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Shanghai Jw Steel Co., Ltd.
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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
For sizes please check with our office for further confirmation.
Marking: JW, material grade, standard, specification, heat no.
Length: unbending length or fix length
Package: knitting strip bundle, wooden box or steel box
Mill test certificate: according to EN 10204 3.1B
Value added service:
Third party inspection
Bright annealed, polished outside and inside surface
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