ASTM A789 UNS S31803 S32750 S32760 Duplex Stainless Steel Tubing

澳门凯发娱乐We offer ASTM A789 UNS S31803 S32750 S32760 Duplex Stainless Steel Tubing in wide range of sizes, both welded and seamless stainless steel tubing, duplex steel maintains high strength and excellent corrosion resistance so it can be applied in harsh environment。

ASTM A789 Duplex Stainless Steel Tubing Specifications

TypeSeamless Tubing
SpecificationASTM A789, ASME SA789
GradesUNS S31803, S32750, S32760
Outside Diameter1/2″ – 28″
Wall ThicknessAverage Wall or Minimum Wall
LengthSpecific Or Random
ConditionAnnealing pickling, Beight Annealing
Form:Round, U Bending, Coiled
ApplicationHeat Exchanger, Boiler, Water, High Pressure, Ornamental Purpose
Manufacturing MethodCold Rolling, Cold Drawn

ASTM A789 Specification

ASTM A789/A789M specification covers standard requirements for 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。

Heat and product analyses shall be performed wherein the steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, nitrogen, copper, and others.

All tubes shall be furnished in the heat-treated澳门凯发娱乐 condition in accordance with the specified temperature and quench conditions. When the final heat treatment is in a continuous furnace, or when heat treated condition is obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a lot shall be determined from the prescribed sizes of the tubes.

The material shall conform to the prescribed tensile and hardness properties. Mechanical tests such as tension test, flaring test (for seamless tubes), flange test (for welded tubes), hardness test, and reverse flattening test shall be performed on the steel tubing. Each tube shall also be subjected to the nondestructive electric test or the hydrostatic test.

ASTM A789 S31803

ASTM A789 S31803 is a Duplex Stainless Steel containing 21% – 23% chromium, 2.5% – 3.5% molybdenum, 4.5-6.5% nickel and 0.08% –0.20% nitrogen alloy. it provides localized, and stress corrosion resistance in addition to high strength properties.

ASTM A789 S32205

ASTM A789 S32205 is a Duplex Stainless Steel containing 22% – 23% chromium, 3。0% – 3。5% molybdenum, 4。5-6。5% nickel and 0。08% –0。20% nitrogen alloy。 it is usually as dual grade with S31803。

ASTM A789 S32750

ASTM A789 S32750 is a Super Duplex Stainless Steel containing 24% – 26% chromium, 3% – 5% molybdenum, and 6% – 8% nickel grade, Super Duplex has excellent pitting and crevice corrosion resistance,
X2CrNiMoN25-7-4, 1.4410, SAF 2507 and F53 are the equivalent grades.

ASTM A789 S32760

ASTM A789 S32750 is a Super Duplex Stainless Steel containing 24% – 26% chromium, 3% – 4% molybdenum, and 6% – 8% nickel grade, F55 and 1.4501 are equivalents.

Duplex Steel Chemical Composition

UNS DesignationCMnPSSiNiCrMoNCuOthers
S312000.0302.000.0450.0301.005.5–6.524.0–26.01.20–2.000.14–0.20. . .. . .
S312600.0301.000.0300.0300.755.5–7.524.0–26.02.5–3.50.10–0.300.20–0.80W 0.10–0.50
S315000.0301.20–2.000.0300.0301.40–2.004.3–5.218.0–19.02.50–3.000.05–0.1. . .. . .
S318030.0302.000.0300.0201.004.5–6.521.0–23.02.5–3.50.08–0.20. . .. . .
S320010.0304.00–6.000.0400.0301.001.0–3.019.5–21.50.600.05–0.171.00. . .
S320030.0302.000.0300.0201.003.0-4.019.5-22.51.50-2.000.14-0.20. . .. . .
S321010.0404.0-6.00.0400.0301.001.35-1.7021.0-22.00.10-0.800.20-0.250.10-0.80. . .
S322020.0302.000.0400.0101.001.00–2.8021.5–24.00.450.18–0.26. . .. . .
S322050.0302.000.0300.0201.004.5–6.522.0–23.03.0–3.50.14–0.20. . .. . .
S323040.0302.500.0400.0401.003.0–5.521.5–24.50.05–0.600.05–0.200.05–0.60. . .
S325060.0301.000.0400.0150.905.5–7.224.0–26.03.0–3.50.08–0.20. . .W 0.05–0.30
S325200.0301.500.0350.0200.805.5–8.023.0–25.03.–5.0.20–0.350.50–3.00. . .
S325500.041.500.0400.0301.004.5–6.524.0–27.02.9–3.90.10–0.251.50–2.50. . .
S327070.0301.500.0350.0100.505.5–9.526.0–29.04.0–5.00.30–0.501.0 maxCo 0.5–2.0
S327500.0301.200.0350.0200.806.0–8.024.0–26.03.0–5.00.24–0.320.50. . .
S327600.0301.000.0300.0101.006.0–8.024.0–26.03.0–4.00.20–0.300.50–1.00W 0.50–1.00
S328080.0301.100.0300.0100.507.0–8.227.0–27.90.80–1.200.30–0.40. . .W 2.10–2.50
S329000.081.000.0400.0300.752.5–5.023.0–28.01.00–2.00. . .. . .. . .
S329060.0300.80–1.500.0300.0300.805.8–7.528.0 –30.01.50–2.600.30–0.400.80. . .
S329500.0302.000.0350.0100.603.5–5.226.0–29.01.00–2.500.15–0.35. . .. . .
S332070.0301.500.0350.0100.806.0–9.029.0–33.03.0–5.00.40–0.601.0. . .
S392740.0301.000.0300.0200.806.0–8.024.0–26.02.5–3.50.24–0.320.20–0.80W 1.50–2.50
S392770.0250.800.0250.0020.806.5–8.024.0–26.03.00–4.000.23–0.331.20–2.00W 0.80–1.21
S820110.0302.0–3.00.0400.0201.001.00–2.0020.5–23.50.10–1.000.15–0.270.50. . .
S824410.0302.50–4.000.0350.0050.703.0–4.523.0–25.01.00–2.000.20–0.300.10–0.80 

Heat Treatment

UNS DesignationTemperature °F [°C]Quench
S312001920–2010 [1050–1100]rapid cooling in water
S312601870–2010 [1020–1100]rapid cooling in air or water
S315001800–1900 [980–1040]rapid cooling in air or water
S318031870–2010 [1020–1100]rapid cooling in air or water
S320011800–1950 [982–1066]rapid cooling in air or water
S320031850–2050 [1010–1120]rapid cooling in air or water
S321011870 [1020] minquenched in water or rapidly cooled by other means
S322021870–1975 [1020–1080]rapid cooling in air or water
S322051870–2010 [1020–1100]rapid cooling in air or water
S323041700–1920 [925–1050]rapid cooling in air or water
S325061870–2050 [1020–1120]rapid cooling in air or water
S325201975–2050 [1080–1120]rapid cooling in air or water
S325501900 [1040] minrapid cooling in air or water
S327071975–2050 [1080–1120]rapid cooling in air or water
S327501880–2060 [1025–1125]rapid cooling in air or water
S327601960–2085 [1070–1140]rapid cooling in air or water
S328081920–2100 [1050–1150]rapid cooling in air or water
S329001700–1750 [925–955]rapid cooling in air or water
S329061870–2100 [1020–1150]rapid cooling in air or water
S329501820–1880 [990–1025]air cool
S332071905–2085 [1040–1140]rapid cooling in water
S392741920–2060 [1025–1125]rapid cooling in air or water
S392771975–2155 [1080–1180]rapid cooling in air or water
S820111850–2050 [1010–1120]rapid cooling in air or water
S824411830 [1000] minrapid cooling in air or water

ASTM A789 Stainless Steel Tubing Tolerances

Outside
Diameter, in.
[mm]
OD Tolerance,
in. [mm]
Average Wall
in Wall Thickness,%
Minimum Wall
in Wall Thickness,
%, Over
Minimum Wall
in Wall Thickness,
%, Under
Cut Length, in.
[mm], Over
Cut Length, in.
[mm], Under
Thin Walled
Tubes
Up to 1⁄2 [12.7], excl±0.005 [0.13]±153001⁄8 [3]0
1⁄2 to 11⁄2 [12.7 to 38.1], excl±0.005 [0.13]±102001⁄8 [3]0less than 0.065 in. [1.6 mm] specified
11⁄2 to 31⁄2 [38.1 to 88.9], excl±0.010 [0.25]±102003⁄16 [5]0less than 0.095 in. [2.4 mm] specified
31⁄2 to 51⁄2 [88.9 to 139.7], excl±0.015 [0.38]±102003⁄16 [5]0less than 0.150 in. [3.8 mm] specified
51⁄2 to 8 [139.7 to 203.2], incl±0.030 [0.76]±102003⁄16 [5]0less than 0.150 in. [3.8 mm] specified
ASTM A789 UNS S31803 S32750 S32760 Duplex Stainless Steel Tubing