AISI 430 Stainless Steel Material Data Sheet (Ferritic, Annealed)

AISI 430 Designation

AISI 430, wrought
Condition	Annealed or annealed and cold or hot finished
UNS number	S43000
US name	ASTM WP430, ASTM S43036, ASTM S43000, ASTM MT430, ASTM F430, ASTM 430, ~ASTM S43023
EN name	X6Cr17
EN number	1.4511, 1.4016
GB (Chinese) name	~1Cr17
JIS (Japanese) name	SUS430

AISI 430 Typical uses

Auto trim, decorative and household trim, fasteners, flatware (dishes etc.), interior architectural sections, piping and heat exchanger tubings

AISI 430 Composition detail

C (carbon)	0	–	0.12	%
Cr (chromium)	16	–	18	%
Fe (iron)	79.8	–	84	%
Mn (manganese)	0	–	1	%
P (phosphorus)	0	–	0.04	%
S (sulfur)	0	–	0.03	%
Si (silicon)	0	–	1	%

AISI 430 Physical properties

Density

7.62

–

7.82

g/cm3

AISI 430 Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25.2	–	26.6	MN.m/kg
Yield strength (elastic limit)	245	–	345	MPa
Tensile strength	430	–	600	MPa
Specific strength	31.7	–	44.7	kN.m/kg
Elongation	17	–	30	% strain
Compressive strength	205	–	370	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	205	–	370	MPa
Shear modulus	75	–	81	GPa
Bulk modulus	144	–	159	GPa
Poisson’s ratio	0.275	–	0.285
Shape factor	60
Hardness – Vickers	150	–	195	HV
Hardness – Rockwell B	75	–	85	HRB
Hardness – Rockwell C	0	–	11	HRC
Hardness – Brinell	155	–	192	HB
Elastic stored energy (springs)	154	–	290	kJ/m3
Fatigue strength at 10^7 cycles	225	–	249	MPa
Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles	172	–	325	MPa

AISI 430 Impact & fracture properties

Fracture toughness	61	–	164	MPa.m0.5
Toughness (G)	21.9	–	114	kJ/m2

AISI 430 Thermal properties

Melting point	1430	–	1510	°C
Maximum service temperature	750	–	870	°C
Minimum service temperature	-73	–	-43	°C
Thermal conductivity	23	–	27	W/m.°C
Specific heat capacity	450	–	530	J/kg.°C
Thermal expansion coefficient	10	–	11	µstrain/°C
Thermal shock resistance	116	–	166	°C
Thermal distortion resistance	2.17	–	2.61	MW/m
Latent heat of fusion	260	–	285	kJ/kg

AISI 430 Electrical properties

Electrical resistivity	53	–	65	µohm.cm
Electrical conductivity	2.65	–	3.25	%IACS
Galvanic potential	-0.2	–	-0.12	V

AISI 430 Magnetic properties

Magnetic type	Magnetic
Coercive force Hc	159 A/m
Maximum permeability	2000

AISI 430 Magnetic properties information

Used as soft magnetic components in products such as solenoid housings, cores, and pole pieces. Although their magnetic properties are not generally as good as conventional soft magnetic alloys, they have been successfully used for magnetic components that must withstand corrosive environments. As such, they offer a cost-effective alternative to plated iron and silicon-iron components. In addition, the relatively high electrical resistivity of ferritic stainless steels has resulted in superior ac performance.

AISI 430 Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5020	–	5160	m/s
Mechanical loss coefficient (tan delta)	8.9e-4	–	0.00142

AISI 430 Processing properties

Metal casting	Unsuitable
Metal cold forming	Acceptable
Metal hot forming	Acceptable
Metal press forming	Excellent
Metal deep drawing	Excellent
Machining speed	30.5 m/min
Weldability Notes: Preheating and post weld heat treatments are required	Good
Weldability – MIG	Good
Weldability – plasma	Good
Weldability – SAW	Not recommended
Weldability – TIG	Good
Brazeability	Fair
Carbon equivalency	0.533 – 0.787

AISI 430 Durability

Water (fresh)	Excellent
Water (salt)	Excellent
Weak acids	Excellent
Strong acids	Acceptable
Weak alkalis	Excellent
Strong alkalis	Limited use
Organic solvents	Excellent
Oxidation at 500C	Excellent
UV radiation (sunlight)	Excellent
Galling resistance (adhesive wear) Notes: Aluminum bronze is the most suitable mating material to minimize galling.	Limited use
Flammability	Non-flammable

AISI 430 Corrosion resistance

Pitting resistance equivalent number (PREN)	16 – 18
Pitting and crevice corrosion	Low (<20)
Stress corrosion cracking Note: Rated in chloride; Other susceptible environments: Hydrogen sulfide	Slightly susceptible
Intergranular (weld line) corrosion	Moderate
Inorganic acids	Restricted
Organic acids	Restricted
Alkalis	Moderate
Humidity / water	Excellent
Sea water	Moderate
Sour oil and gas	Restricted

AISI 430 Notes

AISI 430 Warning

When used with nitric acid, failures due to crevice corrosion have been experienced.

AISI 430 Standards with similar compositions

Canada: 430 to CSA G110.3

China: 1Cr17 to GB 1221, 1Cr17 to GB 13296

Germany: 1.4016 to DIN 17440, 1.4016 to DIN 17441, 1.4016 to DIN EN 10088, X8CrTi17 to TGL 7143

India: 07Cr17 to IS 11169/2

International: X3CrNb17 to ISO 16143-1, X3CrNb17 to ISO 16143-2, X3CrNb17 to ISO 16143-3, X3CrTi17 to ISO 16143-1, X3CrTi17 to ISO 4955, X3CrTi17 to ISO 9328-7, X6Cr17 to ISO 16143-1, X6Cr17 to ISO 16143-2, X6Cr17 to ISO 16143-3, X6Cr17 to ISO 6931-2

Japan: SUS430 to JIS G4317

Mexico: 430 to NMX-B-83

Russia: 7 to COMECON PC4-70

South Korea: STS 430 to KS D 3706, STS 430F-W2 to KS D 3703, STS 430-W2 to KS D 3703, STS 430-WSB to KS D 3697, STS430 to KS D 3692, STS430 to KS D 3698, STS430 to KS D 3702, STS430 to KS D 3705, STS430F to KS D 3692

UK: S3CrNb17 to BS EN 10088-2, X3CrNb17 to BS EN 10088-1, X3CrNb17 to BS EN 10088-3, X3CrTi17 to BS EN 10088-1, X3CrTi17 to BS EN 10088-2, X3CrTi17 to BS EN 10296-2, X3CrTi17 to BS EN 10297-2, X6Cr17 to BS EN 10088-1, X6Cr17 to BS EN 10088-2, X6Cr17 to BS EN 10088-3, X6Cr17 to BS EN 10250-4, X6Cr17 to BS EN 10296-2, X6Cr17 to BS EN 10297-2

USA: 430 to FED QQ-S-763F, 430 to FED QQ-S-766D, 430F to MIL-S-862B, 5503 to AMS 5503, 5627 to AMS 5627, S43000 to ASTM A276, S43000 to ASTM A314-97, S43000 to ASTM A479/A479M, S43000 to ASTM A493-95, S43000 to ASTM A580/A580M-98, S43000 to ASTM A959, S43000 to ASTM F2281, S43000 to ASTM F593, S43000 to ASTM F594, S43000 to ASTM F738M, S43000 to ASTM F836M, S43020 to ASTM A581/A581M-95b, S43020 to ASTM A582/A582M-95b, S43020 to ASTM A895-89, S43020 to ASTM A959, TP430 to ASTM A268/A268M, UNS S43000

Tradenames: 12KH17, ACX 500, ACX 515, ACX 525, ALLEGHENY LUDLUM TYPE 430, ARCELORMITTAL K30, ARCELORMITTAL K30D, ARISTOLOY 430, C 18 W, DEFIRUST SPECIAL, DELHI GRADE A, DOMINIAL R 17 F, DOMINIAL RM 18, EKATIT 17, EKATIT 17 E, EKATIT 17 N, FONIX-16, INDUSTRIAL NO. 17, IN-FLUX 430-G/S, NOVONIT 4015, PHOENIX 430B, PURO CR, RDN 500, RDN 520, SANDVIK 1C34, SLATER TYPE 430, TIMKEN IRON-CHROMIUM (TYPE 430), U.S.S. 17, UGINOX F 17, UNILOY 430, UNILOY 430 TI, UNILOY 435, WESTIG 4016