	150	1600	1100	850	1450	1000	700	Stainless Steel		900	750	585
	170	1500	1100	800	1300	900	650

Low Alloy Steel	180	1700	1170	800	1500	1000	715	S Material	Brinnell Hardness	*R-300 & R-500*
	210	1500	1000	715	1300	900	620		Brinnell Hardness	.004″IPR	.008″IPR	.012″IPR
	275	950	850	500	900	620	500	Heat Resistant & High Temp Alloy		Surface Feet Per Minute
	350	750	520	400	700	500	400	Iron Based	200	250	200	180
								Iron Based	280	180	160	150
High Alloy Steel	200	1250	850	600	975	700	500	Ni or Co Based	250	150	130	100
	325	600	400	300	450	325	250	Ni or Co Based	350	110	100	80

Cast Steel	180	900	700	525	780	600	400
	200	800	600	450	700	450	325	K Material	Brinnell Hardness	*R-400 & R-100*
	225	650	600	325	650	425	300			.004″IPR	.012″IPR	.024″IPR
								Irons		Surface Feet Per Minute
								Malleable Cast Iron	130	1200	1000	800
								Malleable Cast Iron	230	900	700	500
								Cast Iron	180	1700	1100	800
								Cast Iron	260	800	700	500
								Graphite Cast Iron	160	1100	800	600
								Graphite Cast Iron	250	800	600	450
								Romay Silicon Nitride can be run on all irons at significantly increased speeds

R = Roughing F = Finishing SR = Semi-Roughing SF = Semi-Finishing

Turning and Boring:
Material	Operation	Recommended Grade	Speed(SFM)	Feed(IPR)	DOC (max)
Low-Carbon Steels <Rc56	R, SR	CC-10, CC-20 (thicker inserts)	300 – 2,300	.008 – .020	.060
Low-Carbon Steels <Rc56	F, SF	CC-10, CC-20	600 – 4,000	.003 – .030	.020
Alloy Steels <Rc56	R, SR	CC-10, CC-20 (thicker inserts)	200-2,200	.008-.020	.060
Alloy Steels <Rc56	F, SF	CC-10, CC-20	600-4,000	.003-.030	.020
Hardened Steels; Chilled Cast Iron >Rc56	F, SF	CC-30	200-700	.003-.010	.020
Hardened Steels; Chilled Cast Iron >Rc56	F, SF	CC-30-SC	200-700	.003-.010	.040
Cast Iron	R, SR	CC-5XX	500-5,000	.010-.025	.250
Cast Iron	F, SF	CC-20, CC-5XX	800-5,000	.003-.025	.050
Ductile & Nodular Iron	R, SR	CC-5XX	500-2,000+	.010-.025	.150
Ductile & Nodular Iron	F, SF	CC-20, CC-5XX	500-2,500	.003-.025	.040
Ni-based alloys; Non-ferrous metals	R, SR	CC-5477	500-850	.008-.016	.150
Ni-based alloys; Non-ferrous metals	F, SF	CC-5477, CC-20	500-1,500	.004-.008	.040


Milling:
Material	Operation	Recommended Grade	Speed(SFM)	Feed(IPR)
Cast Iron	R, SR	CC-5XX	300-4,000	.004-.008
Cast Iron	F, SF	CC-20, CC-5XX	500-5,000	.002-.004
Ductile & Nodular Iron	R, SR	CC-5XX	300-2,500	.002-.006
Ductile & Nodular Iron	F, SF	CC-5XX	650-5,000	.002-.004

In irons: 40% faster than the coated carbide on the first corner. Keep increasing the speed by 25% per corner after that.

In steels: 25% faster than the coated carbide on the first corner. Keep increasing the speed by 20% per corner after that.