431, ASTM A276, ASME SA276, AMS 5628, S43100 Stainless Steel Bar/Rod

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431 belongs to martensitic stainless steel, with execution standards of ASTM A276/A276M-17, ASME SA276, UNS S43100, AMS 5628, and JIS SUS431. The delivery forms include various forms such as plates, bars, pipes, wires, profiles, etc. The specifications are complete and can be customized according to customer needs.

431 series is a type of steel with a good combination of strength and toughness in martensitic stainless steel. It has good corrosion resistance to aqueous solutions of oxidizing acids, most organic acids, and organic salts.

Among the industries that are the major focus of the application analysis of 431 stainless steel are petrochemicals, aircraft, and mechanical manufacturing. Numerous high-strength mechanical parts, including shafts, gears, and bearings, can be made using it.

431 stainless steel is used in the aerospace industry to make turbine blades, high-speed aircraft engine components, etc.

In the petrochemical industry, 431 stainless steel is used for making equipment and pipelines that resist corrosion.

It should be mentioned that 431 stainless steel is challenging to produce due to its high hardness. To increase machining precision and efficiency, care should be taken when cutting, including regulating cutting depth and speed as well as choosing the right tool materials and forms.

To avoid material deformation and fracture formation during cold processing, care should be taken to regulate the processing temperature and maintain uniform processing deformation.

17-7 PH, SUS631, ASTM A693, AMS 5528 Stainless Steel Bar

Grade 431 is available in Bar (Round), Strip, Wire, Rod, and Billet.

431 Stainless Steel Bar Standard Specifications

ASME SA276, A478, SA314, SA484, SA580
ASTM A276, A478, A314, A484, A580
UNS S43100
AMS 5628
MIL-S-18732
Federal QQ-S-763
McDonnell Douglas DMS-1565
BS 7S80, 970, 431S29
Hi Shear #115
EN 57

Equivalent grades

SAE	ASTM	JIS	NF	DIN	UNS	BS	AISI	GOST	EN	GB
51431	A276	SUS 431	Z15CN16-02	X22Ni17(1.4057)	S43100	431S29	431	14X17H	57	1Cr17Ni2

Chemical composition

Weight%	C	P	Si	Ni	Mn	S	Cr	Fe	Mo	Cu	N
Alloy 431	0.12-0.17	0.040 max	0.20-0.60	2-3	0.3	0.030	15.50-16.50	Bal	0.25	0.50	0.10

Mechanical Properties

Material	Condition	Tensile Strength (MPa)	Proof Stress 0.2% (MPa)	Elongation 2"%	Reduction of Area	Brinell Hardness
Alloy 431	Alloy 431 Annealed	862	655	20	55	260
Alloy 431	Alloy 431 Heat Treated AMS 5628	1379	1034	10	40	-

Welding

Grade 431 stainless steel is difficult to weld because of the possibility of cracking. Before welding, the materials should be preheated to 200 to 300°C, and a post-weld heat treatment at 650°C is advised. Grade 410 filler rods can be used for welding, however, grades 308L, 309, or 310 steel can produce ductile welds.

Machining

When annealed, grade 431 steels are easily machineable. However, if these steels are hardened above 30 HRC, machining becomes quite challenging.

Stainless Steel Grade List In Different Countries

No	China	Japan	America		Korea	EU	India	Australia	Taiwan
No	GB	JIS	ASTM	UNS	KS	BS EN	IS	AS	CNS
1	12Cr17Mn6Ni5N	SUS201	201	S20100	STS201	1.4372	10Cr17Mn6Ni4N20	201-2	201
2	12Cr18Mn9Ni5N	SUS202	202	S20200	STS202	1.4373		–	202
3	12Cr17Ni7	SUS301	301	S30100	STS301	1.4319	10Cr17Ni7	301	301
4		SUS302	302	S30200	STS302	1.43	–	–	302
5		SUS303	303	S30300	STS303	1.4305	–	–	–
6	06Cr19Ni10	SUS304	304	S30400	STS304	1.4301	07Cr18Ni9	304	304
7		SUS304S	304S	S31008		1.4845		304S	304S
8	022Cr19Ni10	SUS304L	304L	S30403	STS304L	1.4306	02Cr18Ni11	304L	304L
9	06Cr19Ni10N	SUS304N1	304N	S30451	STS304N1	1.4315	–	304N1	304N1
10	06Cr19Ni9NbN	SUS304N2	XM21	S30452	STS304N2	–	–	304N2	304N2
11	022Cr19Ni10N	SUS304LN	304LN	S30453	STS304LN	–	–	304LN	304LN
12	10Cr18Ni12	SUS305	305	S30500	STS305	1.4303	–	305	305
13		SUS308	308	S30800			–
14	06Cr23Ni13	SUS309S	309S	S30908	STS309S	1.4833	–	309S	309S
15		SUS309	309	S30900	STS309	1.4828	–	–	–
16		SUS310	310	S31000		1.4841	–	–
17	06Cr25Ni20	SUS310S	310S	S31008	STS310S	1.4845	–	310S	310S
18	06Cr17Ni12Mo2	SUS316	316	S31600	STS316	1.4401	04Cr17Ni12Mo2	316	316
19	06Cr17Ni12Mo2Ti	SUS316Ti	316Ti	S31635	–	1.4571	04Cr17Ni12MoTi20	316Ti	316Ti
20	022Cr17Ni12Mo2	SUS316L	316L	S31603	STS316L	1.4404	~02Cr17Ni12Mo2	316L	316L
21	06Cr17Ni12Mo2N	SUS316N	316N	S31651	STS316N	–	–	316N	316N
22	022Cr17Ni13Mo2N	SUS316LN	316LN	S31653	STS316LN	1.4429	–	316LN	316LN
23	06Cr18Ni12Mo2Cu2	SUS316J1	–	–	STS316J1	–	–	316J1	316J1
24	022Cr18Ni14Mo2Cu2	SUS316J1L	–	–	STS316J1L	–	–	–	316J1L
25	06Cr19Ni13Mo3	SUS317	317	S31700	STS317	–	–	317	317
26	022Cr19Ni13Mo3	SUS317L	317L	S31703	STS317L	1.4438	–	317L	317L
27		SUS321H	321H
28	06Cr18Ni11Ti	SUS321	321	S32100	STS321	1.4541	04Cr18Ni10Ti20	321	321
29		SUS303Se	303Se	S30323	STS303Se	–	–	–	–
30	06Cr18Ni11Nb	SUS347	347	S34700	STS347	1.455	04Cr18Ni10Nb40	347	347
31	–	DP11	SAF2304	S32304	–	1.4362	–	–	–
32	–	DP1	–	S31500	–	1.4417	–	–	–
33	–	DP8	SAF2205	S31803	–	1.4462	–	–	–
34	–	329J2l		S631260	–	1.4501	–	–	–
35	–	UR47N+	SAP2507	S32750	–	1.441	–	–	–
36	–	UR52N+	SAP2507	S32550	–	1.4507	–	–	–
37	–	SUS329J1	329	S32900	STS329J1	1.4477	–	329J1	329J1
38	022Cr19Ni5Mo3Si2N	SUS329J3L	–	S31803	STS329J3L	1.4462	–	329J3L	329J3L
39	06Crl3Al	SUS405	405	S40500	STS405	1.4002	04Cr13	405	405
40	022Cr11Ti	SUH409	409	S40900	STS409	1.4512	–	409L	409L
41	–	SUS410L	410L	–	STS410L	–	–	–	–
42	–	SUS447J1	447J1	–	–	–	–	–	–
43	–		XM27	–	–	–	–	–	–
44	–	SUS410S	410S	–	–	–	–	–	–
45	–		429	–	–	–	–	–	–
46	022Cr12	SUS410L	–	–	STS410L	–	–	410L	410L
47	10Cr17	SUS430	430	S43000	STS430	1.4016	05Cr17	430	430
48		SUS430F	430F	S43020	STS430F	1.4104	–	430F	430F
49			430L				–
50	10Cr17Mo	SUS434	434	S43400	STS434	1.4113	–	434	434
51		SUS436L	436L				–
52	022Cr18NbTi	–	–	S43940	–	1.4509	–	439	439
53	019Cr19Mo2NbTi	SUS444	444	S44400	STS444	1.4521	–	444	444
54	–	–	446	–	–	–	–	–	–
55	00Cr18Mo2Ti	–	–	–	–	–	–	–	–
56	00Cr17Ti	–	–	–	–	–	–	–	–
57	12Cr12	SUS403	403	S40300	STS403	–	–	403	403
58	12Cr13	SUS410	410	S41000	STS410	1.4006	12Cr13	410	410
59		SUS414	414
60		SUS416	416			1.4005
61	20Cr13	SUS420J1	420	S42000	STS420J1	1.4021	20Cr13	420	420J1
62	30Cr13	SUS420J2	–	–	STS420J2	1.4028	30 Cr13	420J2	420J2
63		SUS420F
64	68Cr17	SUS440A	440A	S44002	STS440A	–	–	440A	440A
65		SUS440B	440B
66		SUS440f	440f
67		SUS440C	440C
68	2Cr16Ni2	SUS431	431	S43100	–	1.4057	–	431	431
69		SUS410J1	410J1
70		SUS420J1	429J1
71		–	–	–	–	–	–	–	–