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ATI Allegheny Ludlum AL 444™ Ferritic Stainless Steel

Category Metal , Ferrous Metal , Ferritic , Stainless Steel , T S40000 Series Stainless Steel
Manufacturer ATI Allegheny Ludlum
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF ATI Allegheny Ludlum AL 444™ Ferritic Stainless Steel.pdf
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Material Notes:
Low carbon, low nitrogen ferritic stainless steel alloy. Characteristics:practically immune to chloride stress corrosion cracking, enhanced resistance to pitting and crevicing, good general corrosion resistance, good creep resistance. Applications: heat exchangers tubing, food processing equipment, automotive exhausts, and hot water tanks. Information provided by Allegheny Ludlum
Physical Properties Metric English Comments
Density 7.75 g/cc
0.280 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 80
80
Tensile Strength, Ultimate 517 MPa
75000 psi
Tensile Strength, Yield 345 MPa

@Strain 0.200 %
50000 psi

@Strain 0.200 %
Elongation at Break 30 %
30 %
in 2"
Thermal Properties Metric English Comments
CTE, linear 11.0 µm/m-°C

@Temperature 20.0 - 200 °C
6.11 µin/in-°F

@Temperature 68.0 - 392 °F
Specific Heat Capacity 0.427 J/g-°C
0.102 BTU/lb-°F
Thermal Conductivity 26.8 W/m-K

@Temperature 100 °C
186 BTU-in/hr-ft²-°F

@Temperature 212 °F
Component Elements Properties Metric English Comments
Carbon, C 0.013 %
0.013 %
Chromium, Cr 18.2 %
18.2 %
Iron, Fe >= 79.79 %
>= 79.79 %
As Remainder
Manganese, Mn 0.30 %
0.30 %
Molybdenum, Mo 1.9 %
1.9 %
Nickel, Ni <= 0.50 %
<= 0.50 %
Niobium, Nb (Columbium, Cb) 0.27 %
0.27 %
Nitrogen, N 0.015 %
0.015 %
Other 0.40 %
0.40 %
Phosphorous, P <= 0.030 %
<= 0.030 %
Silicon, Si 0.45 %
0.45 %
Sulfur, S <= 0.0020 %
<= 0.0020 %
Titanium, Ti 0.13 %
0.13 %
Descriptive Properties Value Comments
Corrosion Rate mils per year >1000
10% Sulfamic Acid, Boiling
>1000
10% Sulfuric Acid, Boiling
0.1
20% Acetic Acid, Boiling
1.7
1% Hydrochloric Acid, Boiling
101
10% Oxalic Acid, Boiling
18
65% Nitric Acid, Boiling
2.3
20% Phosphoric Acid, Boiling
27.1
45% Formic Acid, Boiling
293
50% Sodium Hydroxide, Boiling
Pitting Potential, Volts vs. Sat. Calomel Electrode 0.58
Stress Corrosion Cracking Resistance (ASTM G30) Pass
42% MgCl2
Pass
33% LiCl
Pass
26% NaCl
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