描述

ASME SA213 TP321 Stainless Steel Tubes Properties and Character

TP321 is a stabilized stainless steel which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperature in the chromium carbide precipitation range from 800 °F to 1500°F (427°C to 816°C). Alloy 321 stainless steel tubing is stabilized against chromium carbide formation by the addition oftitanium.

TP321 TP321H Stainless Steel is a titanium-stabilised version of TP304, used in particular applications within the sensitizing temperature range. Its resistance to sensitization, coupled with its higher strength at high temperature makes it suitable in applications where 304 will become sensitized, or where TP304L has insufficient hot strength. It is not subject to weld decay intergranular corrosion when exposed to mildly corrosive environments. However, welded 321 must never be used in highly oxidising environments as it is liable to ‘Knife-line’ attack. However, 321 is a much better option in operating temperature environments in excess of 500° C and therefore has its own merits. Alloy 321 stainless steel tube is also advantageous for high temperature service because of its good mechanical properties. Alloy 321 stainless steel offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L also be considered for exposure where sensitization and intergranular corrosion are concern.

TP321 TP321H stainless steel is basically from 304 stainless steel. They different by a very very small addition of Titanium. The real difference is their carbon content. The higher the carbon content the greater the yield strength. 321 stainless steel has advantages in a high temperature environment due to its excellent mechanical properties. Compared with 304 alloy, 321 stainless steel has better ductility and resistance to stress fracture. In addition, 304L can also be used for anti-sensitization and intergranular corrosion.

Grade TP304L is more readily available in most product forms, and so is generally used in preference to 321 if the requirement is simply for resistance to intergranular corrosion after welding. However 304L has lower hot strength than 321 and so is not the best choice if the requirement is resistance to an operating environment over about 500°C.

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 TP321 Stainless Steel Tubes Mechanical Properties

Tensile StrengthYield Strength
AlloyUNSSpecMPaksiMPaksiElongation in 2 inches (min.) %Grain Size
Req.
Harndess
HBW max
Hardness
HV
max
321S32100ASME SA213515752053035192200
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)
321S321007.9329.09.2
321HS321097.9329.09.2

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 10216-5DIN 17456, DIN 17458, DIN 2462, DIN 17455
GB/T14975, T14976, T13296, GB5310
ASTM A213A269A312A511A789A790A928, 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 Pipe Typical Properties in the Annealed Condition

The properties quoted in this publication are typical of mill products. Unless otherwise indicated they should not be regarded as guaranteed minimum values for specification purposes.

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

Continuous Service 950 °C
Intermittent Service  870 °C

1.    Annealing Heat  from 1050 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.
3.     Hot working
Initial forging and pressing temperature: 1150  – 1250 °C
Finishing temperature: 950 °C

Solution Treatment (Annealing) – heat to 950-1120°C and cool rapidly for maximum corrosion resistance.

Stabilising – heat to 870-900°C for 1 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.

Stress Relief – Heat to 700°C for 1 to 2 hours and air cool.

These grades cannot be hardened by thermal treatment.

ASTM A269 TP321 Stainless Steel Tubing Corrosion Resistance

Equivalent to Grade 304 in the annealed condition, and superior if a weldment in these grades has not been post-weld annealed or if the application involves service in the 425-900°C range. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 60°C. Considered resistant to potable water with up to about 200mg/L chlorides at ambient temperatures, reducing to about 150mg/L at 60°C. 321 Stainless Steel Tube Heat Resistance

Good oxidation resistance in intermittent service to 900°C and in continuous service to 925°C. These grades perform well in the 425-900°C range, and particularly where subsequent aqueous corrosive conditions are present. 321H has higher hot strength, and is particularly suitable for high temperature structural applications. 321 Stainless Steel Pipe Heat Treatment

ASTM A213 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

•         Woven or welded screens for high temperature mineral processing

•         Spiral Welded tube for burner pipes and flues

ASTM A312 TP321 Stainless Steel Pipe 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
  1/860.40510.31.241.241.451.731.731.732.412.412.41
kgs/m0.2800.2800.3200.3690.3690.3690.4740.4740.474
  1/480.54013.71.651.651.852.242.242.243.023.023.02
kgs/m0.4950.4950.5460.6390.6390.6390.8030.8030.803
  3/8100.67517.11.651.651.852.312.312.313.203.203.20
kgs/m0.6350.6350.7030.8510.8510.8511.1081.1081.108
  1/2150.84021.31.652.112.112.412.772.772.773.733.733.734.787.47
kgs/m0.8081.0091.0091.1341.2791.2791.2791.6331.6331.6331.9672.573
  3/4201.05026.71.652.112.112.412.872.872.873.913.913.915.567.82
kgs/m1.0301.2921.2921.4581.7041.7041.7042.2202.2202.2202.9283.678
1251.31533.41.652.772.772.903.383.383.384.554.554.556.359.09
kgs/m1.3052.1132.1132.2032.5282.5282.5283.273.273.274.2795.505
1 1/4321.66042.21.652.772.772.973.563.563.564.854.854.856.359.70
kgs/m1.6672.7212.7212.9023.4273.4273.4274.5124.5124.5125.6717.853
1 1/2401.90048.31.652.772.773.183.683.683.685.085.085.087.1410.15
kgs/m1.9173.1423.1423.5744.0904.0904.0905.4695.4695.4697.3219.646
2502.37560.31.652.772.773.183.913.913.915.545.545.548.7411.07
kgs/m2.4113.9703.9704.5255.4925.4925.4927.5577.5577.55711.22513.575
2 1/2652.875732.113.053.054.785.165.165.167.017.017.019.5314.02
kgs/m3.7265.3145.3148.1238.7208.7208.72011.52311.52311.52315.06720.598
3803.50088.92.113.053.054.785.495.495.497.627.627.6211.1315.24
kgs/m4.5626.5226.52210.01611.40711.40711.40715.42815.42815.42821.56227.963
3 1/2904.000101.62.113.053.054.785.745.745.748.088.088.08
kgs/m5.2297.4877.48711.52813.70613.70613.70618.82318.82318.823
41004.500114.32.113.053.054.786.026.026.028.568.568.5611.1313.4917.12
kgs/m5.8978.4528.45213.04116.23716.23716.23722.54722.54722.54728.60433.87641.443
51255.563141.32.773.403.406.556.556.559.539.539.5312.7015.8819.05
kgs/m9.55911.67911.67921.98621.98621.98631.28131.28131.28140.68449.61258.012
61606.625168.32.773.403.407.117.117.1110.9710.9710.9714.2718.2621.95
kgs/m11.42213.96613.96628.54828.54828.54842.99242.99242.99254.75268.24780.020
82008.625219.12.773.763.766.357.048.188.188.1810.3112.7012.7012.7015.0918.2620.6223.0122.23
kgs/m14.92720.16920.16933.65237.18842.97842.97842.97853.62265.29665.29665.29676.68691.353101.948112.395109.017
1025010.750273.03.404.194.196.357.809.279.279.2712.7012.7012.7015.0918.2621.4425.4028.5825.40
kgs/m22.83428.05628.05642.17851.52860.89960.89960.89982.34882.34882.34896.946115.870134.351156.660174.009156.660
1230012.750323.83.964.574.576.358.389.539.5310.3114.2712.7012.7017.4821.4425.4028.5833.3225.40
kgs/m31.55036.34136.34150.21465.84374.60574.60580.511110.02798.41998.419133.380161.482188.802210.175241.099188.802
1435014.000355.63.964.786.357.929.539.539.5311.1315.0912.7012.7019.0523.8327.7931.7535.71
kgs/m34.68741.77255.24468.59382.15482.15482.15495.504127.995108.479108.479159.705196.940226.926256.131284.554
1640016.000406.44.194.786.357.929.539.539.5312.7016.6612.7012.7021.4426.1930.9636.5340.49
kgs/m41.98047.82163.27978.61594.21494.21494.214124.550161.742124.550124.550205.596248.046289.544336.568369.059
1845018.000457.24.194.786.357.9211.139.539.5314.2719.0512.7012.7023.8329.3634.9339.6745.24
kgs/m47.28253.87071.31588.637123.672106.273106.273157.446207.918140.621140.621257.251312.904367.420412.595464.249
2050020.0005084.785.546.359.5312.709.539.5315.0920.6212.7012.7026.1932.5438.1044.4550.01
kgs/m59.91869.34079.350118.333156.692118.333118.333185.281250.340156.692156.692314.329385.394445.968513.266570.541
2255022.000558.84.785.546.359.5312.709.5322.2312.7028.5834.9341.2847.6353.98
kgs/m65.96776.35187.386130.392172.763130.392297.125172.763377.478455.823532.158606.484678.802
2460024.000609.65.546.356.359.5314.279.539.5317.4824.6112.7012.7030.9638.8946.0252.3759.54
kgs/m83.36195.42195.421142.452211.619142.452142.452257.825358.619188.833188.833446.255552.875646.065726.927815.817
2665026.000660.47.9212.709.5312.70
kgs/m128.726204.904154.512204.904
2870028.000711.27.9212.7015.889.5312.70
kgs/m138.748220.975275.048166.571220.975
3075030.0007626.357.927.9212.7015.889.5312.70
kgs/m119.528148.770148.770237.046295.143178.631237.046
3280032.000812.87.9212.7015.889.5317.4812.70
kgs/m158.793253.117315.238190.690346.304253.117
3485034.000863.67.9212.7015.889.5317.4812.70
kgs/m168.815269.188335.333202.750368.423269.188
3690036.000914.47.9212.7015.889.5319.0512.70
kgs/m178.837285.259355.428214.809424.875285.259
3895038.000965.29.5312.70
kgs/m226.869301.330
40100040.00010169.5312.70
kgs/m238.928317.401
42105042.0001066.89.5312.70
kgs/m250.988333.472

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
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Pressure
bar
Pressure
bar
Pressure
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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

321 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.

TP321 Stainless Steel Tube Export Countries

MIDDLE EAST
Saudi Arabia
Iran
Iraq
UAE
Qatar
Bahrain
Oman
Kuwait
Turkey
Yemen
Syria
Jordan
Cyprus
AFRICA
Nigeria
Algeria
Angola
South Africa
Libya
Egypt
Sudan
Equatorial Guinea
The Republic Of Congo
GabonNORTH AMERICA
USA
Canada
Mexico
Panama
Costa Rica
Puerto Rica
Trinidad And Tobago
Jamaica
Bahamas
Denmark
EUROPE
Russia
Norway
Germany
France
Italy
UK
Spain
Ukraine
Netherland
Belgium
Greece
Czech Republic
Portugal
Hungary
Albania
Austria
Switzerland
Slovakia
Finland
Ireland
Croatia
Slovenia
Malta
ASIA
India
Singapore
Malaysia
Indonesia
Thailand
Vietnam
South Korea
Japan
Sri Lanka
Maldives
Bangladesh
Mayanmar
Taiwan
Cambodia
SOUTH AMERICA
Argentina
Bolivia
Brazil
Chile
Venezuela
Colombia
Ecuador
Guyana
Paraguay
Uruguay

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