ATI Allegheny Ludlum AL 433™ Ferritic Stainless Steel, Annealed

Category	Metal , Ferrous Metal , Stainless Steel , T 400 Series Stainless Steel
Manufacturer	ATI Allegheny Ludlum
Trade Name
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	ATI Allegheny Ludlum AL 433™ Ferritic Stainless Steel, Annealed.pdf
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Material Notes:

AL 433™ is a stainless steel in the ferritic family of alloys with Type 409 and Type 439. The AL 433 alloy contains 20% chromium for pitting and crevice corrosion resistance in the presence of chlorides and resistance to oxidation at elevated temperatures. An addition of 0.5% copper adds to corrosion resistance. Columbium (niobium) in the amount of about 0.5% is added for elevated temperature strength and also provides resistance to intergranular corrosion.The AL 433 alloy has a body-centered cubic, ferritic microstructure at all temperatures below the melting point. Fine columbium carbides may be visible in the ferrite matrix microstructure.The AL 433 alloy can be machined, welded and formed like other stabilized, ferritic stainless steels. AL 433 alloy is an excellent candidate for elevated temperature applications where strength, combined with fabricability are needed.Information provided by Allegheny Ludlum Corporation.

Physical Properties	Metric	English	Comments
Density	7.80 g/cc	0.282 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	79	79	typical
Tensile Strength, Ultimate	286 MPa @Temperature 649 °C	41500 psi @Temperature 1200 °F	typical
	401 MPa @Temperature 204 °C	58200 psi @Temperature 400 °F	typical
	492 MPa @Temperature 23.0 °C	71400 psi @Temperature 73.4 °F
Tensile Strength, Yield	286 MPa @Temperature 649 °C	41500 psi @Temperature 1200 °F	typical
	324 MPa @Temperature 23.0 °C	47000 psi @Temperature 73.4 °F
	401 MPa @Temperature 204 °C	58200 psi @Temperature 400 °F	typical
Elongation at Break	32 %	32 %	typical in 2" (50 mm)
Modulus of Elasticity	200 GPa	29000 ksi

Thermal Properties	Metric	English
CTE, linear	10.44 µm/m-°C @Temperature 20.0 - 100 °C	5.800 µin/in-°F @Temperature 68.0 - 212 °F
	10.8 µm/m-°C @Temperature 20.0 - 260 °C	6.00 µin/in-°F @Temperature 68.0 - 500 °F
	11.25 µm/m-°C @Temperature 20.0 - 480 °C	6.250 µin/in-°F @Temperature 68.0 - 896 °F
	11.7 µm/m-°C @Temperature 20.0 - 650 °C	6.50 µin/in-°F @Temperature 68.0 - 1200 °F
Specific Heat Capacity	0.460 J/g-°C @Temperature 20.0 °C	0.110 BTU/lb-°F @Temperature 68.0 °F
Thermal Conductivity	20.93 W/m-K	145.3 BTU-in/hr-ft²-°F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.010 %	0.010 %
Chromium, Cr	20 %	20 %
Copper, Cu	0.50 %	0.50 %
Iron, Fe	78 %	78 %	as balance
Manganese, Mn	0.30 %	0.30 %
Nickel, Ni	0.25 %	0.25 %
Niobium, Nb (Columbium, Cb)	<= 0.80 %	<= 0.80 %
Nitrogen, N	0.019 %	0.019 %
Phosphorous, P	0.021 %	0.021 %
Silicon, Si	0.39 %	0.39 %
Sulfur, S	0.0010 %	0.0010 %

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