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

AISI 430FR Designation

AISI 430FR, wrought
Condition	Annealed
UNS number	S43000
US name	AISI 430FR

AISI 430FR Typical uses

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

AISI 430FR Composition detail

C (carbon)	0	–	0.06	%
Cr (chromium)	17.2	–	18.2	%
Fe (iron)	78.5	–	81.6	%
Mn (manganese)	0	–	0.8	%
Mo (molybdenum)	0	–	0.5	%
P (phosphorus)	0	–	0.03	%
S (sulfur)	0.24	–	0.4	%
Si (silicon)	1	–	1.5	%

AISI 430FR Physical properties

Density

7.57

–

7.77

g/cm^3

AISI 430FR Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25.3	–	26.8	MN.m/kg
Yield strength (elastic limit)	325	–	365	MPa
Tensile strength	538	–	655	MPa
Specific strength	42.3	–	47.7	kN.m/kg
Elongation	10	–	15	% 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	57
Hardness – Vickers	150	–	195	HV
Hardness – Rockwell B	80	–	88	HRB
Hardness – Rockwell C	0	–	12	HRC
Hardness – Brinell	161	–	179	HB
Elastic stored energy (springs)	264	–	333	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 430FR Impact & fracture properties

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

AISI 430FR 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	–	12	µstrain/°C
Thermal shock resistance	141	–	175	°C
Thermal distortion resistance	2.02	–	2.56	MW/m
Latent heat of fusion	260	–	285	kJ/kg

AISI 430FR Electrical properties

Electrical resistivity	70	–	76	µohm.cm
Electrical conductivity	2.27	–	2.46	%IACS
Galvanic potential	-0.18	–	-0.1	V

AISI 430FR Magnetic properties

Magnetic type	Magnetic
Coercive force Hc	127 A/m
Maximum permeability	2.6e3

AISI 430FR 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 430FR Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5030	–	5180	m/s
Mechanical loss coefficient (tan delta)	8.9e-4	–	0.00142

AISI 430FR Processing properties

Metal casting	Unsuitable
Metal cold forming	Unsuitable
Metal hot forming	Limited use
Metal press forming	Excellent
Metal deep drawing	Unsuitable
Machining speed	42.7 m/min
Weldability	Unsuitable
Weldability – MIG	Not recommended
Weldability – plasma	Not recommended
Weldability – SAW	Not recommended
Weldability – TIG	Not recommended
Brazeability	Fair
Carbon equivalency	0.607 – 0.777

AISI 430FR 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: Sufficient sulfur (> 0.15%) to improve resistance. Aluminum bronze is the most suitable mating material to minimize galling.	Acceptable
Flammability	Non-flammable

AISI 430FR Corrosion resistance

Pitting resistance equivalent number (PREN)	17.2 – 19.9
Pitting and crevice corrosion	Low (<20)
Stress corrosion cracking Note: Rated in chloride; Other susceptible environments: Hydrogen sulfide	Not susceptible
Intergranular (weld line) corrosion	Moderate
Inorganic acids	Restricted
Organic acids	Restricted
Alkalis	Moderate
Humidity / water	Excellent
Sea water	Good
Sour oil and gas	Poor

AISI 430FR Notes

AISI 430FR Warning

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

AISI 430FR Standards with similar compositions

Tradenames: CARPENTER 430FR SOLENOID QUALITY