
Stainless Steel 321 Pipe
Supplier of Stainless Steel 321 Pipe in India, Refer Dimensions of 321H Seamless Tube, Manufacturer of ASTM A312 TP321 Welded Pipe, Schedule 40 SS 321H Round Tubing
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Stainless Steel 321 Pipe in Detail
Technical Data
Full Specifications
›Technical Data
Spec Table of Stainless Steel 321 Pipe
| ASTM / ASME Standards | ASTM A269 / ASME SA269 ASTM A312 / ASME SA312 |
|---|---|
| Pipe Form | Round, Square, Hollow, Rectangular, Hydraulic, Straight Pipes Etc. |
| Pipe/ Tube Length | Single Random, Double Random & Cut Length. |
| Pipe/ Tube Schedule | SCH5, SCH10, SCH40, STD, SCH80, SCH160 |
| Pipe Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| EFW Pipe size | 5.0 mm - 1219.2 mm |
| End | Plain End, Beveled End, Treaded. |
| Welded Tube Size | 6.35 mm OD To 152 mm OD |
| Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
| Marking | All Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.) |
| Material Test Certificates (MTC) | Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2 |
| Tubing wall thickness | 0.020" –0.220", (special wall thicknesses available) |
| Tube Length | Single Random, Double Random, Standard & Cut length |
| End | Plain End, Beveled End, Treaded |
| Marking | All tubes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.) |
| Tube Type | Seamless, ERW, EFW, Welded, Fabricated |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| Tube Form | Round, Coil, Square, Rectangular, Boiler, Hydraulic, Straight or ‘U’ bent Tubes, Hollow, LSAW Tubes Etc. |
| Application | Oil Tube, Gas Tube, Fluid Tube, Boiler and Heat exchanger |
Equivalent of SS 321/ 321H Tubing & Pipe
| col_1 | col_2 | col_3 | col_4 | col_5 |
|---|---|---|---|---|
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Check What We Supply in Africa & Europe
| col_1 | col_2 |
|---|---|
| ASTM A999 TP 321 Pipes | Philippines, Canada, Malaysia, Singapore |
| Austenitic Stainless Steel 321 Round Pipe | Taiwan, Los Alamos -Mexico, Malaysia, Philippines |
| SA358 GR.321H CL.1 Welded Pipe | Indonesia, Dammam -KSA, Belgium, Philippines, |
| SA 213 TP 321 Stainless Steel Exhaust Tubing | France, Europe, Qatar, Thailand |
| ASME SA 312 321H ERW Pipe | Saudi Arabia (KSA), Kuwait, South Africa, Brazil |
| W. Nr. 1.4541 Welded Pipe | Singapore, South Africa, Bahrain, |
| AISI 321H Heat Exhanger Tubes | Nigeria, Philippines, Australia, UK |
| UNS S32100 Boiler Tube | Hong Kong, Malaysia, UAE, Oman |
| ASME SA249 TP 321 Seamless Tubing | Iran, Italy, Chile, Singapore |
| Stainless Steel 321H Cold Drawn Pipes | Germany, Thailand, Czechia, Malaysia |
| AISI 321 stainless steel capillary tube | USA, Bangladesh, Malaysia, Finland |
| Heat Resistant 321H Stainless Steel Welded Tubing | Mexico, Egypt, Spain, UK |
| Inox 321 Exhaust Stainless Steel Pipe | UAE, Europe, United Kingdom -UK, Malaysia |
| 16 Gauge Sus 321H Stainless Steel Seamless Tube | Canada, Poland, UK, Ellington -United States |
| 321 Stainless Steel Welded Coiled heat exchanger Tube | Turkey, Norway, United Arab Emirates (UAE), Malaysia |
| 321H stainless steel hypodermic tubing | Japan, Malaysia, Romania, Europe |
| 15mm-101.6mm 321 stainless steel welded pipe | Sweden, Colombia, Malaysia, China |
| 2 Inch 321H Stainless Steel Pipe for Heat Resistant | Russia, Malaysia, Dubai, Netherlands |
| 321 Stainless Steel Rectangular Tubing DN6 - DN300 | South Korea, NY 12203 (USA), Singapore, Malaysia |
›Dimensions & Weight
Weight Chart of EN 1.4541 Welded Pipe/ Tube
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| PIPE SIZE | OD IN INCHES | A.S.A. Pipe Schedules | A.S.A. Pipe Schedules_2 | A.S.A. Pipe Schedules_3 | A.S.A. Pipe Schedules_4 | A.S.A. Pipe Schedules_5 | A.S.A. Pipe Schedules_6 | A.S.A. Pipe Schedules_7 | A.S.A. Pipe Schedules_8 | A.S.A. Pipe Schedules_9 | A.S.A. Pipe Schedules_10 | A.S.A. Pipe Schedules_11 | A.S.A. Pipe Schedules_12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PIPE SIZE | OD IN INCHES | 5s | 5 | 10s | 10 | 40s & Std. | 40 | 60 | 80s & E.H. | 80 | 120 | 160 | DBL E.H. |
| 1/8 | .405 | .035.1383 | .049.1863 | .049.1863 | .068.2447 | 068.2447 | 0.95.3145 | 0.95.3145 | |||||
| 1/4 | .540 | .049.2570 | .065.3297 | .065.3297 | .088.4248 | 088.4248 | .119.5351 | .119.5351 | |||||
| 3/8 | .675 | .049.3276 | .065.4235 | .065.4235 | .091.5676 | .091.5676 | .126.7338 | .126.7338 | |||||
| 1/2 | .840 | .065.5383 | .065.5383 | .083.6710 | .083.6710 | .109.8510 | .109.8510 | .1471.088 | .1471.088 | .1871.304 | .2941.714 | ||
| 3/4 | 1.050 | .065.6838 | .065.6838 | .083.8572 | .083.8572 | .1131.131 | .1131.131 | .1541.474 | .1541.474 | .2181.937 | .3082.441 | ||
| 1 | 1.315 | .065.8678 | .065.8678 | .1091.404 | .1091.404 | .1331.679 | .1331.679 | .1792.172 | .1792.172 | .2502.844 | .3583.659 | ||
| 1-1/4 | 1.660 | .0651.107 | .0651.107 | .1091.806 | .1091.806 | .1402.273 | .1402.273 | .1912.997 | .1912.997 | .2503.765 | .3825.214 | ||
| 1-1/2 | 1.900 | .0651.274 | .0651.274 | .1092.085 | .1092.085 | .1452.718 | .1452.718 | .2003.631 | .2003.631 | .2814.859 | .4006.408 | ||
| 2 | 2.375 | .0651.604 | .0651.604 | .1092.638 | .1092.638 | .1543.653 | .1543.653 | .2185.022 | .2185.022 | .3437.444 | .4369.029 | ||
| 2-1/2 | 2.875 | .0832.475 | .0832.475 | .1203.531 | .1203.531 | .2035.793 | .2035.793 | .2767.661 | .2767.661 | .37510.01 | .55213.70 | ||
| 3 | 3.500 | .0833.029 | .0833.029 | .1204.332 | .1204.332 | .2167.576 | .2167.576 | .30010.25 | .30010.25 | .43714.32 | .60018.58 | ||
| 3-1/2 | 4.000 | .0833.472 | .0833.472 | .1204.973 | .1204.973 | .2269.109 | .2269.109 | .31812.51 | .31812.51 | .63622.85 | |||
| 4 | 4.500 | .0833.915 | .0833.915 | .1205.613 | .1205.613 | .23710.79 | .23710.79 | .28112.66 | .33714.98 | .33714.98 | .43719.01 | .53122.51 | .67427.54 |
| 4-1/2 | 5.000 | .24712.53 | .35517.61 | .71032.53 | |||||||||
| 5 | 5.563 | .1096.349 | .1096.349 | .1347.770 | .1347.770 | .25814.62 | .25814.62 | .37520.78 | .37520.78 | .50027.04 | .62532.96 | .75038.55 | |
| 6 | 6.625 | .1097.585 | .1097.585 | .1349.290 | .1349.290 | .28018.97 | .28018.97 | .43228.57 | .43228.57 | .56236.39 | .71845.30 | .86453.16 | |
| 7 | 7.625 | .30123.57 | .50038.05 | .87563.08 | |||||||||
| Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds |
Dimension Table of AISI 321H Tube
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| Nominal | O.D. Inches | 10s | 10 | 40s & Std | 40 | 80s & E.H. | 80 | 160 |
|---|---|---|---|---|---|---|---|---|
| 1/8 | .405 | .049 | .049 | .068 | .068 | .095 | .095 | |
| 1/4 | .540 | .065 | .065 | .088 | .088 | .119 | .119 | |
| 3/8 | .675 | .065 | .065 | .091 | .091 | .126 | .126 | |
| 1/2 | .840 | .083 | .083 | .109 | .109 | .147 | .147 | .187 |
| 3/4 | 1.050 | .083 | .083 | .113 | .113 | .154 | .154 | .218 |
| 1 | 1.315 | .109 | .109 | .133 | .133 | .179 | .179 | .250 |
| 1 1/4 | 1.660 | .109 | .109 | .140 | .140 | .191 | .191 | .250 |
| 1 1/2 | 1.900 | .109 | .109 | .145 | .145 | .200 | .200 | .281 |
| 2 | 2.375 | .109 | .109 | .154 | .154 | .218 | .218 | .343 |
| 2 1/2 | 2.875 | .120 | .120 | .203 | .203 | .276 | .276 | .375 |
| 3 | 3.500 | .120 | .120 | .216 | .216 | .300 | .300 | .437 |
| 3 1/2 | 4.000 | .120 | .120 | .226 | .226 | .318 | .318 | |
| 4 | 4.500 | .120 | .120 | .237 | .237 | .337 | .337 | .531 |
| 4 1/2 | 5.000 | .247 | .355 | |||||
| 5 | 5.563 | .134 | .134 | .258 | .258 | .375 | .375 | .625 |
| 6 | 6.625 | .134 | .134 | .280 | .280 | .432 | .432 | .718 |
| 7 | 7.625 | .301 | .500 | |||||
| 8 | 8.625 | .148 | .148 | .322 | .322 | .500 | .500 | .906 |
| 9 | 9.625 | .342 | .500 | |||||
| 10 | 10.750 | .165 | .165 | .365 | .365 | .500 | .593 | 1.125 |
| 11 | 11.750 | .375 | .500 | |||||
| 12 | 12.750 | .180 | .180 | .375 | .406 | .500 | .687 | 1.312 |
| 14 | 14.000 | .188 | .250 | .375 | .437 | .500 | .750 | 1.406 |
| 16 | 16.000 | .188 | .250 | .375 | .500 | .500 | .843 | 1.593 |
| 18 | 18.000 | .188 | .250 | .375 | .562 | .500 | .937 | 1.781 |
›Pressure Ratings
Pressure Rating of 321 stainless steel Tube/ Pipe
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| OD inches | Ave. Wall inches | Min Yield Strength (PSI) | Min Tensile Strength (PSI) | Theoretical Burst Pressure * (PSI) | Working Pressure (PSI) 25% of Burst | Theoretical Yield Point ** (PSI) | Collapse Pressure *** (PSI) |
|---|---|---|---|---|---|---|---|
| 0.250 | 0.020 | 30,000 | 75,000 | 14,286 | 3,571 | 5,714 | 4,416 |
| 0.250 | 0.028 | 30,000 | 75,000 | 21,649 | 5,412 | 8,660 | 5,967 |
| 0.250 | 0.035 | 30,000 | 75,000 | 29,167 | 7,292 | 11,667 | 7,224 |
| 0.250 | 0.049 | 30,000 | 75,000 | 48,355 | 12,089 | 19,342 | 9,455 |
| 0.250 | 0.065 | 30,000 | 75,000 | 81,250 | 20,313 | 32,500 | 11,544 |
| 0.375 | 0.020 | 30,000 | 75,000 | 8,955 | 2,239 | 3,582 | 3,029 |
| 0.375 | 0.028 | 30,000 | 75,000 | 13,166 | 3,292 | 5,266 | 4,145 |
| 0.375 | 0.035 | 30,000 | 75,000 | 17,213 | 4,303 | 6,885 | 5,077 |
| 0.375 | 0.049 | 30,000 | 75,000 | 26,534 | 6,634 | 10,614 | 6,816 |
| 0.375 | 0.065 | 30,000 | 75,000 | 39,796 | 9,949 | 15,918 | 8,597 |
| 0.500 | 0.020 | 30,000 | 75,000 | 6,522 | 1,630 | 2,609 | 2,316L |
| 0.500 | 0.028 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.500 | 0.035 | 30,000 | 75,000 | 12,209 | 3,052 | 4,884 | 3,906 |
| 0.500 | 0.049 | 30,000 | 75,000 | 18,284 | 4,571 | 7,313 | 5,316L |
| 0.500 | 0.065 | 30,000 | 75,000 | 26,351 | 6,588 | 10,541 | 6,786 |
| 0.500 | 0.083 | 30,000 | 75,000 | 37,275 | 9,319 | 14,910 | 8,307 |
| 0.625 | 0.020 | 30,000 | 75,000 | 5,128 | 1,282 | 2,051 | 1,859 |
| 0.625 | 0.028 | 30,000 | 75,000 | 7,381 | 1,845 | 2,953 | 2,568 |
| 0.625 | 0.035 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.625 | 0.049 | 30,000 | 75,000 | 13,947 | 3,487 | 5,579 | 4,335 |
| 0.625 | 0.065 | 30,000 | 75,000 | 19,697 | 4,924 | 7,879 | 5,591 |
| 0.625 | 0.083 | 30,000 | 75,000 | 27,124 | 6,781 | 10,850 | 6,910 |
| 0.625 | 0.095 | 30,000 | 75,000 | 32,759 | 8,190 | 13,103 | 7,734 |
| 0.625 | 0.109 | 30,000 | 75,000 | 40,172 | 10,043 | 16,069 | 8,639 |
| 0.750 | 0.028 | 30,000 | 75,000 | 6,052 | 1,513 | 2,421 | 2,156 |
| 0.750 | 0.035 | 30,000 | 75,000 | 7,721 | 1,930 | 3,088 | 2,669 |
| 0.750 | 0.049 | 30,000 | 75,000 | 11,273 | 2,818 | 4,509 | 3,664 |
| 0.750 | 0.065 | 30,000 | 75,000 | 15,726 | 3,931 | 6,290 | 4,749 |
| 0.750 | 0.083 | 30,000 | 75,000 | 21,318 | 5,330 | 8,527 | 5,905 |
| 0.750 | 0.095 | 30,000 | 75,000 | 25,446 | 6,362 | 10,179 | 6,637 |
| 0.750 | 0.109 | 30,000 | 75,000 | 30,733 | 7,683 | 12,293 | 7,453 |
| 0.750 | 0.120 | 30,000 | 75,000 | 35,294 | 8,824 | 14,118 | 8,064 |
| 0.875 | 0.020 | 30,000 | 75,000 | 3,593 | 898 | 1,437 | 1,340 |
| 0.875 | 0.028 | 30,000 | 75,000 | 5,128 | 1,282 | 2,051 | 1,859 |
| 0.875 | 0.035 | 30,000 | 75,000 | 6,522 | 1,630 | 2,609 | 2,316L |
| 0.875 | 0.049 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.875 | 0.065 | 30,000 | 75,000 | 13,087 | 3,272 | 5,235 | 4,126 |
| 0.875 | 0.083 | 30,000 | 75,000 | 17,560 | 4,390 | 7,024 | 5,152 |
| 0.875 | 0.095 | 30,000 | 75,000 | 20,803 | 5,201 | 8,321 | 5,807 |
| 0.875 | 0.109 | 30,000 | 75,000 | 24,886 | 6,221 | 9,954 | 6,543 |
| 0.875 | 0.120 | 30,000 | 75,000 | 28,346 | 7,087 | 11,339 | 7,100 |
| 1.000 | 0.028 | 30,000 | 75,000 | 4,449 | 1,112 | 1,780 | 1,633 |
| 1.000 | 0.035 | 30,000 | 75,000 | 5,645 | 1,411 | 2,258 | 2,027 |
| 1.000 | 0.049 | 30,000 | 75,000 | 8,149 | 2,037 | 3,259 | 2,796 |
| 1.000 | 0.065 | 30,000 | 75,000 | 11,207 | 2,802 | 4,483 | 3,647 |
| 1.000 | 0.083 | 30,000 | 75,000 | 14,928 | 3,732 | 5,971 | 4,567 |
| 1.000 | 0.095 | 30,000 | 75,000 | 17,593 | 4,398 | 7,037 | 5,159 |
| 1.000 | 0.109 | 30,000 | 75,000 | 20,908 | 5,227 | 8,363 | 5,827 |
| 1.000 | 0.120 | 30,000 | 75,000 | 23,684 | 5,921 | 9,474 | 6,336 |
| 1.000 | 0.134 | 30,000 | 75,000 | 27,459 | 6,865 | 10,984 | 6,963 |
| 1.250 | 0.035 | 30,000 | 75,000 | 4,449 | 1,112 | 1,780 | 1,633 |
| 1.250 | 0.049 | 30,000 | 75,000 | 6,380 | 1,595 | 2,552 | 2,260 |
| 1.250 | 0.065 | 30,000 | 75,000 | 8,705 | 2,176 | 3,482 | 2,958 |
| 1.250 | 0.083 | 30,000 | 75,000 | 11,485 | 2,871 | 4,594 | 3,719 |
| 1.250 | 0.095 | 30,000 | 75,000 | 13,443 | 3,361 | 5,377 | 4,213 |
| 1.250 | 0.109 | 30,000 | 75,000 | 15,843 | 3,961 | 6,337 | 4,776 |
| 1.250 | 0.120 | 30,000 | 75,000 | 17,822 | 4,455 | 7,129 | 5,207 |
| 1.250 | 0.134 | 30,000 | 75,000 | 20,468 | 5,117 | 8,187 | 5,742 |
| 1.500 | 0.035 | 30,000 | 75,000 | 3,671 | 918 | 1,469 | 1,367 |
| 1.500 | 0.049 | 30,000 | 75,000 | 5,243 | 1,311 | 2,097 | 1,896 |
| 1.500 | 0.065 | 30,000 | 75,000 | 7,117 | 1,779 | 2,847 | 2,487 |
| 1.500 | 0.083 | 30,000 | 75,000 | 9,333 | 2,333 | 3,733 | 3,136 |
| 1.500 | 0.095 | 30,000 | 75,000 | 10,878 | 2,719 | 4,351 | 3,559 |
| 1.500 | 0.109 | 30,000 | 75,000 | 12,754 | 3,188 | 5,101 | 4,043 |
| 1.500 | 0.120 | 30,000 | 75,000 | 14,286 | 3,571 | 5,714 | 4,416 |
| 1.500 | 0.134 | 30,000 | 75,000 | 16,315 | 4,079 | 6,526 | 4,881 |
| 1.500 | 0.148 | 30,000 | 75,000 | 18,439 | 4,610 | 7,375 | 5,336 |
| 1.750 | 0.035 | 30,000 | 75,000 | 3,125 | 781 | 1,250 | 1,176 |
| 1.750 | 0.049 | 30,000 | 75,000 | 3,864 | 966 | 1,546 | 1,434 |
| 1.750 | 0.065 | 30,000 | 75,000 | 6,019 | 1,505 | 2,407 | 2,146 |
| 1.750 | 0.083 | 30,000 | 75,000 | 7,860 | 1,965 | 3,144 | 2,711 |
| 1.750 | 0.095 | 30,000 | 75,000 | 9,135 | 2,284 | 3,654 | 3,080 |
| 1.750 | 0.109 | 30,000 | 75,000 | 10,672 | 2,668 | 4,269 | 3,504 |
| 1.750 | 0.120 | 30,000 | 75,000 | 11,921 | 2,980 | 4,768 | 3,832 |
| 1.750 | 0.134 | 30,000 | 75,000 | 13,563 | 3,391 | 5,425 | 4,242 |
| 1.750 | 0.148 | 30,000 | 75,000 | 15,268 | 3,817 | 6,107 | 4,645 |
| 1.750 | 0.165 | 30,000 | 75,000 | 17,430 | 4,357 | 6,972 | 5,124 |
| 2.000 | 0.035 | 30,000 | 75,000 | 2,720 | 680 | 1,088 | 1,032 |
| 2.000 | 0.049 | 30,000 | 75,000 | 3,864 | 966 | 1,546 | 1,434 |
| 2.000 | 0.065 | 30,000 | 75,000 | 5,214 | 1,303 | 2,086 | 1,887 |
| 2.000 | 0.083 | 30,000 | 75,000 | 6,788 | 1,697 | 2,715 | 2,387 |
| 2.000 | 0.095 | 30,000 | 75,000 | 7,873 | 1,968 | 3,149 | 2,715 |
| 2.000 | 0.109 | 30,000 | 75,000 | 9,175 | 2,294 | 3,670 | 3,092 |
| 2.000 | 0.120 | 30,000 | 75,000 | 10,227 | 2,557 | 4,091 | 3,384 |
| 2.000 | 0.134 | 30,000 | 75,000 | 11,605 | 2,901 | 4,642 | 3,751 |
| 2.000 | 0.148 | 30,000 | 75,000 | 13,028 | 3,257 | 5,211 | 4,111 |
| 2.000 | 0.165 | 30,000 | 75,000 | 14,820 | 3,705 | 5,928 | 4,542 |
›Material Properties
UNS S32100 Pipes & Tubes Chemical Properties
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| col_1 | col_2 | col_3 | col_4 | col_5 | col_6 | col_7 | col_8 | col_9 | col_10 |
|---|---|---|---|---|---|---|---|---|---|
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) - 0.70 max |
| SS 321H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 4(C+N) - 0.70 max |
Mechanical Characteristics of AISI 321/ 321H SS Pipe and Tube
| col_1 | col_2 | col_3 | col_4 | col_5 |
|---|---|---|---|---|
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi - 75000 , MPa - 515 | Psi - 30000 , MPa - 205 | 35 % |
›Tolerances
321H SS Seamless Tubes Diameter Tolerance
| col_1 | col_2 | col_3 | col_4 | col_5 |
|---|---|---|---|---|
| NPS | ASTM A312 OD Tolerance | ASTM A312 OD Tolerance | ASTM A312 OD Tolerance | ASTM A312 OD Tolerance |
| NPS | + | + | – | – |
| NPS | inch | mm | inch | mm |
| 1/8~1 1 /2 | 1/64(0.015) | 0.4 | 1/32(0.031) | 0.8 |
| > 1 1 /2~4 | 1/32(0.031) | 0.8 | 1/32(0.031) | 0.8 |
| > 4~8 | 1/16(0.062) | 1.6 | 1/32(0.031) | 0.8 |
| > 8~18 | 3/32(0.093) | 2.4 | 1/32(0.031) | 0.8 |
| > 18~26 | 1/8(0.125) | 3.2 | 1/32(0.031) | 0.8 |
| > 26~34 | 5/32(0.156) | 4 | 1/32(0.031) | 0.8 |
| > 34~48 | 3/16(0.187) | 4.8 | 1/32(0.031) | 0.8 |
Wall Thickness Tolerance of Type 321 Stainless Steel Pipe/ Tubing
| col_1 | col_2 | col_3 |
|---|---|---|
| NPS | ASTM A312 WT Tolerance, % | ASTM A312 WT Tolerance, % |
| NPS | + | – |
| 1/8-2 1 /2 | 20 | 12.5 |
| 3~18, t/D≤ 5% | 22.5 | 12.5 |
| 3~18, t/D> 5% | 15 | 12.5 |
| ≥ 20, welded | 17.5 | 12.5 |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | 12.5 |
| ≥ 20, seamless, t/D> 5% | 15 | 12.5 |

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