Description

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

Grade TP321 TP321H EN 10216-5 1.4541
UNS Designation S32100 S32109
Carbon (C) Max. 0.08 0.04–0.10 0.08
Manganese (Mn) Max. 2.00 2.00 2.00
Phosphorous (P) Max. 0.045 0.045 0.040
Sulphur (S) Max. 0.03 0.03 0.015
Silicon (Si) Max. 1.00 1.00 1.00
Chromium (Cr) 17.0–20.0 17.0–20.0 17.0-19.0
Nickel (Ni) 9.0–12.0 9.0–12.0 9.0–12.0
Molybdenum (Mo) — —
Nitrogen (N) – –
Iron (Fe) Bal. Bal. Bal.
Other Elements Ti=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 Strength Yield Strength
Alloy UNS Spec MPa ksi MPa ksi Elongation in 2 inches (min.) % Grain Size
Req.		 Harndess
HBW max		 Hardness
HV
max
321 S32100 ASME SA213 515 75 205 30 35 — 192 200
321H S32109 ASME SA213 515 75 205 30 35 7 or coarser 192 200

TP321 TP321H Stainless Steel Physical Properties

Alloy UNS Spec Density
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)
321 S32100 — 7.93 29.0 9.2 —
321H S32109 — 7.93 29.0 9.2 —

TP321 Stainless Steel Standard Specifications

Alloy UNS Designation Werkstoff NR. Specifications*
321 S32100 EN 10216 – 5 1.4541 A269, A249 / SA249, A312 / ASME SA312, A213 / SA213
321H S32109 EN 10216 – 5 1.4878 ASTM 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 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

NPS DN OD
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 6 0.405 10.3 1.24 1.24 1.45 1.73 1.73 1.73 2.41 2.41 2.41
kgs/m 0.280 0.280 0.320 0.369 0.369 0.369 0.474 0.474 0.474
  1/4 8 0.540 13.7 1.65 1.65 1.85 2.24 2.24 2.24 3.02 3.02 3.02
kgs/m 0.495 0.495 0.546 0.639 0.639 0.639 0.803 0.803 0.803
  3/8 10 0.675 17.1 1.65 1.65 1.85 2.31 2.31 2.31 3.20 3.20 3.20
kgs/m 0.635 0.635 0.703 0.851 0.851 0.851 1.108 1.108 1.108
  1/2 15 0.840 21.3 1.65 2.11 2.11 2.41 2.77 2.77 2.77 3.73 3.73 3.73 4.78 7.47
kgs/m 0.808 1.009 1.009 1.134 1.279 1.279 1.279 1.633 1.633 1.633 1.967 2.573
  3/4 20 1.050 26.7 1.65 2.11 2.11 2.41 2.87 2.87 2.87 3.91 3.91 3.91 5.56 7.82
kgs/m 1.030 1.292 1.292 1.458 1.704 1.704 1.704 2.220 2.220 2.220 2.928 3.678
1 25 1.315 33.4 1.65 2.77 2.77 2.90 3.38 3.38 3.38 4.55 4.55 4.55 6.35 9.09
kgs/m 1.305 2.113 2.113 2.203 2.528 2.528 2.528 3.27 3.27 3.27 4.279 5.505
1 1/4 32 1.660 42.2 1.65 2.77 2.77 2.97 3.56 3.56 3.56 4.85 4.85 4.85 6.35 9.70
kgs/m 1.667 2.721 2.721 2.902 3.427 3.427 3.427 4.512 4.512 4.512 5.671 7.853
1 1/2 40 1.900 48.3 1.65 2.77 2.77 3.18 3.68 3.68 3.68 5.08 5.08 5.08 7.14 10.15
kgs/m 1.917 3.142 3.142 3.574 4.090 4.090 4.090 5.469 5.469 5.469 7.321 9.646
2 50 2.375 60.3 1.65 2.77 2.77 3.18 3.91 3.91 3.91 5.54 5.54 5.54 8.74 11.07
kgs/m 2.411 3.970 3.970 4.525 5.492 5.492 5.492 7.557 7.557 7.557 11.225 13.575
2 1/2 65 2.875 73 2.11 3.05 3.05 4.78 5.16 5.16 5.16 7.01 7.01 7.01 9.53 14.02
kgs/m 3.726 5.314 5.314 8.123 8.720 8.720 8.720 11.523 11.523 11.523 15.067 20.598
3 80 3.500 88.9 2.11 3.05 3.05 4.78 5.49 5.49 5.49 7.62 7.62 7.62 11.13 15.24
kgs/m 4.562 6.522 6.522 10.016 11.407 11.407 11.407 15.428 15.428 15.428 21.562 27.963
3 1/2 90 4.000 101.6 2.11 3.05 3.05 4.78 5.74 5.74 5.74 8.08 8.08 8.08
kgs/m 5.229 7.487 7.487 11.528 13.706 13.706 13.706 18.823 18.823 18.823
4 100 4.500 114.3 2.11 3.05 3.05 4.78 6.02 6.02 6.02 8.56 8.56 8.56 11.13 13.49 17.12
kgs/m 5.897 8.452 8.452 13.041 16.237 16.237 16.237 22.547 22.547 22.547 28.604 33.876 41.443
5 125 5.563 141.3 2.77 3.40 3.40 6.55 6.55 6.55 9.53 9.53 9.53 12.70 15.88 19.05
kgs/m 9.559 11.679 11.679 21.986 21.986 21.986 31.281 31.281 31.281 40.684 49.612 58.012
6 160 6.625 168.3 2.77 3.40 3.40 7.11 7.11 7.11 10.97 10.97 10.97 14.27 18.26 21.95
kgs/m 11.422 13.966 13.966 28.548 28.548 28.548 42.992 42.992 42.992 54.752 68.247 80.020
8 200 8.625 219.1 2.77 3.76 3.76 6.35 7.04 8.18 8.18 8.18 10.31 12.70 12.70 12.70 15.09 18.26 20.62 23.01 22.23
kgs/m 14.927 20.169 20.169 33.652 37.188 42.978 42.978 42.978 53.622 65.296 65.296 65.296 76.686 91.353 101.948 112.395 109.017
10 250 10.750 273.0 3.40 4.19 4.19 6.35 7.80 9.27 9.27 9.27 12.70 12.70 12.70 15.09 18.26 21.44 25.40 28.58 25.40
kgs/m 22.834 28.056 28.056 42.178 51.528 60.899 60.899 60.899 82.348 82.348 82.348 96.946 115.870 134.351 156.660 174.009 156.660
12 300 12.750 323.8 3.96 4.57 4.57 6.35 8.38 9.53 9.53 10.31 14.27 12.70 12.70 17.48 21.44 25.40 28.58 33.32 25.40
kgs/m 31.550 36.341 36.341 50.214 65.843 74.605 74.605 80.511 110.027 98.419 98.419 133.380 161.482 188.802 210.175 241.099 188.802
14 350 14.000 355.6 3.96 4.78 6.35 7.92 9.53 9.53 9.53 11.13 15.09 12.70 12.70 19.05 23.83 27.79 31.75 35.71
kgs/m 34.687 41.772 55.244 68.593 82.154 82.154 82.154 95.504 127.995 108.479 108.479 159.705 196.940 226.926 256.131 284.554
16 400 16.000 406.4 4.19 4.78 6.35 7.92 9.53 9.53 9.53 12.70 16.66 12.70 12.70 21.44 26.19 30.96 36.53 40.49
kgs/m 41.980 47.821 63.279 78.615 94.214 94.214 94.214 124.550 161.742 124.550 124.550 205.596 248.046 289.544 336.568 369.059
18 450 18.000 457.2 4.19 4.78 6.35 7.92 11.13 9.53 9.53 14.27 19.05 12.70 12.70 23.83 29.36 34.93 39.67 45.24
kgs/m 47.282 53.870 71.315 88.637 123.672 106.273 106.273 157.446 207.918 140.621 140.621 257.251 312.904 367.420 412.595 464.249
20 500 20.000 508 4.78 5.54 6.35 9.53 12.70 9.53 9.53 15.09 20.62 12.70 12.70 26.19 32.54 38.10 44.45 50.01
kgs/m 59.918 69.340 79.350 118.333 156.692 118.333 118.333 185.281 250.340 156.692 156.692 314.329 385.394 445.968 513.266 570.541
22 550 22.000 558.8 4.78 5.54 6.35 9.53 12.70 9.53 22.23 12.70 28.58 34.93 41.28 47.63 53.98
kgs/m 65.967 76.351 87.386 130.392 172.763 130.392 297.125 172.763 377.478 455.823 532.158 606.484 678.802
24 600 24.000 609.6 5.54 6.35 6.35 9.53 14.27 9.53 9.53 17.48 24.61 12.70 12.70 30.96 38.89 46.02 52.37 59.54
kgs/m 83.361 95.421 95.421 142.452 211.619 142.452 142.452 257.825 358.619 188.833 188.833 446.255 552.875 646.065 726.927 815.817
26 650 26.000 660.4 7.92 12.70 9.53 12.70
kgs/m 128.726 204.904 154.512 204.904
28 700 28.000 711.2 7.92 12.70 15.88 9.53 12.70
kgs/m 138.748 220.975 275.048 166.571 220.975
30 750 30.000 762 6.35 7.92 7.92 12.70 15.88 9.53 12.70
kgs/m 119.528 148.770 148.770 237.046 295.143 178.631 237.046
32 800 32.000 812.8 7.92 12.70 15.88 9.53 17.48 12.70
kgs/m 158.793 253.117 315.238 190.690 346.304 253.117
34 850 34.000 863.6 7.92 12.70 15.88 9.53 17.48 12.70
kgs/m 168.815 269.188 335.333 202.750 368.423 269.188
36 900 36.000 914.4 7.92 12.70 15.88 9.53 19.05 12.70
kgs/m 178.837 285.259 355.428 214.809 424.875 285.259
38 950 38.000 965.2 9.53 12.70
kgs/m 226.869 301.330
40 1000 40.000 1016 9.53 12.70
kgs/m 238.928 317.401
42 1050 42.000 1066.8 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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 205 205 205 205 198 187 179 t<=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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 278 278 278 278 268 255 243 t<=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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 229 229 229 229 221 209 200 t<=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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 298 298 298 298 288 273 261 t<=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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 169 169 169 169 163 154 148 t<=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%

Grade Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Pressure
bar		 Remark
100°F 200°F 300°F 400°F 500°F 600°F 700°F –
TP321 219 219 219 219 211 200 191 t<=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