AISI 434 Stainless Steel Material Data Sheet (Ferritic, Annealed)

AISI 434 Designation

AISI 434, wrought
Condition	Annealed
UNS number	S43400
US name	ASTM 434
EN name	X6CrMo17-1
EN number	~1.4113
GB (Chinese) name	1Cr17Mo
JIS (Japanese) name	SUS434

AISI 434 Typical uses

Car bumpers, flatware, vehicle trim, windscreen wiper blades.

AISI 434 Composition detail

C (carbon)	0	–	0.12	%
Cr (chromium)	16	–	18	%
Fe (iron)	78.6	–	83.2	%
Mn (manganese)	0	–	1	%
Mo (molybdenum)	0.75	–	1.25	%
P (phosphorus)	0	–	0.04	%
S (sulfur)	0	–	0.03	%
Si (silicon)	0	–	1	%

AISI 434 Physical properties

Density

7.59

–

7.8

g/cm3

AISI 434 Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	25.3	–	26.7	MN.m/kg
Yield strength (elastic limit)	245	–	405	MPa
Tensile strength	430	–	630	MPa
Specific strength	31.8	–	52.6	kN.m/kg
Elongation	17	–	33	% strain
Compressive strength	245	–	405	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	245	–	405	MPa
Shear modulus	75	–	81	GPa
Bulk modulus	144	–	159	GPa
Poisson’s ratio	0.275	–	0.285
Shape factor	59
Hardness – Vickers	150	–	195	HV
Hardness – Rockwell B	78	–	88	HRB
Hardness – Rockwell C	0	–	10	HRC
Hardness – Brinell	130	–	185	HB
Elastic stored energy (springs)	158	–	390	kJ/m3
Fatigue strength at 10^7 cycles	237	–	302	MPa
Fatigue strength model (stress range)	185	–	388	MPa

AISI 434 Impact & fracture properties

Fracture toughness	55	–	137	MPa.m0.5
Toughness (G)	17.5	–	81.3	kJ/m2

AISI 434 Thermal properties

Melting point	1430	–	1510	°C
Maximum service temperature	750	–	800	°C
Minimum service temperature	-73	–	-43	°C
Thermal conductivity	23	–	27	W/m.°C
Specific heat capacity	450	–	500	J/kg.°C
Thermal expansion coefficient	10	–	11	µstrain/°C
Thermal shock resistance	116	–	194	°C
Thermal distortion resistance	2.17	–	2.61	MW/m
Latent heat of fusion	260	–	285	kJ/kg

AISI 434 Electrical properties

Electrical resistivity	55	–	65	µohm.cm
Electrical conductivity	2.65	–	3.13	%IACS
Galvanic potential	-0.2	–	-0.12	V

AISI 434 Magnetic properties

Magnetic type

Magnetic

AISI 434 Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	5030	–	5170	m/s
Mechanical loss coefficient (tan delta)	8.4e-4	–	0.0013

AISI 434 Processing properties

Metal casting	Unsuitable
Metal cold forming	Excellent
Metal hot forming	Acceptable
Metal press forming	Excellent
Metal deep drawing	Excellent
Machining speed	28.7 m/min
Weldability Notes: Preheating and post weld heat treatment are not required	Good
Weldability – MIG	Good
Weldability – plasma	Good
Weldability – SAW	Not recommended
Weldability – TIG	Good
Brazeability	Fair
Carbon equivalency	0.583 – 0.87

AISI 434 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.	Acceptable
Flammability	Non-flammable

AISI 434 Corrosion resistance

Pitting resistance equivalent number (PREN)	18.5 – 22.1
Pitting and crevice corrosion	Medium (20-30)
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	Restricted

AISI 434 Standards with similar compositions

China: 1Cr17Mo to GB 1220, 1Cr17Mo to GB 4237, 1Cr17Mo to GB/T 3280, 1Cr17Mo to GB/T 4239, 1Cr17Mo to GB/T 4356, 1Cr17Mo to GB/T 6725

France: Z8CD17.01 to AFNOR NF A35-572, Z8CD17.01 to AFNOR NF A35-575

Germany: 1.4113 to DIN EN 10088, X6CrMo17-1 to DIN EN 10088

International: X6crMo17-1 to ISO 16143-2, X6CrMo17-1 to ISO 16143-3

Italy: X8CrMo17 to UNI 6901

Japan: SUS434 to JIS G4303, SUS434 to JIS G4304, SUS434 to JIS G4305, SUS434 to JIS G4306, SUS434 to JIS G4307, SUS434 to JIS G4308, SUS434-WSB to JIS G4315, SUS436L to JIS G4307

South Korea: STS 434 to KS D 3706, STS 434-WSB to KS D 3697, STS434 to KS D 3698, STS434 to KS D 3702, STS434 to KS D 3705

UK: 434S19 to BS 1449/2, 434S20 to BS 1554, X6CrMo17-1 to BS EN 10088-1, X6CrMo17-1 to BS EN 10088-2, X6CrMo17-1 to BS EN 10088-3, X6CrMoNb17-1 to BS EN 10088-1, X6CrMoNb17-1 to BS EN 10088-2, X6CrMoNb17-1 to BS EN 10088-3, X6CrMoNb17-1 to BS EN 10296-2

USA:S43400 to ASTM A240/A240M, S43400 to ASTM A959, S43400 to SAE J405, S43600 to ASTM A240/A240M, S43600 to ASTM A959, UNS S43400, UNS S43600

Tradenames:ACX 535, ALLEGHENY TYPE 434, ARGESTE 4113 IL/IM, EKATIT 4113, JOSLYN STAINLESS TYPE 434, JOSLYN STAINLESS TYPE 434 FM, NIROSTA 4113, RDN 550, UGINOX F 17 M, UNILOY 434, UNILOY 436, X17M