Technical Details - PARTH STEEL & ENGG. CO.

Chemical composition of stainless steel

Classification	Specification		Chemical Composition										other
Classification	JIS	AISI	C	Si	Mn	P	S	Ni	Cr	Mo	Cu	N	other
Martensitic Grades	SUS410	410	Max.0.15	Max.1.00	Max.1.00	Max.0.040	Max.0.030	(1)	11.50~13.50	-	-	-	-
	SUS416	416	Max.0.15	Max.1.00	Max.1.25	Max.0.060	Min.0.15	(1)	12.00~14.00	(2)	-	-	-
	SUS420J1	420	0.16~0.25	Max.1.00	Max.1.00	Max.0.040	Max.0.030	(1)	12.00~14.00	-	-	-	-
	SUS430	430	Max.0.12	Max.0.75	Max.1.00	Max.0.040	Max.0.030	-	16.00~18.00	-	-	-	-
	SUS430F	430F	Max.0.12	Max.1.00	Max.1.25	Max.0.060	Min.0.15	-	16.00~18.00	(2)	-	-	-
	SUS431	431	Max.0.20	Max.1.00	Max.1.00	Max.0.040	Max.0.030	1.25~2.50	15.00~17.00	-	-	-	-
	SUS440A	440A	0.60~0.75	Max.1.00	Max.1.00	Max.0.040	Max.0.030	(1)	16.00~18.00	(3)	-	-	-
	SUS440B	440B	0.75~0.95	Max.1.00	Max.1.00	Max.0.040	Max.0.030	(1)	16.00~18.00	(3)	-	-	-
	SUS440C	440C	0.95~1.20	Max.1.00	Max.1.00	Max.0.040	Max.0.030	(1)	16.00~18.00	(3)	-	-	-
Austenitic Grades	SUS201	201	Max.0.15	Max.1.00	5.50~7.50	Max.0.060	Max.0.030	3.50~5.50	16.00~18.00	-	-	0.25??	-
	SUS202	202	Max.0.15	Max.1.00	7.50~10.00	Max.0.060	Max.0.030	4.00~6.00	17.00~19.00	-	-	Max.0.25	-
	SUS301	301	Max.0.15	Max.1.00	Max.2.00	Max.0.045	Max.0.030	6.00~8.00	16.00~18.00	-	-	-	-
	SUS303	303	Max.0.15	Max.1.00	Max.2.00	Max.0.200	Min.0.15	8.00~10.00	17.00~19.00	(2)	-	-	-
	SUS304	304	Max.0.08	Max.1.00	Max.2.00	Max.0.045	Max.0.030	8.00~10.50	18.00~20.00	-	-	-	-
	SUS304L	304L	Max.0.03	Max.1.00	Max.2.00	Max.0.045	Max.0.030	9.00~13.00	18.00~20.00	-	-	-	-
	SUS316	316	Max.0.08	Max.1.00	Max.2.00	Max.0.045	Max.0.030	10.00~14.00	16.00~18.00	2.00~3.00	-	-	-
	SUS316L	316L	Max.0.03	Max.1.00	Max.2.00	Max.0.045	Max.0.030	12.00~15.00	16.00~18.00	2.00~3.00	-	-	-
	SUS316Ti	-	Max.0.08	Max.1.00	Max.2.00	Max.0.045	Max.0.030	10.00~14.00	16.00~18.00	2.00~3.00	-	-	Ti Min.5xC%
	SUS321	321	Max.0.08	Max.1.00	Max.2.00	Max.0.045	Max.0.030	9.00~13.00	17.00~19.00	-	-	-	Ti Min.5xC%
	SUS347	347	Max.0.08	Max.1.00	Max.2.00	Max.0.045	Max.0.030	9.00~13.00	17.00~19.00	-	-	-	Nb Min.10xC%
Precipitation Hardening Grades	SUS630	S17400	Max.0.07	Max.1.00	Max.1.00	Max.0.040	Max.0.030	3.00~5.00	15.00~17.50	-	3.00~5.00	-	Nb 0.15~0.45

Reference Table: Steel hardness conversion chart - all values approximate

Brinell Hardness HB	Rockwell HRC	Rockwell HRB	Vickers HV	N/mm²
800	72	-	-	-
780	71	-	-	-
760	70	-	-	-
752	69	-	-	-
745	68	-	-	-
746	67	-	-	-
735	66	-	-	-
711	65	-	-	-
695	64	-	-	-
681	63	-	-	-
658	62	-	-	-
642	61	-	-	-
627	60	-	-	-
613	59	-	-	-
601	58	-	746	-
592	57	-	727	-
572	56	-	694	-
552	55	-	649	-
534	54	120	589	-
513	53	119	567	-
504	52	118	549	-
486	51	118	531	-
469	50	117	505	-
468	49	117	497	-
456	48	116	490	1569
445	47	115	474	1520
430	46	115	458	1471
419	45	114	448	1447
415	44	114	438	1422
402	43	114	424	1390
388	42	113	406	1363
375	41	112	393	1314
373	40	111	388	1265
360	39	111	376	1236
348	38	110	361	1187
341	37	109	351	1157
331	36	109	342	1118
322	35	108	332	1089
314	34	108	320	1049
308	33	107	311	1035
300	32	107	303	1020
290	31	106	292	990
277	30	105	285	971
271	29	104	277	941
264	28	103	271	892
262	27	103	262	880
255	26	102	258	870
250	25	101	255	853
245	24	100	252	838
240	23	100	247	824
308	33	107	311	1035
300	32	107	303	1020
290	31	106	292	990
277	30	105	285	971
271	29	104	277	941
264	28	103	271	892
262	27	103	262	880
255	26	102	258	870
250	25	101	255	853
245	24	100	252	838
240	23	100	247	824
233	22	99	241	794
229	21	98	235	775
223	20	97	227	755
216	19	96	222	716
212	18	95	218	706
208	17	95	210	696
203	16	94	201	680
199	15	93	199	667
191	14	92	197	657
190	13	92	186	648
186	12	91	184	637
183	11	90	183	617
180	10	89	180	608
175	9	88	178	685
170	7	87	175	559
167	6	86	172	555
166	5	86	168	549
163	4	85	162	539
160	3	84	160	535
156	2	83	158	530
154	1	82	152	515
149		81	149	500
147		80	147	490
143		79	146	482
141		78	144	481
139		77	142	480
137		76	140	475
135		75	137	467
131		74	134	461
127		72	129	451
121		70	127	431
116		68	124	422
114		67	121	412
111		66	118	402
107		64	115	382
105		62	112	378
103		61	108	373
95		56	104
90		52	95
81		41	85
76		37	80
Brinell HB	Rockwell HRC	Rockwell HRB	Vickers HV	HVN/mm²
3000kg 10mm Ball	150kg Brale	100kg 100kg	Diamond Pyramid 120kg	Tensile strength (Approx)

Tolerances on cross sections

Drawn round, hexagon and square bars

Drawn round bars are covered by class h10, except for any supplied in the quenched and tempered condition, (i.e. martensitic stainless grades), which are covered by class h11 Hexagon and square bars are covered by class h11 in sections sizes up to 80mm and class h12 in section sizes over 80mm. Ground finished products are covered by class h9.

Nominal dimension	Tolerance class to ISO 286-2
Nominal dimension	h6	h7	h8	h9	h10	h11	h12
over 1 up to 3	0.006	0.01	0.014	0.025	0.04	0.06	0.1
over 3 up to 6	0.008	0.012	0.018	0.03	0.048	0.075	0.12
over 6 up to 10	0.009	0.015	0.022	0.036	0.058	0.09	0.15
over 10 up to 18	0.011	0.018	0.027	0.043	0.07	0.11	0.18
over 18 up to 30	0.013	0.021	0.033	0.052	0.084	0.13	0.21
over 30 up to 50	0.016	0.025	0.039	0.062	0.1	0.16	0.25
over 50 up to 80	0.019	0.03	0.046	0.074	0.12	0.19	0.3
over 80 up to 120	0.022	0.035	0.054	0.087	0.14	0.22	0.35
over 120 up to 180	0.025	0.04	0.063	0.1	0.16	0.25	0.4
over 180 up to 200	0.029	0.046	0.072	0.115	0.185	0.29	0.46

Out of round (ovality)

The standard states that the maximum deviation from “out of round” shall not be more than half the specified tolerance, but never above the upper limit of the tolerance.

Flat bars

Drawn flat bars tolerances are covered are shown in the tables below.

Width	Deviation		ISO 286-2 class
Up to 18	0	-0.11	h11
over 18 up to 30	0	-0.13	h11
over 30 up to 50	0	-0.16	h11
over 50 up to 80	0	-0.19	h11
over 80 up to 100	0	-0.22	h11
over 100 up to 150	0.5	-0.5	–
over 150 up to 200	1	-1	–
over 200 up to 300	2	-2	–
over 300 up to 400	2.5	-2.5	–

Thickness	Deviation	ISO 286-2 class
over 3 up to 6	-0.075	h11
over 6 up to 10	-0.090	h11
over 10 up to 18	-0.11	h11
over 18 up to 30	-0.13	h11
over 30 up to 50	-0.16	h11
over 50 up to 60	-0.19	h11
over 60 up to 80	-0.30	h12
over 80 up to 100	-0.35	h12

Note:

All deviations on thickness are +0. These deviations only apply to steels with carbon contents up to 0.20%. Over this limit the deviation is increased by 50%.

Tolerances on straightness

The standard covers covers both stainless and non-stainless steel families. Only the tolerances relating to stainless steels are shown in the following table.

Product form	Nominal dimension	Deviation
Rounds	-	1.0
Squares and hexagons	up to 75	1.0
Squares and hexagons	over 75	1.5
Flats	width below 120	1.5 on width / 2.0 on thickness
	width at or over 120 and w/t below 10:1	2.0 on width / 2.5 on thickness
	width at and over 120 and w/t at or over 10:1	2.5 on width / 3.0 on thickness