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AK Steel 439 ULTRA FORM® Stainless Steel

Category Metal , Ferrous Metal , Stainless Steel
Manufacturer AK Steel
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF AK Steel 439 ULTRA FORM® Stainless Steel.pdf
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Material Notes:
AK Steel 439 ULTRA FORM™ was developed for applications requiring oxidation and corrosion resistance superior to Type 409 as well as superior formability to AK Steel 439 Stainless Steel. As a result, the material offers advantages for parts requiring more complex shapes than possible from these stainless steels. Examples include tubular manifolds and other exhaust system components where temperatures may exceed the oxidation limit of Type 409, or where wet corrosion resistance, particularly to chlorides, is needed.Information provided by AK Steel.
Physical Properties Metric English Comments
Density 7.685 g/cc
0.2776 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 72.9
72.9
Annealed
74
74
Annealed, Transverse Orientation
85.4
85.4
5% Cold Worked
89.1
89.1
10% Cold Worked
92.1
92.1
15% Cold Worked
95.6
95.6
30% Cold Worked
96.9
96.9
50% Cold Worked
Tensile Strength, Ultimate 438 MPa
63500 psi
Annealed
484 MPa
70200 psi
5% Cold Worked
546 MPa
79200 psi
10% Cold Worked
618 MPa
89600 psi
15% Cold Worked
713 MPa
103000 psi
30% Cold Worked
785 MPa
114000 psi
50% Cold Worked
35.0 MPa

@Temperature 816 °C
5080 psi

@Temperature 1500 °F
70.0 MPa

@Temperature 704 °C
10200 psi

@Temperature 1300 °F
225 MPa

@Temperature 593 °C
32600 psi

@Temperature 1100 °F
373 MPa

@Temperature 371 °C
54100 psi

@Temperature 700 °F
404 MPa

@Temperature 204 °C
58600 psi

@Temperature 400 °F
462 MPa

@Temperature 23.9 °C
67000 psi

@Temperature 75.0 °F
Annealed, Transverse Orientation
Tensile Strength, Yield 263 MPa

@Strain 0.200 %
38100 psi

@Strain 0.200 %
Annealed
460 MPa

@Strain 0.200 %
66700 psi

@Strain 0.200 %
5% Cold Worked
544 MPa

@Strain 0.200 %
78900 psi

@Strain 0.200 %
10% Cold Worked
613 MPa

@Strain 0.200 %
88900 psi

@Strain 0.200 %
15% Cold Worked
680 MPa

@Strain 0.200 %
98600 psi

@Strain 0.200 %
30% Cold Worked
753 MPa

@Strain 0.200 %
109000 psi

@Strain 0.200 %
50% Cold Worked
25.0 MPa

@Strain 0.200 %,
Temperature 816 °C
3630 psi

@Strain 0.200 %,
Temperature 1500 °F
49.0 MPa

@Strain 0.200 %,
Temperature 704 °C
7110 psi

@Strain 0.200 %,
Temperature 1300 °F
130 MPa

@Strain 0.200 %,
Temperature 593 °C
18900 psi

@Strain 0.200 %,
Temperature 1100 °F
191 MPa

@Strain 0.200 %,
Temperature 371 °C
27700 psi

@Strain 0.200 %,
Temperature 700 °F
206 MPa

@Strain 0.200 %,
Temperature 204 °C
29900 psi

@Strain 0.200 %,
Temperature 400 °F
283 MPa

@Strain 0.200 %,
Temperature 21.1 °C
41000 psi

@Strain 0.200 %,
Temperature 70.0 °F
Annealed, Transverse Orientation
Elongation at Break 2.8 %
2.8 %
In 2", 50% Cold Worked
3.8 %
3.8 %
In 2", 30% Cold Worked
6.5 %
6.5 %
In 2", 15% Cold Worked
12 %
12 %
In 2", 10% Cold Worked
24.3 %
24.3 %
In 2", 5% Cold Worked
34.8 %
34.8 %
In 2", Annealed
35 %
35 %
In 2", Annealed, Transverse Orientation
Fatigue Strength 10.0 MPa

@# of Cycles 1.00e+7 ,
Temperature 816 °C
1450 psi

@# of Cycles 1.00e+7 ,
Temperature 1500 °F
r=0.1
28.0 MPa

@# of Cycles 1.00e+7 ,
Temperature 704 °C
4060 psi

@# of Cycles 1.00e+7 ,
Temperature 1300 °F
r=0.1
Component Elements Properties Metric English Comments
Carbon, C 0.010 %
0.010 %
Chromium, Cr 17.35 %
17.35 %
Iron, Fe 81.3535 %
81.3535 %
Balance
Manganese, Mn 0.25 %
0.25 %
Molybdenum, Mo 0.10 %
0.10 %
Nickel, Ni 0.20 %
0.20 %
Niobium, Nb (Columbium, Cb) 0.020 %
0.020 %
Nitrogen, N 0.010 %
0.010 %
Phosphorous, P 0.020 %
0.020 %
Silicon, Si 0.35 %
0.35 %
Sulfur, S 0.0015 %
0.0015 %
Titanium, Ti 0.335 %
0.335 %
Descriptive Properties Value Comments
Olsen Cup Height (in) 0.33
0.022"-0.028"
0.342
0.030"
0.371
0.035"
0.408
0.056"-0.059"
Typical rm value 1.62
0.056"-0.059"
1.78
0.035"
1.96
0.022"-0.028"
2.03
0.030"
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