AISI 436 Stainless Steel Material Data Sheet (Ferritic, Annealed)

AISI 436 Designation

AISI 436, wrought
Condition	Annealed
UNS number	S43600
US name	ASTM 436
EN name	X6CrMoNb17-1
EN number	~1.4526

AISI 436 Typical uses

Processing of potentially corrosive liquids e.g. chemicals/oil/beverages/sewage, structural uses in corrosive environments, e.g. nuclear plants, ships, offshore oil installations, underwater cables and pipes

AISI 436 Composition detail

C (carbon)	0	–	0.12	%
Cr (chromium)	16	–	18	%
Fe (iron)	78.5	–	83.2	%
Mn (manganese)	0	–	1	%
Mo (molybdenum)	0.75	–	1.25	%
Nb (niobium)	0	–	0.1	%
P (phosphorus)	0	–	0.04	%
S (sulfur)	0	–	0.03	%
Si (silicon)	0	–	1	%

AISI 436 Physical properties

Density

7.7

–

7.9

g/cm³

AISI 436 Mechanical properties

Young’s modulus	195	–	205	GPa
Specific stiffness	24.9	–	26.4	MN.m/kg
Yield strength (elastic limit)	325	–	405	MPa
Tensile strength	475	–	585	MPa
Specific strength	41.6	–	52	kN.m/kg
Elongation	17	–	29	% strain
Compressive strength	325	–	405	MPa
Flexural modulus	195	–	205	GPa
Flexural strength (modulus of rupture)	325	–	405	MPa
Shear modulus	75	–	81	GPa
Bulk modulus	144	–	159	GPa
Poisson’s ratio	0.275	–	0.285
Shape factor	56
Hardness – Vickers	145	–	170	HV
Hardness – Rockwell B	78	–	88	HRB
Hardness – Rockwell C	0	–	7	HRC
Hardness – Brinell	126	–	165	HB
Elastic stored energy (springs)	267	–	406	kJ/m³
Fatigue strength at 10^7 cycles	254	–	295	MPa
Fatigue strength model (stress range) _{Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles}	220	–	340	MPa

AISI 436 Impact & fracture properties

Fracture toughness	60	–	97	MPa.m^0.5
Toughness (G)	18.9	–	44.9	kJ/m²

AISI 436 Thermal properties

Melting point	1430	–	1510	°C
Maximum service temperature	725	–	776	°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	9	–	10	µstrain/°C
Thermal shock resistance	169	–	216	°C
Thermal distortion resistance	2.39	–	2.89	MW/m
Latent heat of fusion	260	–	285	kJ/kg

AISI 436 Electrical properties

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

AISI 436 Magnetic properties

Magnetic type

Magnetic

AISI 436 Optical, aesthetic and acoustic properties

Transparency	Opaque
Acoustic velocity	4990	–	5140	m/s
Mechanical loss coefficient (tan delta)	8.6e-4	–	0.00107

AISI 436 Processing properties

Metal casting	Unsuitable
Metal cold forming	Excellent
Metal hot forming	Acceptable
Metal press forming	Excellent
Metal deep drawing	Excellent
Machining speed	30.2 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 436 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 436 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