AISI 430 Round Bars

AISI 430 hot rolled round bar is a ferritic chromium stainless bar used for machined parts in mild indoor and water service.

16 to 125 mm Ferritic stainless steel Made to order

HOT ROLLED ROUND BARS

AISI 430 hot rolled round bar

AISI 430 hot rolled round bar is a ferritic stainless steel bar rolled from a chromium steel that carries no nickel. Chromium of 16.0 to 18.0 percent gives the corrosion resistance, and carbon held to 0.12 percent maximum keeps the steel soft enough to machine and form. The grade is specified in place of AISI 304 where the service is mild, where the greater corrosion resistance and toughness of 304 are not needed, and where a nickel free steel is wanted. It is specified in place of AISI 410 where the finished part is not meant to be hardened, since 410 takes its strength from quenching and tempering while 430 cannot be hardened by heat treatment. The bar is magnetic in every condition.

The bar is supplied annealed, the condition ASTM A276 covers for Type 430, for which that standard sets a tensile strength of 485 MPa minimum and a yield strength of 275 MPa minimum. Annealed 430 work hardens less than the austenitic grades, so it turns and threads more predictably and holds size better on long runs. Welding coarsens the grain beside the joint and lowers its toughness, so welded sections are often annealed again afterwards. Bar of this grade is turned into shafts and spindles for domestic appliances and kitchen equipment, studs and fasteners for indoor use, bushes and valve parts for mild water service, and machined architectural fittings. Laxcon Steels rolls the bar to order.

Composition limits in weight percent are carbon 0.12 maximum, manganese 1.0 maximum, sulphur 0.03 maximum, phosphorus 0.04 maximum, silicon 1.0 maximum and chromium 16.0 to 18.0.

SPECIFICATION

AISI 430 hot rolled round bar supply conditions

Size range: 16 mm - 125 mm (5/8" - 5")
Length: Up to 8 metres
Tolerances: ASTM A484, EN10060
Heat treatment: Soft annealing
Grade: AISI 430 (430, SUS 430, 1.4016, S43000)
Family: Ferritic stainless steel
Supply: Made to order in this grade; every published size of the form

Composition of AISI 430

Element	Symbol	Minimum %	Maximum %
Carbon	C		0.12
Manganese	Mn		1.0
Sulphur	S		0.03
Phosphorus	P		0.04
Silicon	Si		1.0
Chromium	Cr	16.0	18.0

Composition, weight percent, balance iron. From the Laxcon Steels grade reference.

Equivalents of AISI 430

Standard	Designation
UNS	S43000
EN number	1.4016 (X6Cr17)
JIS	SUS 430

Equivalence means nearest counterpart, not identity: each standards body sets its own composition window, so the limits of the standard named on the order govern.

Governing standards

EN 10088-3: Stainless steels: technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products for general purposes. Composition, heat treatment condition and mechanical properties per grade.
EN 10060: Hot rolled round steel bars for general purposes: dimensions and tolerances on shape and dimensions.
ASTM A276/A276M: Stainless steel bars and shapes: composition, condition, mechanical properties and finish designations for hot-finished and cold-finished bar.
ASTM A484/A484M: General requirements for stainless steel bars, billets and forgings: permissible variations in dimensions, straightness, weight and length, and the test and marking requirements every bar order inherits.
ASTM A479/A479M: Stainless steel bars and shapes for use in boilers and other pressure vessels: the bar specification a pressure-part drawing calls for.
ASTM A314: Stainless steel billets and bars for forging.
NACE MR0175 / ISO 15156: Materials for use in H2S-containing environments in oil and gas production: the sour-service limits on hardness and condition.
EN 10204: Metallic products, types of inspection documents: the 2.2 test report and the 3.1 and 3.2 inspection certificates a purchase order can call for.

Weight per metre

Diameter (mm)	kg per metre	Metres per tonne
16	1.59	629.5
17	1.79	557.6
18	2.01	497.4
19	2.24	446.4
20	2.48	402.9
21	2.74	365.4
22	3.00	333.0
23.2	3.34	299.4
24	3.57	279.8
25	3.88	257.9
26	4.19	238.4
27	4.52	221.1
28	4.86	205.6
30	5.58	179.1
32	6.35	157.4
34	7.17	139.4
36	8.04	124.4
37	8.49	117.7
38	8.96	111.6
40	9.93	100.7
42	10.95	91.4
45	12.57	79.6
47	13.71	73.0
48	14.30	69.9
50	15.51	64.5
53	17.43	57.4
56	19.46	51.4
57.5	20.52	48.7
60	22.34	44.8
63	24.63	40.6
66	27.03	37.0
67.5	28.27	35.4
70	30.40	32.9
73.5	33.52	29.8
75	34.90	28.7
77.5	37.27	26.8
80	39.71	25.2
83	42.75	23.4
85	44.83	22.3
88	48.05	20.8
90	50.26	19.9
93	53.67	18.6
95	56.00	17.9
98	59.59	16.8
100	62.05	16.1
105	68.41	14.6
106	69.72	14.3
110	75.08	13.3
115	82.06	12.2
120	89.35	11.2
125	96.95	10.3

Density 7.90 g/cm³, diameter squared x 0.006205. Sizes are the published range at the nominal diameters shown.

Ordering AISI 430 hot rolled round bar

An enquiry for this grade in this form states the grade and the standard it is ordered to, EN 10088-3 or ASTM A276, the annealed condition, the diameter with the tolerance class to ASTM A484 or EN 10060, the cut length, the quantity, the certificate type to EN 10204, and any further test required, such as ultrasonic examination or confirmation of grade by handheld PMI.