 Origin |
China |
| Model Number |
UNS S32750, S31803, S31500 |
| Steel Grade |
300 Series |
| Type |
Seamless |
Duplex stainless steel tubes & pipes are with high mechanical strength, good elongation and weld ability which needs no pre-heating before welding and heat treatment after welding, low thermal expansion, excellent resistance to stress corrosion cracking, pitting and crevice corrosion, and high resistance to general corrosion in different environments. Duplex stainless steel tubes & pipes are applied to heat exchangers in refinery industries, petrochemical plants, paper & pulp industries, sugar & beverage industries.
Standards: ASTM/ASME A789/SA789, A790/SA790
Steel Grade: UNS S32750, S31803, S31500
Chemical Composition
|
Grade
|
C
max
|
Si
max
|
Mn max
|
P
max
|
S
max
|
Cr
|
Ni
|
Mo
|
N
|
|
UNS S32750
|
0.030
|
0.8
|
1.2
|
0.030
|
0.015
|
24.0-26.0
|
6.0-8.0
|
3.0-5.0
|
0.24-0.32
|
|
UNS S31803
|
0.030
|
1.0
|
2.0
|
0.020
|
0.020
|
21.0-23.0
|
4.50-6.50
|
2.50-3.50
|
0.08-0.20
|
|
UNS S31500
|
0.030
|
1.0
|
1.2-2.0
|
0.030
|
0.030
|
18.0-19.0
|
4.50-5.50
|
2.50-3.50
|
0.05-0.1
|
Physical Properties
|
Grade
|
Y.S.MPa min
|
T.S.Mpa min
|
Elongation %
|
Hardness HRC
|
|
UNS S32750
|
550
|
800
|
15
|
20
|
|
UNS S31803
|
450
|
620
|
25
|
20
|
|
UNS S31500
|
440
|
630
|
30
|
20
|
|
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