ASME A/SA 789 UNS S32304 Duplex Steel Seamless Pipes

UNS S32304 / 1.4362 / SAF2304 Duplex Alloy 2304 Stainless Steel Seamless Pipe

SAKY METAL S32304 stainless steel is a duplex stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. S32304 is the UNS number for this material. Alloy 2304 is the common industry name. It has a fairly low tensile strength among the wrought duplex stainless steels in the database.

The graph bars on the material properties cards below compare S32304 stainless steel to: wrought duplex stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it’s 50% of the highest, and so on.

Specifications of Duplex Steel UNS S32304 seamless pipe :

1. Standard Spec.: ASTM A240 ,A789,A790;ASME SA 240 SA789/790

2. Lean Duplex SS – lower nickel and no molybdenum – 2101, 2102, 2202, 2304

Duplex SS – higher nickel and molybdenum – 2205, 2003, 2404

Super Duplex – 25Chromium and higher nickel and molybdenum “plus” – 2507, 255 and Z100

Hyper Duplex – More Cr, Ni, Mo and N – 2707

3. OD Range: 6 ~ 860mm;

4. Wall Thickness Range: 0.5 ~ 60mm

5. Surface Finish : Mill,Pickled, Sandblast,Polishing,etc

6. Techniques: Hot-rolled or cold-drawn

Table of Contents

Duplex Pipe Chemical Composition:

UNS
Designation
C
Mn
P
S
Si
Ni
Cr
Mo
N
Cu
Others
S31803
0.03
2.00
0.03
0.02
1
4.50–6.50
21.0–23.0
2.50–3.50
0.08–0.20
.
.
S31500
0.03
1.20–2.00
0.03
0.03
1.40–2.00
4.25–5.25
18.0–19.0
2.50–3.00
0.05–0.10
 
 
S32550
0.04
1.50
0.04
0.03
1
4.50–6.50
24.0–27.0
2.90–3.90
0.10–0.25
1.5–2.5
 
S31200
0.03
2.00
0.045
0.03
1
5.50–6.50
24.0–26.0
1.20–2.00
0.14–0.20
.
.
S31260
0.03
1.00
0.03
0.03
0.75
5.50–7.50
24.0–26.0
2.50–3.50
0.10–0.30
0.20–0.80
W 0.10–0.50
S32304
0.03
2.50
0.04
0.04
1
3.0–5.5
21.5–24.5
0.05–0.60
0.05–0.20
0.05–0.60
 
S39274
0.03
1.00
0.03
0.02
0.8
6.0–8.0
24.0–26.0
2.50–3.50
0.24–0.32
0.20–0.80
W 1.50–2.50
S32750
0.03
1.20
0.035
0.02
0.8
6.0–8.0
24.0–26.0
3.0–5.0
0.24–0.32
0.5
 
S32760
0.05
1.00
0.03
0.01
1
6.00–8.00
24.00–26.00
3.00–4.00
0.20–0.30
0.50–1.00
W 0.50–1.00
S32900
0.08
1.00
0.04
0.03
0.75
2.50–5.00
23.00–28.00
1.00–2.00
.
.
.
S32950
0.03
2.00
0.035
0.01
0.6
3.50–5.20
26.00–29.00
1.00–2.50
0.15–0.35
.
.
S39277
0.025
0.80
0.025
0.002
0.8
6.5–8.00
24.00–26.00
3.00–4.00
0.23–0.33
1.2–2.0
W 0.8–1.2

Duplex Steel Seamless Pipes Equivalent:

GradeGBUNS No.AFNOREN No.FranceJIS
Lean Duplex00Cr23Ni4NUN23
(SAF2304)
SS232
(SAF2304)
W.Nr.1.4362UR35NDP11
Duplex SS00Cr18Ni5Mo3Si2
00Cr22Ni5Mo3N
UNS S31500
UNS S31803
SS2376(3RE60)
SS2377(SAF2205)
W.Nr.1.4417
W.Nr.1.4462
UR45NDP1
DP8
0Cr25Ni5Mo2
00Cr25Ni7Mo3WCuN
UNS S32900
UNS S31260
SS2324(10RE51)W.Nr.1.4460
W.Nr.1.4501
 329J1
329J2L
Super Duplex00Cr25Ni7Mo4N
00Cr25Ni6Mo3CuN
UNS S32750
UNS S32550
SS2328(SAF2507)W.Nr.1.4410
W.Nr.1.4507
 UR47N+
UR52N+
Hyper Duplex UNS S32707    

DUPLEX STEEL TENSILE AND HARDNESS REQUIREMENTS:

UNS
Designation
Tensile Strength min, ksi
[MPa]
Yield Strength,
min, ksi [MPa]
Elongation in
2 in. or 50
mm, min, %
Hardness, max
Brinell
Hardness, max
Rockwell C
S31803
90 [620]
65 [450]
25
290
30.5
S31500
92 [630]
64 [440]
30
290
30.5
S32550
110 [760]
80 [550]
15
297
31.5
S31200
100 [690]
65 [450]
25
280
.
S31260
100 [690]
65 [450]
25
.
.
S32304
87 [600]
58 [400]
25
290
30.5
S39274
116 [800]
80 [550]
15
310
.
S32750
116 [800]
80 [550]
15
310
32
S32760
109–130 [750–895]
80 [550]
25
270
.
S32900
90 [620]
70 [485]
20
271
28
S32950
100 [690]
70 [480]
20
290
30.5
S39277
120 [825]
90 [620]
25
290
30

NOTES:
(1) Prior to A 790/A 790M – 87, the values for S31260 were: 92 ksi tensile strength, 54 ksi yield strength, and 30% elongation.
(2) Prior to A 790/A 790M – 89, the tensile strength value was 90 ksi for UNS S32950.

DIMENSIONS OF WELDED AND SEAMLESS DUPLEX STEEL PIPE :

 
 
Outside Diameter
Nominal Wall Thickness
 
 
 
Schedule 5S [Note (1)]
 
Schedule 10S [Note (1)]
Schedule 40S
Schedule 80S
NPS
Designator
in.
mm
in.
MM
in.
MM
in.
MM
in.
MM
1⁄8
0.405
10.29
0.049 [Note (2)]
1.24
0.068
1.73
0.095
2.41
1⁄4
0.54
13.72
0.065 [Note (2)]
1.65
0.088
2.24
0.119
3.02
3⁄8
0.675
17.15
0.065 [Note (2)]
1.65
0.091
2.31
0.126
3.2
1⁄2
0.84
21.34
0.065 [Note (2)]
1.65
0.083 [Note (2)]
2.11
0.109
2.77
0.147
3.73
3⁄4
1.05
26.67
0.065 [Note (2)]
1.65
0.083 [Note (2)]
2.11
0.113
2.87
0.154
3.91
1
1.315
33.4
0.065 [Note (2)]
1.65
0.109 [Note (2)]
2.77
0.133
3.38
0.179
4.55
11⁄4
1.66
42.16
0.065 [Note (2)]
1.65
0.109 [Note (2)]
2.77
0.14
3.56
0.191
4.85
11⁄2
1.9
48.26
0.065 [Note (2)]
1.65
0.109 [Note (2)]
2.77
0.145
3.68
0.2
5.08
2
2.375
60.33
0.065 [Note (2)]
1.65
0.109 [Note (2)]
2.77
0.154
3.91
0.218
5.54
21⁄2
2.875
73.03
0.083
2.11
0.120 [Note (2)]
3.05
0.203
5.16
0.276
7.01
3
3.5
88.9
0.083
2.11
0.120 [Note (2)]
3.05
0.216
5.49
0.3
7.62
31⁄2
4
101.6
0.083
2.11
0.120 [Note (2)]
3.05
0.226
5.74
0.318
8.08
4
4.5
114.3
0.083
2.11
0.120 [Note (2)]
3.05
0.237
6.02
0.337
8.56
5
5.563
141.3
0.109 [Note (2)]
2.77
0.134 [Note (2)]
3.4
0.258
6.55
0.375
9.52
6
6.625
168.28
0.109
2.77
0.134 [Note (2)]
3.4
0.28
7.11
0.432
10.97
8
8.625
219.08
0.109 [Note (2)]
2.77
0.148
3.76
0.322
8.18
0.5
12.7
10
10.75
273.05
0.134 [Note (2)]
3.4
0.165
4.19
0.365
9.27
0.500 [Note (2)]
12.70 [Note (2)]
12
12.75
323.85
0.156  [Note (2)]
3.96
0.18
4.57
0.375 [Note (2)]
9.52 [Note (2)]
0.500 [Note (2)]
12.70 [Note (2)]
14
14
355.6
0.156 [Note (2)]
3.96
0.188
4.78
16
16
406.4
0.165 [Note (2)]
4.19
0.188
4.78
18
18
457.2
0.165 [Note (2)]
4.19
0.188
4.78
20
20
508
0.188 [Note (2)]
4.78
0.218
5.54
22
22
558.8
0.188 [Note (2)]
4.78
0.218
5.54
24
24
609.6
0.218 [Note (2)]
5.54
0.25
6.35
30
30
762
0.25
6.35
0.312
7.92

GENERAL NOTE: The decimal thickness listed for the respective pipe sizes represents their nominal or average wall dimensions.
NOTES:
(1) Schedules 5S and 10S wall thicknesses do not permit threading in accordance with the American National Standard for Pipe Threads (ANSI B1.20.1).
(2) These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe (ANSI B36.10-1979).

ASTM Specifications :

Pipe Smls

Pipe Welded

Tube Smls

Tube Welded

Sheet/Plate

Bar

Flanges & Fittings

A790

A790

A789

A789

A240

A276

A182

Duplex Steel Corrosion Resistance Comparison :

S32304 DUPLEX PIPES corrosion resistance

DUPLEX 2304 STAINLESS STEEL PIPE CORROSION RESISTANCE:

Duplex 2304 duplex stainless steel pipe PRE value of 25, and 316L stainless steel value equivalent. The CPT value of duplex 2304 stainless steel pipewas higher than that of 304L, which was equivalent to that of 316L when the critical pitting temperature (CPT) and chloride ion content of several steels were tested in NaCl solution at 300mV.

The results of several steels in the neutral chloride solution of the autoclave found that the applied stress was equivalent to the yield strength of the steel at this temperature, and the test time was 1000 h, where the stress corrosion cracking did not occur under the curve.

In addition SAF2304 duplex 2304 stainless steel pipe corrosion resistance between the good, can be CuSO4 + H2SO4 copper method test. SAF2304 dual phase steel in nitric acid has a good corrosion resistance, can be comparable with 304L, in other acids, such as sulfuric acid, its corrosion resistance with 316L, and in organic acids, such as formic acid, and even better than 316L.


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Quality Assurance(including both Destructive and Non-Destructive)

1. Visual Dimension Test
2. Mechanical examining like tensile, Elongation and reduction of area.
3. Impact analysis
4. Chemical examination analysis
5. Hardness test
6. Pitting protection test
7. Penetrant Test
8. Intergranular Corrosion Testing
9. Roughness Testing
10. Metallography Experimental Test

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