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

AISI 430F Designation

AISI 430F, wrought
Condition	Annealed
UNS number	S43020
US name	ASTM S43023, ASTM S43020

AISI 430F Composition detail

C (carbon)	0	–	0.12	%
Cr (chromium)	16	–	18	%
Fe (iron)	78.7	–	83.8	%
Mn (manganese)	0	–	1.25	%
Mo (molybdenum)	0	–	0.6	%
P (phosphorus)	0	–	0.06	%
S (sulfur)	0.15	–	0.25	%
Si (silicon)	0	–	1	%

AISI 430F Physical properties

Density

7.62

–

7.82

g/cm3

AISI 430F Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25.2	–	26.6	MN.m/kg
Yield strength (elastic limit)	430	–	470	MPa
Tensile strength	538	–	655	MPa
Specific strength	55.6	–	61	kN.m/kg
Elongation	10	–	15	% strain
Compressive strength	205	–	370	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	430	–	470	MPa
Shear modulus	75	–	81	GPa
Poisson’s ratio	0.275	–	0.285
Shape factor	50
Hardness – Vickers	192	–	204	HV
Hardness – Rockwell B	90	–	92	HRB
Hardness – Rockwell C	9	–	12	HRC
Hardness – Brinell	185	–	195	HB
Elastic stored energy (springs)	462	–	553	kJ/m3
Fatigue strength at 10^7 cycles	237	–	300	MPa
Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles	214	–	332	MPa

AISI 430F Impact & fracture properties

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

AISI 430F 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	11.5	–	12.5	µstrain/°C
Thermal shock resistance	176	–	200	°C
Thermal distortion resistance	1.9	–	2.27	MW/m
Latent heat of fusion	387	–	468	kJ/kg

AISI 430F Electrical properties

Electrical resistivity	53	–	76	µohm.cm
Electrical conductivity	2.27	–	3.25	%IACS
Galvanic potential	-0.2	–	-0.12	V

AISI 430F Magnetic properties

Magnetic type

Magnetic

AISI 430F Optical, aesthetic and acoustic properties

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

AISI 430F Processing properties

Metal casting	Unsuitable
Metal cold forming	Unsuitable
Metal hot forming	Limited use
Metal press forming	Excellent
Metal deep drawing	Unsuitable
Machining speed	33.5 m/min
Weldability	Unsuitable
Weldability – MIG	Not recommended
Weldability – plasma	Not recommended
Weldability – SAW	Not recommended
Weldability – TIG	Not recommended
Brazeability	Fair
Carbon equivalency	0.533 – 0.835

AISI 430F 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 430F Corrosion resistance of metals

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

AISI 430F Standards with similar compositions

Canada: 430F to CSA G110.3

China: Y1Cr17 to GB 1220, Y1Cr17 to GB 4226, Y1Cr17 to GB/T 4356, Y1Cr17(-Q) to GB/T 4240

France: Z10CF17 to AFNOR NF A35-576

International: X7CrS17 to ISO 16143-2, X7CrS17 to ISO 16143-3

Italy: X10CrS17 to UNI 6901

Japan: SUS430F to JIS G4303, SUS430F to JIS G4308, SUS430F to JIS G4309

Mexico: 430F to NMX-B-83

South Korea: STS430F to KS D 3702

Spain: E-430S to UNE 36016/1, F.3117 to UNE 36016, F.3117 to UNE 36016/1, X10CrS17 to UNE 36016

UK: S6CrMoS17 to BS EN 10088-1, X6CrMoS17 to BS EN 10088-3

USA: 430F to ASTM A473, S43020 to ASTM A314-97, S43020 to ASTM F2281, S43020 to ASTM F593, S43020 to ASTM F594, S43020 to ASTM F738M, S43020 to ASTM F836M, UNS S43020

Tradenames: BOHLER N244, CARPENTER 430F SOLENOID QUALITY, DOMINIAL RM 161 A, SLATER TYPE 430 F, UNILOY 430 F, X17Z