Surface Roughness Achievements at TDC

TDC’s Surface Roughness and Ra Achievements

We are pleased to present the surface roughness achievements for various materials that have undergone mirror finishing at TDC.

The achievements presented on this page are just examples.
Please note that the surface roughness values are based on actual processing results. For champion data or the most recent data, feel free to contact us. We are actively processing materials not listed here, including new materials.
If you have a material you would like to process or specific surface roughness/finish requirements, please don’t hesitate to consult with TDC!

＊The surface roughness data is based on JIS B0601 standards.

For each material, please follow the links below:

・Metal
・Resin
・Ceramics
・Glass
・Semiconductor
・Coating
・Others

Metal

材質	Ra (nm)	Rz (nm)	Sa(nm)	Sz(nm)
FC250	2.179	11.58	–	–
Fe	0.529	3.357	–	–
Fe-Ni36	0.881	4.82	–	–
SPCC	1.01	5.457	–	–
DC53	0.794	7.267	–	–
S35C	2.503	13.42	–	–
S45C	0.608	3.727	–	–
S50C	0.518	3.543	–	–
SK-3	0.586	3.76	–	–
SK-4	0.769	4.74	–	–
SKD11	0.641	4.5	–	–
SKD61	0.608	3.017	–	–
SUS301	0.419	2.467	–	–
SUS303	0.342	2.109	–	–
SUS304	0.308	1.95	1.84	38
SUS310	0.494	3.513	–	–
SUS316	0.37	2.3	0.5	3.1
SUS316L	0.534	3.653	–	–
SUS321	0.498	2.653	–	–
SUS329J4L	4.707	23.963	–	–
SUS403	1.554	8.703	–	–
SUS410	0.673	4.677	–	–
SUS420J2	0.363	2.427	–	–
SUS430	0.221	1.393	–	–
SUS440C	0.381	2.76	–	–
SUS444	0.64	3.96	–	–
SUS447J1	1.067	7.483	–	–
SUS630	0.451	3.007	–	–
SUS836	0.503	3.547	–	–
S-STAR	0.402	2.2	–	–
S-STAR(HRC52)	0.537	3.74	–	–
S-STAR(HRC33)	0.646	3.777	–	–
D-STAR	0.664	3.93	–	–
NAK55	0.651	4.677	–	–
NAK80	0.33	3.212	–	–
HPM31	0.623	3.263	–	–
HPM31(HRC58~62)	0.593	4.097	–	–
HPM38	0.311	1.993	–	–
HPM38(HRC52~54)	0.403	2.39	–	–
HPM38(HRC50)	0.591	4.117	–	–
HPM38(HRC52)	0.35	2.07	–	–
CENA1	0.442	3.19	–	–
CENA-V	0.551	3.163	–	–
MAT21	0.546	2.817	–	–
HAP10	1.364	7.987	–	–
HAP10(HRC62~64)	1.421	9.663	–	–
HAP40(HRC64~66)	1.39	8.14	–	–
M333	0.471	3.18	–	–
STAVAX	0.33	2.13	–	–
ELMAX	0.9	5.83	–	–
POLMAX	0.528	4.073	–	–
Pure Cu	0.219	1.213	0.674	5
C1011	0.48	2.76	–	–
C1020	0.303	1.61	–	–
C2801	6.825	34.043	–	–
C3604BD	3.066	24.623	–	–
Phosphor bronz	0.712	3.57	–	–
BeCu	0.88	5.05	–	–
Pure Al	0.23	1.6	0.8	4.8
A1050	0.815	5.043	–	–
A1070	0.957	5.217	–	–
A1100	0.87	4.85	–	–
A2219	0.962	6.343	–	–
A5052	0.404	2.24	0.841	4.2
A5056	1.265	6.55	–	–
A6061	0.627	4.287	–	–
A7075	1.056	6.287	–	–
Ni (Polycrystal)	0.376	2.43	3.5	35
Ni (Singlecrystal)	0.864	5.75	–	–
NiTi	0.628	3.377	–	–
Ni718	0.566	3.72	–	–
Ni720	1.502	9.383	–	–
NiCo	0.488	3.527	–	–
NiFe	12	169	–	–
Pure Ti	0.38	2.5	–	–
64Ti	0.328	1.81	–	–
βTi	0.349	2.18	–	–
TB340C	0.868	6.973	–	–
PK	1.57	9.36	–	–
SUJ2	0.527	3.45	–	–
SKS3	0.943	5.58	–	–
SCM415	0.604	3.567	–	–
SCM420	0.61	3.87	–	–
SCM420H	0.898	5.247	–	–
SCM435	2.324	14.103	–	–
SCM440	1.152	5.977	–	–
SCr15	3.337	19.13	–	–
SCr20	0.723	4.963	–	–
SCr420	1.845	10.883	–	–
SNCM20	1.152	6.147	–	–
SNCM439	0.596	3.977	–	–
SACM645	0.628	3.977	–	–
SNMN432	0.608	3.857	–	–
YSM	0.663	4.192	–	–
SKH51	0.47	3.4	–	–
SKH55	3.08	23.35	–	–
SKH57	3	18	–	–
Palladium	0.739	5.043	–	–
Vanadium	1.1	6.5	–	–
Niobium	0.495	3.33	–	–
Rhodium	0.545	3.577	–	–
Inconel®	0.417	2.623	–	–
HASTELLOY	0.421	2.597	3	34.6
42 Alloy	0.514	3.65	–	–
Ag	0.864	5.49	–	–
Au	1.582	10.347	–	–
Pt	0.586	4.237	–	–
Co	0.807	5.3	–	–
CoCr	47	470	–	–
CoNiCrMo	1.803	9.063	–	–
COBARION	0.423	2.493	–	–
Kovar	0.43	3.053	–	–
Stellite®	4.564	24.71	–	–
Ge	0.66	4.48	–	–
Mg Alloy	3.63	24.1	–	–
Sn	1.305	8.9	–	–
Zn	0.91	5.827	–	–
Metalic Glass	0.28	1.837	–	–
MA22	0.473	2.81	–	–
Cr	0.31	2.1	–	–
Te	3.976	23.253	–	–
80W-20Cu	8.3	47.2	–	–
Ta	0.25	1.87	–	–
Mo	0.467	3.72	–	–
W	0.455	2.833	–	–
W-Mo Alloy	1.641	10.843	–	–
W0.5%Mo	1.413	9.717	–	–
W1.9%Mo	1.625	11.077	–	–
W25%Mo	1.082	6.717	–	–
W50%Mo	2.177	12.047	–	–
W56%Mo	1.788	11.007	–	–
Invar	0.711	3.74	0.8	10.5
Super Invar	0.405	2.367	–	–
Hf	0.751	4.48	–	–
Cemented Carbide	0.375	2.308	–	–
SPRON	0.26	1.101	–	–
ELGILOY	0.644	–	–	–
NdFeB	2.889	63.127	–	–
PD613	0.47	3.44	–	–
BiSbTe	4.162	72.26	–	–
VANADIS60	1.315	8.373	–	–
VANADIS23(HRC63~65)	1.655	12.073	–	–
Nimowal	0.85	4.83	–	–
LEX-ZERO	0.746	4.307	–	–
Cu-T Alloy	3.2	18	–	–
TW340	0.497	3.44	–	–
Stenless Invar	0.642	4.04	–	–
ASP23	1.588	8.31	–	–
ASP23(HRC63~65)	1.422	10.747	–	–
ASP30(HRC65~66)	1.31	8.893	–	–
YH75	5.96	31.197	–	–
W-5Re Arroy	1.155	6.047	–	–
W-10Re Arroy	3.242	14.103	–	–
KN40	1.594	13.85	–	–
ATM100	1.699	10.61	–	–
AMS4928	26	161	–	–
Pd	0.854	5.037	–	–
Brass	3.579	14.407	–	–
C-22	0.491	3.973	–	–
K-M38	0.68	4.37	–	–
AF-1	0.979	7.51	–	–
904L	1.653	9.08	–	–
SKH57(HRC66-69)	1.953	12.507	–	–
HAC1	2.119	15.533	–	–
A1N30	1.741	11.13	–	–
W-0.1Cr Arroy	1.254	9.357	–	–

Resin

Materila	Ra (nm)	Rz (nm)
Acrylic	0.99	7.04
ABS	4.972	29.637
COP	2.317	19.9
PTFE	1.918	12.663
PES4100G	1.698	11.247
PC	3.7	28.72
PEEK	1.002	6.809
PEEK450G	1.785	10.807
Vespel	1.96	14.1
Polyimide	1.42	11.9
polyester	3.693	33.963
PPS	1.41	9.96
PDMS	1.191	9.177
PP	1.615	10.13
ORGA	1.937	12.487
SUMI-EPOXY	5.256	82.863
Iupilon®	3.852	57.597
Polymer Monolith	54	500
Glass Epoxy	1.736	17.81
Epoxy	2.137	12.59
POM	48.0	489.0
ULTEM	1.884	9.007
Carbon included PTFE	64	500
AZP resin	2.14	23.8
PVDF	43.38	334.46
Meldin 7001	55	467
PMMA	30.15	372.84
COC	5.69	33.407

Ceramics

Material	Ra (nm)	Rz (nm)	Sa(nm)	Sz(nm)
GDC	1.176	7.823	–	–
Alsima L	1.922	28.927	–	–
NEXCERA	2.722	81.173	–	–
SiC	0.401	2.1	1.5	11.287
CVD-SiC	0.488	3.25	–	–
Si3N4	0.507	4.32	0.8	5.7
Barium Titanate	0.549	1.816	–	–
AIN	0.733	5.073	–	–
ZrO2	0.474	2.773	–	–
Transparent Alumina	0.8	6.5	–	–
Carbon	4.5	26.4	–	–
G540S	10.26	75.74	–	–
92％ Al2O3	3.797	25.6	–	–
99.5％ Al2O3	1.017	7.987	–	–
99.6％ Al2O3	1.053	7.37	–	–
99.7％ Al2O3	2.6	–	–	–
Al2O3/ZrO2	7	39	–	–
Sintered Alumina	0.848	5.633	–	–
Ferrite	0.874	6.627	–	–
Sialon	7.908	208.59	–	–
Glassy Carbon	0.669	4.557	–	–
CEPLA	2.325	17.967	–	–
Ruby	0.724	5.107	–	–
Black Al2O3-ZrO2	7.637	117.343	–	–
Shapal®	158.0	1159.0	–	–
TiO2	0.884	10.42	–	–
SS501	1.984	10.297	–	–
Cordierite	1.018	7.217	–	–
Apatite	1.289	29.673	–	–
LLZT	0.485	3.33	–	–
Mg2SiSn	–	–	0.8	4.4
Si impregnated SiC	2.567	17.71	–	–
SiN	0.649	4.527	–	–
BZYb	2.679	24.647	–	–
BZCY	2.931	25.943	–	–
SiSiC	35.3	480.42	–	–
machinable ceramics SP	4.527	44.003	–	–
99.8％ Al2O3	13.714	208.83	–	–

Glass

Material	Ra (nm)	Rz (nm)	Sa(nm)	Sz(nm)
Fused quartz	0.295	2.047	0.63	4.4
BK7	0.725	5.647	–	–
TEMPAX Float®	0.426	3.067	–	–
Soda-Lime Glass	0.73	5.4	–	–
CLEARCERAM™-Z	0.609	3.757	–	–
Zerodur	0.541	4.217	–	–
borosilicate glass	0.707	7.181	–	–
Pyrex	0.487	3.267	–	–
crown glass	0.46	3.14	–	–
Quartz glass	0.48	3.967	–	–

Crystal (Semiconductor/Optics)

Material	Ra (nm)	Rz (nm)	Sa(nm)	Sz(nm)
AISi	0.775	6.17	–	–
Si	0.129	0.723	–	–
Quartz	0.6	4.41	–	–
GAGG	0.526	3.653	–	–
Sapphire	0.4	2.9	1.3	9.8
LiNb03	0.366	2.313	–	–
YIG	0.442	3.007	–	–
LiTa	0.232	1.18	–	–
YAG	0.442	3.007	–	–
Y3Al5O12	1.689	9.073	–	–
GAN	0.573	4.15	–	–
SiC (Singlecrystal)	0.07		–	–
PG	16	240	–	–
SiGe	0.829	4.477	–	–
CVD-SiC	0.38	3.6	–	–
Bi2Te3	4.335	29.93	–	–
Spinel	0.87	3.6	–	–
CTGS (Singlecrystal)	0.301	2.137	–	–
Ge	0.295	2	–	–
Diamond	0.331	1.897	–	–
Mg2SiSh	1.82	10	–	–

Coating

Material	Ra (nm)	Rz (nm)
Cr Plating	0.29	1.75
Ni-P	0.263	1.93
PFA	2.152	14.597
Cu	0.299	1.86
Alumite	1.154	12.947
Al	127.0	1218.0
PTFE	26.0	364.0
Al2O3 Thermal Spraying	0.638	75.453
TiC	1.01	4.91
FEP	6.311	60.66
PBI	6.46	70.93
YSZ Thermal Spraying	1.243	10.667

Others

Material	Ra (nm)	Rz (nm)
Stone Plate Thermal Spraying	267.0	2060.0
Pebble	171.0	1336.0
Lapis Lazuli	13.814	307.02
PCD	5.65	159.7
Arkansas stone	10.853	217.933