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SAE designation	UNS designation	% Cr	% Ni	% C	% Mn	% Si	% P	% S	% N	Other
Austenitic
201	S20100	16–18	3.5–5.5	0.15	5.5–7.5	0.75	0.06	0.03	0.25	-
202	S20200	17–19	4–6	0.15	7.5–10.0	0.75	0.06	0.03	0.25	-
205	S20500	16.5–18	1–1.75	0.12–0.25	14–15.5	0.75	0.06	0.03	0.32–0.40	-
254^[10]	S31254	20	18	0.02 max	-	-	-	-	0.20	6 Mo; 0.75 Cu; "Super austenitic"; All values nominal
301	S30100	16–18	6–8	0.15	2	0.75	0.045	0.03	-	-
302	S30200	17–19	8–10	0.15	2	0.75	0.045	0.03	0.1	-
302B	S30215	17–19	8–10	0.15	2	2.0–3.0	0.045	0.03	-	-
303	S30300	17–19	8–10	0.15	2	1	0.2	0.15 min	-	Mo 0.60 (optional)
303Se	S30323	17–19	8–10	0.15	2	1	0.2	0.06	-	0.15 Se min
304	S30400	18–20	8–10.50	0.08	2	0.75	0.045	0.03	0.1	-
304L	S30403	18–20	8–12	0.03	2	0.75	0.045	0.03	0.1	-
304Cu	S30430	17–19	8–10	0.08	2	0.75	0.045	0.03	-	3–4 Cu
304N	S30451	18–20	8–10.50	0.08	2	0.75	0.045	0.03	0.10–0.16	-
305	S30500	17–19	10.50–13	0.12	2	0.75	0.045	0.03	-	-
308	S30800	19–21	10–12	0.08	2	1	0.045	0.03	-	-
309	S30900	22–24	12–15	0.2	2	1	0.045	0.03	-	-
309S	S30908	22–24	12–15	0.08	2	1	0.045	0.03	-	-
310	S31000	24–26	19–22	0.25	2	1.5	0.045	0.03	-	-
310S	S31008	24–26	19–22	0.08	2	1.5	0.045	0.03	-	-
314	S31400	23–26	19–22	0.25	2	1.5–3.0	0.045	0.03	-	-
316	S31600	16–18	10–14	0.08	2	0.75	0.045	0.03	0.10	2.0–3.0 Mo
316L	S31603	16–18	10–14	0.03	2	0.75	0.045	0.03	0.10	2.0–3.0 Mo
316F	S31620	16–18	10–14	0.08	2	1	0.2	0.10 min	-	1.75–2.50 Mo
316N	S31651	16–18	10–14	0.08	2	0.75	0.045	0.03	0.10–0.16	2.0–3.0 Mo
317	S31700	18–20	11–15	0.08	2	0.75	0.045	0.03	0.10 max	3.0–4.0 Mo
317L	S31703	18–20	11–15	0.03	2	0.75	0.045	0.03	0.10 max	3.0–4.0 Mo
321	S32100	17–19	9–12	0.08	2	0.75	0.045	0.03	0.10 max	Ti 5(C+N) min, 0.70 max
329	S32900	23–28	2.5–5	0.08	2	0.75	0.04	0.03	-	1–2 Mo
330	N08330	17–20	34–37	0.08	2	0.75–1.50	0.04	0.03	-	-
347	S34700	17–19	9–13	0.08	2	0.75	0.045	0.030	-	Nb + Ta, 10 x C min, 1 max
348	S34800	17–19	9–13	0.08	2	0.75	0.045	0.030	-	Nb + Ta, 10 x C min, 1 max, but 0.10 Ta max; 0.20 Ca
384	S38400	15–17	17–19	0.08	2	1	0.045	0.03	-	-
SAE designation	UNS designation	% Cr	% Ni	% C	% Mn	% Si	% P	% S	% N	Other
Ferritic
405	S40500	11.5–14.5	-	0.08	1	1	0.04	0.03	-	0.1–0.3 Al, 0.60 max
409	S40900	10.5–11.75	0.05	0.08	1	1	0.045	0.03	-	Ti 6 x (C + N) ^[11]
429	S42900	14–16	0.75	0.12	1	1	0.04	0.03	-	-
430	S43000	16–18	0.75	0.12	1	1	0.04	0.03	-	-
430F	S43020	16–18	-	0.12	1.25	1	0.06	0.15 min	-	0.60 Mo (optional)
430FSe	S43023	16–18	-	0.12	1.25	1	0.06	0.06	-	0.15 Se min
434	S43400	16–18	-	0.12	1	1	0.04	0.03	-	0.75–1.25 Mo
436	S43600	16–18	-	0.12	1	1	0.04	0.03	-	0.75–1.25 Mo; Nb+Ta 5 x C min, 0.70 max
442	S44200	18–23	-	0.2	1	1	0.04	0.03	-	-
446	S44600	23–27	0.25	0.2	1.5	1	0.04	0.03	-	-
SAE designation	UNS designation	% Cr	% Ni	% C	% Mn	% Si	% P	% S	% N	Other
Martensitic
403	S40300	11.5–13.0	0.60	0.15	1	0.5	0.04	0.03	-	-
410	S41000	11.5–13.5	0.75	0.15	1	1	0.04	0.03	-	-
414	S41400	11.5–13.5	1.25–2.50	0.15	1	1	0.04	0.03	-	-
416	S41600	12–14	-	0.15	1.25	1	0.06	0.15 min	-	0.060 Mo (optional)
416Se	S41623	12–14	-	0.15	1.25	1	0.06	0.06	-	0.15 Se min
420	S42000	12–14	-	0.15 min	1	1	0.04	0.03	-	-
420F	S42020	12–14	-	0.15 min	1.25	1	0.06	0.15 min	-	0.60 Mo max (optional)
422	S42200	11.0–12.5	0.50–1.0	0.20–0.25	0.5–1.0	0.5	0.025	0.025	-	0.90–1.25 Mo; 0.20–0.30 V; 0.90–1.25 W
431	S41623	15–17	1.25–2.50	0.2	1	1	0.04	0.03	-	-
440A	S44002	16–18	-	0.60–0.75	1	1	0.04	0.03	-	0.75 Mo
440B	S44003	16–18	-	0.75–0.95	1	1	0.04	0.03	-	0.75 Mo
440C	S44004	16–18	-	0.95–1.20	1	1	0.04	0.03	-	0.75 Mo
SAE designation	UNS designation	% Cr	% Ni	% C	% Mn	% Si	% P	% S	% N	Other
Heat resisting
501	S50100	4–6	-	0.10 min	1	1	0.04	0.03	-	0.40–0.65 Mo
502	S50200	4–6	-	0.1	1	1	0.04	0.03	-	0.40–0.65 Mo
Martensitic precipitation hardening
630	S17400	15-17	3-5	0.07	1	1	0.04	0.03	-	Cu 3-5, Ta 0.15-0.45 ^[12]

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