Duplex stainless steel offers excellent resistant to corrosion and very high mechanical strength. The high corrosion resistance of duplex stainless steel ensures significantly more uptime than carbon steels and conventional stainless steels, while the mechanical strength allows for lighter constructions, more compact system design and less welding.
We can produce and deliver nearly any duplex material requirement in pipe, tube or fittings.
Chemical Composition
Grade |
Chemical Composition |
C (max) |
Si (max) |
Mn (max) |
P (max) |
S (max) |
Cr |
Ni |
Mo |
N |
Cu |
S32750 |
0.030 |
0.8 |
1.2 |
0.030 |
0.015 |
24.0-26.0 |
6.8-8.0 |
3.0-5.0 |
0.24-0.32 |
0.5 max |
S13803 |
0.030 |
1.0 |
2.0 |
0.030 |
0.020 |
21.0-23.0 |
4.50-6.50 |
2.50-3.50 |
0.08-0.20 |
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Physical Propertie
Grade |
Physical Propertie |
Y.S. MPa (min) |
T.S. MPa (min) |
Elongation % |
Hardness HRC |
S32750 |
550 |
800 |
15 |
31 |
S13803 |
450 |
620 |
25 |
31 |
Size range for duplex pipes
W.T. |
1.0 |
1.2 |
1.5 |
1.65 |
2.0 |
2.11 |
2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.5 |
7.0 |
7.5 |
8.0 |
8.5 |
9.0 |
15 |
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16 |
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18 |
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19.05 |
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22 |
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25.4 |
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31.8 |
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35 |
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38.1 |
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42 |
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45 |
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50.8 |
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55 |
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60 |
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65 |
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70 |
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75 |
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80 |
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90 |
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101.6 |
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114.3 |
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121 |
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127 |
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133 |
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141.3 |
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159 |
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168.3 |
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Note: For sizes other than given, please check with our office for further confirmation.