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SA213 TP321 TP321H Stainless Steel Tubes ASTM A213 321 SS Seamless Pipe

                   

321 Stainless Steel Tube 321H Stainless Steel Tube
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Guanyu Tube is TP321 Seamless Tubing Manufacturer. ASME SA213 TP321, ASTM A213 TP321 Stainless Steel Tubing Supplier, ASTM A213 TP321H Stainless Steel Tube Supplier,UNS S32100 EN 10216-5 1.4541 Stainless Steel Seamless Tubes, ASTM A312 SA312 TP321 Stainless Steel SMLS Pipe Supplier, 321 SS Tube Manufacturer. 321 Stainless Steel Tubes manufacturer. We Can Manufacturing both Seamless and Welded, OD Range 6 – 530mm Thickness range 0.5 – 30mm, Maximum Length in 25000mm. Please send your inquiry to us for more details. We have a large quanity of 321 Stainless Steel Tubes and Pipes Stock in China to support urgent projects.

Compared to TP304/304H, TP321 is superior for applications involving sustained high temperatures or welding where IGC is a concern. Compared to TP347 (niobium-stabilized), it offers comparable stabilization and is often chosen based on specific fabricability or cost considerations.

Guanyu SA213 TP321 TP321H Stainless Steel Tubes Advantage

  • 1. Super high cost performance.
  • 2. Stable and reliable quality.
  • 3. Specializing in the production of stainless steel tubes for heat exchangers. Professional because of focus.
  • 4. Can produce ultra-long stainless steel seamless tubes. Maximum Length is 60000mm.
  • 5. Fast delivery time. We have 22 sets cold rolling mills and 5 sets cold drawing machines to ensure rapid completion of production and delivery.
  • 6. Clean internal and external surfaces of stainless steel tubes.
  • 7. Excellent straightness. For customers with special requirements, we will add a straightening step before shipping.
  • Resistance to Intergranular Corrosion (IGC): The primary advantage. Titanium stabilization prevents sensitization (chromium carbide precipitation at grain boundaries) during welding or high-temperature exposure, making it ideal for as-welded or high-temperature applications.
  • Excellent High-Temperature Strength & Creep Resistance: Maintains structural integrity under high thermal stress and pressure, suitable for superheaters and heat exchangers.
  • Good Oxidation Resistance: Forms a stable, protective oxide layer at high temperatures.
  • Weldability: Good weldability without post-weld heat treatment for most applications, thanks to stabilization. However, proper welding procedures are still crucial.

TP321 Stainless Steel Tubes Properties and Character

  1. Stabilized Composition: The addition of titanium (min. 5x(C+N), typically) prevents chromium carbide formation at high temperatures (425-860°C).
  2. High-Temperature Performance: Excellent strength and oxidation resistance at elevated temperatures (up to ~815°C for intermittent, ~870°C for continuous service).
  3. Austenitic Structure: Provides good ductility, toughness, and formability.
  4. Corrosion Resistance: Excellent general corrosion resistance, particularly against intergranular corrosion after exposure to high temperatures.

ASME SA 213 TP321 TP321H Stainless Steel Tube Chemical Composition

GradeTP321TP321HEN 10216-5 1.4541
UNS DesignationS32100S32109
Carbon (C) Max.0.080.04–0.100.08
Manganese (Mn) Max.2.002.002.00
Phosphorous (P) Max.0.0450.0450.040
Sulphur (S) Max.0.030.030.015
Silicon (Si) Max.1.001.001.00
Chromium (Cr)17.0–20.017.0–20.017.0-19.0
Nickel (Ni)9.0–12.09.0–12.09.0–12.0
Molybdenum (Mo)——
Nitrogen (N)––
Iron (Fe)Bal.Bal.Bal.
Other ElementsTi=5(C+N) to 0.70%Ti=4(C+N) to 0.70%Ti=5(C+N) to 0.70%

ASTM A213 321 Stainless Steel Tubes Mechanical Properties

Tensile StrengthYield Strength
AlloyUNSSpecMPaksiMPaksiElongation in 2 inches (min.) %Grain Size 
Req.		Harndess
HBW max		Hardness
HV
max
321S32100ASME SA213515752053035—192200
321HS32109ASME SA2135157520530357 or coarser192200

TP321 TP321H Stainless Steel Physical Properties

AlloyUNSSpecDensity
kg/dm³		Modulus of Elasticity (x106 psi)Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)Thermal Conductivity (BTU-in/ft2-h-°F)
321S32100—7.9329.09.2—
321HS32109—7.9329.09.2—
Weight calculation coefficient: 0.02491

TP321 Stainless Steel Standard Specifications

AlloyUNS DesignationWerkstoff NR.Specifications*
321S32100EN 10216 – 5 1.4541A269, A249 / SA249, A312 / ASME SA312, A213 / SA213
321HS32109EN 10216 – 5 1.4878ASTM A269, A249 / SA249, A312 / SA312, A213/ ASME SA 213
Standard Specification:EN 10216-5, DIN 17456, DIN 17458, DIN 2462, DIN 17455
GB/T14975, T14976, T13296, GB5310
ASTM A213, A269, A312, A511, A789, A790, A928, A999, A1016, ASTM B161, ASTM B163, ASTM B165, ASTM B167, ASTM B338, ASTM B407, ASTM B423, ASTM B444,ASTM B619, ASTM B622, ASTM B626, ASTM B668, ASTM B677, ASTM B829
JIS G3459, JIS G3463, JIS G3446, JIS G3447, JIS G3448, JIS G3468
GOST 9940, GOST 9941

ASTM A213 TP321 Stainless Steel Pipe Heat Treatment

321 Stainless Steel Tube Recommended Maximum Service Temperature (Oxidising Conditions)

Continuous Service 950 °C 
Intermittent Service  870 °C

1.    Annealing Heat  from 1050°C to 1150°C  and cool in air.  This ensures maximum ductility of the steel. 
2.    Stress Relieving 321 can be stress-relief annealed within the sensitization temperature range 
       450-800°C  without carbide precipitation occurring, thus avoiding the possibility of intergranular corrosion. 

321 321H Stainless Steel Stabilising Heat Treatment

321 or 321H usually required stabilising heat treatment. Heat Treatment to 870-900°C and hold for 4 hour per 25mm of thickness and air cool. Stabilisation is recommended for most severe service conditions (above 425°C) and particularly for material annealed at the upper side of the annealing temperature range.

SA213 TP321 TP321H Stainless Steel Tube Typical Applications

•        Stainless Steel Reheater Tubes and Superheater Tubes for Boiler

•         Aircraft exhaust manifolds

•         Expansion joints

•         Bellows

•         Furnace parts

•         Heating element tubing

•         Heat Exchanger Tube

•         Woven or welded screens for high temperature mineral processing

•         Spiral Welded tube for burner pipes and flues

SA213 TP321 Stainless Steel Welding

Excellent weldability by all standard fusion methods, both with and without filler metals. AS 1554.6 pre-qualifies welding of 321 and 347 with Grade 347 rods or electrodes; high silicon version of 347 is also pre-qualified for welding of 321.321 Stainless Steel Tube and Pipe Applications

ASME SA213 TP321 Seamless Tubing Size

Size:1/4″ × 0.035″
Size:3/8″ × 0.035″ 
Size:1/2″ × 0.035″
Size:5/8″ × 0.035″
Size:3/4″ × 0.035″
Size:1″ × 0.035″
Size:5/16″ × 0.035″
Size:1/4″ × 0.049″
Size:3/8″ × 0.049″
Size:1/2″ × 0.049″
Size:5/8″ × 0.049″
Size:3/4″ × 0.049″
Size:1″ × 0.049″ 
Size:1/4″ × 0.065″ 
Size:3/8″ × 0.065″ 
Size:1/2″ × 0.065″ 
Size:5/8″ × 0.065″
Size:3/4″ × 0.065″
Size:1″ × 0.065″
Size:1″ × 0.120″ 

ASTM A312 TP321 Stainless Steel Pipe Size and Weight

NPSDNOD
inch		OD
mm		SCH5S
mm		SCH10S
mm		SCH10
mm		SCH20
mm		SCH30
mm		STD
mm		SCH40S
mm		SCH40
mm		SCH60
mm		XS
mm		SCH80S
mm		SCH80
mm		SCH100
mm		SCH120
mm		SCH140
mm		SCH160
mm		XXS
mm
  1/8″60.40510.3　1.241.24　1.451.731.731.73　2.412.412.41　　　　　
kgs/m　　　　0.2800.280 0.3200.3690.3690.369 0.4740.4740.474　　　　　
  1/4″80.54013.7　1.651.65　1.852.242.242.24　3.023.023.02　　　　　
kgs/m　　　　0.4950.495 0.5460.6390.6390.639 0.8030.8030.803　　　　　
  3/8″100.67517.1　1.651.65　1.852.312.312.31　3.203.203.20　　　　　
kgs/m　　　　0.6350.635 0.7030.8510.8510.851 1.1081.1081.108　　　　　
  1/2″150.84021.31.652.112.11　2.412.772.772.77　3.733.733.73　　　4.787.47
kgs/m　　　0.8081.0091.009 1.1341.2791.2791.279 1.6331.6331.633　　　1.9672.573
  3/4″201.05026.71.652.112.11　2.412.872.872.87　3.913.913.91　　　5.567.82
kgs/m　　　1.0301.2921.292 1.4581.7041.7041.704 2.2202.2202.220　　　2.9283.678
1″251.31533.41.652.772.77　2.903.383.383.38　4.554.554.55　　　6.359.09
kgs/m　　　1.3052.1132.113 2.2032.5282.5282.528 3.273.273.27　　　4.2795.505
1 1/4″32   1.66042.21.652.772.77　2.973.563.563.56　4.854.854.85　　　6.359.70
kgs/m　　　1.6672.7212.721 2.9023.4273.4273.427 4.5124.5124.512　　　5.6717.853
1 1/2″40   1.90048.31.652.772.77　3.183.683.683.68　5.085.085.08　　　7.1410.15
kgs/m　　　1.9173.1423.142 3.5744.0904.0904.090 5.4695.4695.469　　　7.3219.646
2″502.37560.31.652.772.77　3.183.913.913.91　5.545.545.54　　　8.7411.07
kgs/m　　　2.4113.9703.970 4.5255.4925.4925.492 7.5577.5577.557　　　11.22513.575
2 1/2″65   2.875732.113.053.05　4.785.165.165.16　7.017.017.01　　　9.5314.02
kgs/m　　　3.7265.3145.314 8.1238.7208.7208.720 11.52311.52311.523　　　15.06720.598
3″803.50088.92.113.053.05　4.785.495.495.49　7.627.627.62　　　11.1315.24
kgs/m　　　4.5626.5226.522 10.01611.40711.40711.407 15.42815.42815.428　　　21.56227.963
3 1/2″90   4.000101.62.113.053.05　4.785.745.745.74　8.088.088.08　　　　　
kgs/m　　　5.2297.4877.487 11.52813.70613.70613.706 18.82318.82318.823　　　  
4″1004.500114.32.113.053.05　4.786.026.026.02　8.568.568.56　11.13　13.4917.12
kgs/m　　　5.8978.4528.452 13.04116.23716.23716.237 22.54722.54722.547　28.604　33.87641.443
5″1255.563141.32.773.403.40　　6.556.556.55　9.539.539.53　12.70　15.8819.05
kgs/m　　　9.55911.67911.679  21.98621.98621.986 31.28131.28131.281　40.684　49.61258.012
6″1606.625168.32.773.403.40　　7.117.117.11　10.9710.9710.97　14.27　18.2621.95
kgs/m　　　11.42213.96613.966  28.54828.54828.548 42.99242.99242.992　54.752　68.24780.020
8″2008.625219.12.773.763.766.357.048.188.188.1810.3112.7012.7012.7015.0918.2620.6223.0122.23
kgs/m　　　14.92720.16920.16933.65237.18842.97842.97842.97853.62265.29665.29665.29676.68691.353101.948112.395109.017
10″25010.750273.03.404.194.196.357.809.279.279.2712.7012.7012.7015.0918.2621.4425.4028.5825.40
kgs/m　　　22.83428.05628.05642.17851.52860.89960.89960.89982.34882.34882.34896.946115.870134.351156.660174.009156.660
12″30012.750323.83.964.574.576.358.389.539.5310.3114.2712.7012.7017.4821.4425.4028.5833.3225.40
kgs/m　　　31.55036.34136.34150.21465.84374.60574.60580.511110.02798.41998.419133.380161.482188.802210.175241.099188.802
14″35014.000355.63.964.786.357.929.539.539.5311.1315.0912.7012.7019.0523.8327.7931.7535.71　
kgs/m　　　34.68741.77255.24468.59382.15482.15482.15495.504127.995108.479108.479159.705196.940226.926256.131284.554 
16″40016.000406.44.194.786.357.929.539.539.5312.7016.6612.7012.7021.4426.1930.9636.5340.49　
kgs/m　　　41.98047.82163.27978.61594.21494.21494.214124.550161.742124.550124.550205.596248.046289.544336.568369.059　
18″45018.000457.24.194.786.357.9211.139.539.5314.2719.0512.7012.7023.8329.3634.9339.6745.24　
kgs/m　　　47.28253.87071.31588.637123.672106.273106.273157.446207.918140.621140.621257.251312.904367.420412.595464.249　
20″50020.0005084.785.546.359.5312.709.539.5315.0920.6212.7012.7026.1932.5438.1044.4550.01　
kgs/m　　　59.91869.34079.350118.333156.692118.333118.333185.281250.340156.692156.692314.329385.394445.968513.266570.541　
22″55022.000558.84.785.546.359.5312.709.53　　22.2312.70　28.5834.9341.2847.6353.98　
kgs/m　　　65.96776.35187.386130.392172.763130.392  297.125172.763 377.478455.823532.158606.484678.802　
24″60024.000609.65.546.356.359.5314.279.539.5317.4824.6112.7012.7030.9638.8946.0252.3759.54　
kgs/m　　　83.36195.42195.421142.452211.619142.452142.452257.825358.619188.833188.833446.255552.875646.065726.927815.817　
26″65026.000660.4　　7.9212.70　9.53　　　12.70　　　　　　　
kgs/m　　　　　128.726204.904 154.512　　　204.904　　　　　　　
28″70028.000711.2　　7.9212.7015.889.53　　　12.70　　　　　　　
kgs/m　　　　　138.748220.975275.048166.571　　　220.975　　　　　　　
30″75030.0007626.357.927.9212.7015.889.53　　　12.70　　　　　　　
kgs/m　　　119.528148.770148.770237.046295.143178.631　　　237.046　　　　　　　
32″80032.000812.8　　7.9212.7015.889.53　17.48　12.70　　　　　　　
kgs/m　　　　　158.793253.117315.238190.690　346.304　253.117　　　　　　　
34″85034.000863.6　　7.9212.7015.889.53　17.48　12.70　　　　　　　
kgs/m　　　　　168.815269.188335.333202.750　368.423　269.188　　　　　　　
36″90036.000914.4　　7.9212.7015.889.53　19.05　12.70　　　　　　　
kgs/m　　　　　178.837285.259355.428214.809　424.875　285.259　　　　　　　
38″95038.000965.2　　　　　9.53　　　12.70　　　　　　　
kgs/m　　　　　　　　226.869　　　301.330　　　　　　　
40″100040.0001016　　　　　9.53　　　12.70　　　　　　　
kgs/m　　　　　　　　238.928　　　317.401　　　　　　　
42″105042.0001066.8　　　　　9.53　　　12.70　　　　　　　
kgs/m   　　　　　250.988　　　333.472　　　　　　　

Maximum internal pressure of TP321 Stainless Steel Tube

American standard for Process piping (ASME B31.3 : 2018)

Maximum internal pressure of ASTM A213 A269 TP321 Stainless Steel Tubing Size: OD 15.88mm WT 1.245mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321205205205205198187179t<=3/8″ A 312 and A 269 tube

Maximum internal pressure of ASTM A312 ASTM A269 321 Stainless Steel Tubing Size: OD 15.88mm WT 1.651mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321278278278278268255243t<=3/8″ A 312 and ASTM A269 tube

Maximum internal pressure of ASTM A312 A269 321 Stainless Steel Tube Size: OD 19.05mm WT 1.651mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321229229229229221209200t<=3/8″ A 312 and A 269 tube

Maximum internal pressure of ASTM A312 A269 TP321 Stainless Steel Tubing Size: OD 19.05mm WT 2.11mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321298298298298288273261t<=3/8″ A 312 and A 269 tube

Maximum internal pressure of ASTM A312 A269 321 Stainless Steel Tubing Size: OD 25.4mm WT 1.651mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321169169169169163154148t<=3/8″ A 312 and A 269 tube

Maximum internal pressure of ASTM A312 A269 321 Stainless Steel Tubing Size: OD 25.4mm WT 2.11mm Wall Thickness Tolerance: ± 10%

GradePressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Pressure
bar		Remark
 100°F200°F300°F400°F500°F600°F700°F–
TP321219219219219211200191t<=3/8″ A 312 and A 269 tube

ASTM A213 TP321 TP321H Stainless Steel Pipe Marking and Packing

SA213 TP321
321 Stainless Steel Tubes
321 Stainless Steel Pipe
Intergranular-Corrosion-Test
Instergranular Corrosion Test

SA213 TP321 Stainless Steel Tube Export Record

Export ASME SA213 TP321 Stainless Steel Seamless Tubes finished in Pickling Annealing. Size with Outside Diameter in 25.4mm, Wall Thickness in 2.77mm Length in 12539 – 13935mm. Total in 24915KGS.

General Properties
Chemical Composition
Resistance to Corrosion
Physical Properties
Mechanical Properties
Heat Treatment
Fabrication
Elevated Temperature Oxidation Resistance
Oxidation Behavior of Type 321 Stainless Steel Tube
321 S32100 Chemical Composition Comparison Table

Difference Between 321 and 347 Stainless Steel

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