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Carpenter 20Cb-3® Stainless Steel

Category Metal , Ferrous Metal , Stainless Steel , T 300 Series Stainless Steel
Manufacturer Carpenter Technology Corporation (Cartech)
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Carpenter 20Cb-3® Stainless Steel.pdf
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Material Notes:
Data provided by Carpenter Technology Corporation.20Cb-3® is an austenitic stainless steel possessing excellent resistance to hot sulfuric acid and many other aggressive environments which would readily attack Type 316 stainless. This alloy exhibits superior resistance to stress-corrosion cracking in boiling 20 to 40% sulfuric acid. 20Cb-3 stainless is also stabilized to limit intergranular attack, even in the sensitized condition. Corrosion tests on annealed and sensitized material conducted in the Ferric Sulfate - 50% Sulfuric Acid Test resulted in rates of 0.002 inches per month maximum. Important advantages of 20Cb-3 stainless are its excellent mechanical properties and comparative ease of fabrication. The presence of columbium in the alloy minimizes the precipitation of carbides during welding. Assemblies usually have been placed in service in the as-welded condition.This material has found wide use in all phases of the chemical and allied industries. It has been used extensively in the processing of synthetic rubber, high-octane gasoline, solvents, explosives, plastics, synthetic fibers, heavy chemicals, organic chemicals, pharmaceuticals, and agrichemicals. 20Cb-3 stainless has also been used in SO2 scrubbers where acid content, such as sulfuric acid, is of more concern than high-halogen content, such as chlorides. Other applications have included use in fans, mixing tanks, agitators, distillation towers, heat exchangers, process piping, bubble caps, metal cleaning and pickling tanks, spray pickling equipment, pump shafts and rods, valve stems, bolts, nuts, washers, tie rods, continuous-line pickling equipment including racks, etc.20Cb-3® is a registered trademark of Carpenter Technology Corporation.
Physical Properties Metric English Comments
Density 8.08 g/cc
0.292 lb/in³
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 627 MPa
90900 psi
200 MPa

@Temperature 871 °C
29000 psi

@Temperature 1600 °F
310 MPa

@Temperature 760 °C
45000 psi

@Temperature 1400 °F
531 MPa

@Temperature 538 °C
77000 psi

@Temperature 1000 °F
545 MPa

@Temperature 427 °C
79000 psi

@Temperature 801 °F
552 MPa

@Temperature 316 °C
80100 psi

@Temperature 601 °F
572 MPa

@Temperature 204 °C
83000 psi

@Temperature 399 °F
593 MPa

@Temperature 93.0 °C
86000 psi

@Temperature 199 °F
731 MPa

@Temperature -73.0 °C
106000 psi

@Temperature -99.4 °F
Transverse
752 MPa

@Temperature -73.0 °C
109000 psi

@Temperature -99.4 °F
Longitudinal
800 MPa

@Temperature -129 °C
116000 psi

@Temperature -200 °F
Transverse
827 MPa

@Temperature -129 °C
120000 psi

@Temperature -200 °F
Longitudinal
1034 MPa

@Temperature -196 °C
150000 psi

@Temperature -321 °F
Transverse
1062 MPa

@Temperature -196 °C
154000 psi

@Temperature -321 °F
Longitudinal
1124 MPa

@Temperature -253 °C
163000 psi

@Temperature -423 °F
Longitudinal
1241 MPa

@Temperature -253 °C
180000 psi

@Temperature -423 °F
Transverse
Tensile Strength, Yield 310 MPa

@Strain 0.200 %
45000 psi

@Strain 0.200 %
131 MPa

@Strain 0.200 %,
Temperature 871 °C
19000 psi

@Strain 0.200 %,
Temperature 1600 °F
179 MPa

@Strain 0.200 %,
Temperature 760 °C
26000 psi

@Strain 0.200 %,
Temperature 1400 °F
193 MPa

@Strain 0.200 %,
Temperature 538 °C
28000 psi

@Strain 0.200 %,
Temperature 1000 °F
207 MPa

@Strain 0.200 %,
Temperature 427 °C
30000 psi

@Strain 0.200 %,
Temperature 801 °F
228 MPa

@Strain 0.200 %,
Temperature 316 °C
33100 psi

@Strain 0.200 %,
Temperature 601 °F
241 MPa

@Strain 0.200 %,
Temperature 204 °C
35000 psi

@Strain 0.200 %,
Temperature 399 °F
276 MPa

@Strain 0.200 %,
Temperature 93.0 °C
40000 psi

@Strain 0.200 %,
Temperature 199 °F
407 MPa

@Strain 0.200 %,
Temperature -73.0 °C
59000 psi

@Strain 0.200 %,
Temperature -99.4 °F
Transverse
434 MPa

@Strain 0.200 %,
Temperature -73.0 °C
62900 psi

@Strain 0.200 %,
Temperature -99.4 °F
Longitudinal
462 MPa

@Strain 0.200 %,
Temperature -129 °C
67000 psi

@Strain 0.200 %,
Temperature -200 °F
Transverse
490 MPa

@Strain 0.200 %,
Temperature -129 °C
71100 psi

@Strain 0.200 %,
Temperature -200 °F
Longitudinal
552 MPa

@Strain 0.200 %,
Temperature -196 °C
80100 psi

@Strain 0.200 %,
Temperature -321 °F
Transverse
600 MPa

@Strain 0.200 %,
Temperature -196 °C
87000 psi

@Strain 0.200 %,
Temperature -321 °F
Longitudinal
683 MPa

@Strain 0.200 %,
Temperature -253 °C
99100 psi

@Strain 0.200 %,
Temperature -423 °F
Transverse
724 MPa

@Strain 0.200 %,
Temperature -253 °C
105000 psi

@Strain 0.200 %,
Temperature -423 °F
Longitudinal
Elongation at Break 45 %
45 %
In 50 mm
30 %

@Temperature -253 °C
30 %

@Temperature -423 °F
In 50 mm, Longitudinal
36 %

@Temperature -129 °C
36 %

@Temperature -200 °F
In 50 mm, Longitudinal
36 %

@Temperature -73.0 °C
36 %

@Temperature -99.4 °F
In 50 mm, Longitudinal
37 %

@Temperature -73.0 °C
37 %

@Temperature -99.4 °F
In 50 mm, Transverse to rolling direction
38 %

@Temperature 538 °C
38 %

@Temperature 1000 °F
In 50 mm
40 %

@Temperature -129 °C
40 %

@Temperature -200 °F
In 50 mm, Transverse to rolling direction
40 %

@Temperature 427 °C
40 %

@Temperature 801 °F
In 50 mm
42 %

@Temperature 316 °C
42 %

@Temperature 601 °F
In 50 mm
44 %

@Temperature 204 °C
44 %

@Temperature 399 °F
In 50 mm
46 %

@Temperature 93.0 °C
46 %

@Temperature 199 °F
In 50 mm
52 %

@Temperature 760 °C
52 %

@Temperature 1400 °F
In 50 mm
54 %

@Temperature -253 °C
54 %

@Temperature -423 °F
In 50 mm, Transverse to rolling direction
64 %

@Temperature -196 °C
64 %

@Temperature -321 °F
In 50 mm, Longitudinal
64 %

@Temperature -196 °C
64 %

@Temperature -321 °F
In 50 mm, Transverse to rolling direction
75 %

@Temperature 871 °C
75 %

@Temperature 1600 °F
In 50 mm
Reduction of Area 67 %
67 %
57 %

@Temperature 538 °C
57 %

@Temperature 1000 °F
60 %

@Temperature 427 °C
60 %

@Temperature 801 °F
65 %

@Temperature 316 °C
65 %

@Temperature 601 °F
67 %

@Temperature 204 °C
67 %

@Temperature 399 °F
68 %

@Temperature 93.0 °C
68 %

@Temperature 199 °F
75 %

@Temperature 760 °C
75 %

@Temperature 1400 °F
75 %

@Temperature 871 °C
75 %

@Temperature 1600 °F
Tensile Modulus 193 GPa

@Temperature 23.0 °C
28000 ksi

@Temperature 73.4 °F
Poissons Ratio 0.31

@Temperature 23.0 °C
0.31

@Temperature 73.4 °F
Shear Modulus 73.7 GPa

@Temperature 23.0 °C
10700 ksi

@Temperature 73.4 °F
Thermal Properties Metric English Comments
CTE, linear 14.69 µm/m-°C

@Temperature 25.0 - 100 °C
8.161 µin/in-°F

@Temperature 77.0 - 212 °F
15.91 µm/m-°C

@Temperature 25.0 - 450 °C
8.839 µin/in-°F

@Temperature 77.0 - 842 °F
17.15 µm/m-°C

@Temperature 25.0 - 900 °C
9.528 µin/in-°F

@Temperature 77.0 - 1650 °F
Specific Heat Capacity 0.500 J/g-°C
0.120 BTU/lb-°F
Component Elements Properties Metric English Comments
Carbon, C <= 0.060 %
<= 0.060 %
Chromium, Cr 19 - 21 %
19 - 21 %
Copper, Cu 3.0 - 4.0 %
3.0 - 4.0 %
Iron, Fe 36 %
36 %
as remainder
Manganese, Mn <= 2.0 %
<= 2.0 %
Molybdenum, Mo 2.0 - 3.0 %
2.0 - 3.0 %
Nb + Ta <= 1.0 %
<= 1.0 %
Nickel, Ni 32.5 - 35 %
32.5 - 35 %
Niobium, Nb (Columbium, Cb) <= 1.0 %
<= 1.0 %
min Nb = 8 x C content
Phosphorous, P <= 0.035 %
<= 0.035 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.035 %
<= 0.035 %
Tantalum, Ta <= 1.0 %
<= 1.0 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0001082 ohm-cm
0.0001082 ohm-cm
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