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ASTM A789 A789M, ASME SA789 S31803, S32205, S32750 Duplex Stainless Tubing is for Boilers, Superheaters and Heat Exchangers.
ASTM A789 A789M Covers Grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
ASTM A789 A789M Stainless Steel tubes Grades S31803, S32205, S31500, S32550, S31200, S31260, S32001, S32304, S39274, S32750, S32760, S32900, S32950, S39277, S32520, S32906.
ASTM A789 A789M Stainless tubes shall be made by the seamless or welded process with no filler metal added.
Seamless pipe & Tube Size: 1/2”to 8”.
Welded pipe & Tube Size: 6”to 24”.
Schedules: 10s, 20, 40s, 40, 60, 80s, 80, 100, 120, 140, 160, XXH.
Wall Thickness: 1mm to 50mm.
Length: Single Random Length, Double Random Length, or as customer’s actual request. Max length 25000mm.
Chemical Composition:
|
UNS |
Composition, % |
||||||||||
|
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
N |
Cu |
Others |
|
|
S31803 |
0.03 |
2 |
0.03 |
0.02 |
1 |
4.5-6.5 |
21.0-23.0 |
2.5-3.5 |
0.08-0.20 |
. . . |
. . . |
|
S32205 |
0.03 |
2 |
0.03 |
0.02 |
1 |
4.5-6.5 |
22-23 |
3.0-3.5 |
0.14-0.20 |
. . . |
. . . |
|
S31500 |
0.03 |
1.20-2.00 |
0.03 |
0.03 |
1.40-2.0 |
4.3-5.2 |
18-19 |
2.5-3.0 |
0.05-0.10 |
. . . |
. . . |
|
S32550 |
0.04 |
1.5 |
0.04 |
0.03 |
1 |
4.5-6.5 |
24-27 |
2.9-3.9 |
0.10-0.25 |
1.50-2.50 |
. . . |
|
S31200 |
0.03 |
2 |
0.045 |
0.03 |
1 |
5.5-6.5 |
24-26 |
1.-2.0 |
0.14-0.20 |
. . . |
. . . |
|
S31260 |
0.03 |
1 |
0.03 |
0.03 |
0.75 |
5.5-7.5 |
24-26 |
2.5-3.5 |
0.10-0.30 |
0.20-0.80 |
W 0.10-0.50 |
|
S32001 |
0.03 |
4.0-6.0 |
0.04 |
0.03 |
1 |
1.0-3.0 |
19.5-21.5 |
0.6 |
0.05-0.17 |
1.00 max |
. . . |
|
S32304 |
0.03 |
2.5 |
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 |
. . . |
|
S32750 |
0.03 |
1.2 |
0.035 |
0.02 |
0.8 |
6.0-8.0 |
24-26 |
3.0-5.0 |
0.24-0.32 |
0.50max |
. . . |
|
S32760 |
0.05 |
1 |
0.03 |
0.01 |
1 |
6.0-8.0 |
24-26 |
3.0-4.0 |
0.20-0.30 |
0.50-1.00 |
W 0.50-1.00 |
|
S32950 |
0.03 |
2 |
0.035 |
0.01 |
0.6 |
3.5-5.2 |
26-29 |
1.0-2.5 |
0.15-0.35 |
. . . |
. . . |
|
S32520 |
0.03 |
1.5 |
0.035 |
0.02 |
0.8 |
5.5-8.0 |
23-25 |
3.0-5.0 |
0.20-0.35 |
0.8 |
. . . |
Heat Treatment Requirements
|
UNS Designation |
Temperature |
Quench |
|
S31803 |
1870-2010 °F [1020-1100°C] |
Rapid cooling in air or water |
|
S32205 |
1870-2010 °F [1020-1100°C] |
Rapid cooling in air or water |
|
S31500 |
1800-1900 °F [980-1040°C] |
Rapid cooling in air or water |
|
S32550 |
1900 °F [1040°C] min. |
Rapid cooling in air or water |
|
S31200 |
1920-2010 °F [1050-1100°C] |
Rapid cooling in water |
|
S31260 |
1870-2010 °F [1020-1100°C] |
Rapid cooling in water |
|
S32001 |
1800-1950 °F [982-1066°C] |
Rapid cooling in air or water |
|
S32304 |
1700-1920 °F [925-1050°C] |
Rapid cooling in air or water |
|
S32750 |
1880-2060 °F [1025-1125°C] |
Rapid cooling in air or water |
|
S32760 |
2010-2085 °F [1100-1140°C] |
Rapid cooling in air or water |
|
S32950 |
1820-1880 °F [990-1025°C] |
Rapid cooling in water |
|
S32520 |
1975-2050 °F [1080-1120°C] |
Rapid cooling in air or water |
Tensile Requirements
|
Grade |
Tensile strength, min., ksi [MPa] |
Yield strength, min., ksi [MPa] |
Elongation in 2 in., or 50mm, min, % |
Hardness, Max Brinell |
|
S31803 |
90 [620] |
65 [450] |
25 |
290 |
|
S32205 |
95 [655] |
70 [485] |
25 |
290 |
|
S31500 |
92 [630] |
64 [440] |
30 |
290 |
|
S32550 |
110 [760] |
80 [550] |
15 |
297 |
|
S31200 |
100 [690] |
65 [450] |
25 |
280 |
|
S31260 |
100 [690] |
65 [450] |
25 |
290 |
|
S32001 |
90 [620] |
65 [450] |
25 |
290 |
|
S32304 |
100 [690] |
65 [450] |
25 |
290 |
|
S32750 |
116 [800] |
80 [550] |
15 |
310 |
|
S32760 |
109 [750] |
80 [550] |
25 |
300 |
|
S32950 |
100 [690] |
70 [480] |
20 |
290 |
|
S32520 |
112 [770] |
80 [550] |
25 |
310 |
