Like alloy 201, grade 202 stainless steel has a superior toughness property at lower temperatures. Contrary to the Stainless Steel 202 Welded Pipe, conventional stainless steels typically indicate failure by cracking at low temperatures and do not perform well in general. Many 202 Stainless Steel Pipe Manufacturers refer to the alloy as a precipitation hardening grade. The fundamental benefit of precipitation-hardened alloys is that they show an improvement in the steel's tensile strength.
The ASTM A312 UNS S20200 ERW Pipe has qualities like strong corrosion resistance and high toughness in addition to having high hardness and high tensile strength. By utilising typical fusion and resistance procedures, this alloy can be joined together during the welding process. However, the majority of producers advise against producing SS 202 Welded Pipe via oxyacetylene welding. The alloy's chromium concentration, which ranges from 17 to 19 percent, allows the ASME SA312 TP 202 Square Pipe to create a passivating oxide layer, giving it very strong resistance to oxidation-based deterioration.
Similar to grade 304, ASTM A358 tp 202 EFW pipe has insufficient Molybdenum concentration. Grade 304 has a substantially higher nickel concentration than SUS 202 schedule 40 pipe, nevertheless. As a result, the price of the austenitic stainless steel alloy 304 is astronomically more than the price of rectangular pipes of grade DIN 1.4373.
| Sizes: | 1/8" to 24" |
| ASTM A312 Steel grades: | TP304/304L/304H |
| ASTM A312 Schedules: | STD, XS, XXS, SCH5S, SCH10/10S, SCH20, SCH30, SCH40/40S, SCH60, SCH80/80S, SCH100, SCH120, SCH140, SCH160 |
| Standards: | ASTM A312, ASME SA312 |
| Lengths: | SRL and DRL 5meters up to 11meters available from Stock or Production. |
| Ends: | Plain/Bevelled |
| PIPE SIZE |
OD IN INCHES |
A.S.A. Pipe Schedules | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5s | 5 | 10s | 10 | 20 | 30 | 40s & Sth. |
40 | 60 | 80s & E.H. |
80 | 100 | 120 | 140 | 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 |
.147 1.088 |
.147 1.088 |
.187 1.304 |
.294 1.714 |
||||||
| 3/4 | 1.050 | .065 .6838 |
.065 .6838 |
.083 .8572 |
.083 .8572 |
.113 1.131 |
.113 1.131 |
.154 1.474 |
.154 1.474 |
.218 1.937 |
.308 2.441 |
||||||
| 1 | 1.315 | .065 .8678 |
.065 .8678 |
.109 1.404 |
.109 1.404 |
.133 1.679 |
.133 1.679 |
.179 2.172 |
.179 2.172 |
.250 2.844 |
.358 3.659 |
||||||
| 1-1/4 | 1.660 | .065 1.107 |
.065 1.107 |
.109 1.806 |
.109 1.806 |
.140 2.273 |
.140 2.273 |
.191 2.997 |
.191 2.997 |
.250 3.765 |
.382 5.214 |
||||||
| 1-1/2 | 1.900 | .065 1.274 |
.065 1.274 |
.109 2.085 |
.109 2.085 |
.145 2.718 |
.145 2.718 |
.200 3.631 |
.200 3.631 |
.281 4.859 |
.400 6.408 |
||||||
| 2 | 2.375 | .065 1.604 |
.065 1.604 |
.109 2.638 |
.109 2.638 |
.154 3.653 |
.154 3.653 |
.218 5.022 |
.218 5.022 |
.343 7.444 |
.436 9.029 |
||||||
| 2-1/2 | 2.875 | .083 2.475 |
.083 2.475 |
.120 3.531 |
.120 3.531 |
.203 5.793 |
.203 5.793 |
.276 7.661 |
.276 7.661 |
.375 10.01 |
.552 13.70 |
||||||
| 3 | 3.500 | .083 3.029 |
.083 3.029 |
.120 4.332 |
.120 4.332 |
.216 7.576 |
.216 7.576 |
.300 10.25 |
.300 10.25 |
.437 14.32 |
.600 18.58 |
||||||
| 3-1/2 | 4.000 | .083 3.472 |
.083 3.472 |
.120 4.973 |
.120 4.973 |
.226 9.109 |
.226 9.109 |
.318 12.51 |
.318 12.51 |
.636 22.85 |
|||||||
| 4 | 4.500 | .083 3.915 |
.083 3.915 |
.120 5.613 |
.120 5.613 |
.237 10.79 |
.237 10.79 |
.281 12.66 |
.337 14.98 |
.337 14.98 |
.437 19.01 |
.531 22.51 |
.674 27.54 |
||||
| 4-1/2 | 5.000 | .247 12.53 |
.355 17.61 |
.710 32.53 |
|||||||||||||
| 5 | 5.563 | .109 6.349 |
.109 6.349 |
.134 7.770 |
.134 7.770 |
.258 14.62 |
.258 14.62 |
.375 20.78 |
.375 20.78 |
.500 27.04 |
.625 32.96 |
.750 38.55 |
|||||
| 6 | 6.625 | .109 7.585 |
.109 7.585 |
.134 9.290 |
.134 9.290 |
.280 18.97 |
.280 18.97 |
.432 28.57 |
.432 28.57 |
.562 36.39 |
.718 45.30 |
.864 53.16 |
|||||
| 7 | 7.625 | .301 23.57 |
.500 38.05 |
.875 63.08 |
|||||||||||||
| Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds |
|||||||||||||||||
| NPS | OD | SCH 5S | SCH 10S | SCH 40S | SCH 80S |
|---|---|---|---|---|---|
| 1/4 | 13.72 | – | 1.65 | 2.24 | 3.02 |
| 3/8 | 17.15 | – | 1.65 | 2.31 | 3.2 |
| 1/2 | 21.34 | 1.65 | 2.11 | 2.77 | 3.73 |
| 3/4 | 26.67 | 1.65 | 2.11 | 2.87 | 3.91 |
| 1 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 1.25 | 42.16 | 1.65 | 2.77 | 3.56 | 4.85 |
| 1.5 | 48.26 | 1.65 | 2.77 | 3.68 | 5.08 |
| 2 | 60.33 | 1.65 | 2.77 | 3.91 | 5.54 |
| 2.5 | 73.03 | 2.11 | 3.05 | 5.16 | 7.01 |
| 3 | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 3.5 | 101.6 | 2.11 | 3.05 | 5.74 | 8.08 |
| 4 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 5 | 141.3 | 2.77 | 3.4 | 6.55 | 9.53 |
| 6 | 168.28 | 2.77 | 3.4 | 7.11 | 10.97 |
| 8 | 219.08 | 2.77 | 3.76 | 8.18 | 12.7 |
| 10 | 273.05 | 3.4 | 4.19 | 9.27 | 12.7 |
| 12 | 323.85 | 3.96 | 4.57 | 9.53 | 12.7 |
| 14 | 355.6 | 3.96 | 4.78 | 9.53 | 12.7 |
| 16 | 406.4 | 4.19 | 4.78 | 9.53 | 12.7 |
| 18 | 457.2 | 4.19 | 4.78 | 9.53 | 12.7 |
| 20 | 508 | 4.78 | 5.54 | 9.53 | 12.7 |
| 22 | 558.8 | 4.78 | 5.54 | – | – |
| 24 | 609.6 | 5.54 | 6.35 | 9.53 | 12.7 |
| 26 | 660.4 | – | – | – | – |
| 28 | 711.2 | – | – | – | – |
| 30 | 762 | 6.35 | 7.92 | – | – |
| Element | Content (%) |
|---|---|
| Iron, Fe | 68 |
| Chromium, Cr | 17- 19 |
| Manganese, Mn | 7.50-10 |
| Nickel, Ni | 4-6 |
| Silicon, Si | ≤ 1 |
| Nitrogen, N | ≤ 0.25 |
| Carbon, C | ≤ 0.15 |
| Phosphorous, P | ≤ 0.060 |
| Sulfur, S | ≤ 0.030 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 515 MPa | 74694 psi |
| Yield strength | 275 MPa | 39900 psi |
| Elastic modulus | 207 GPa | 30000 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break | 40% | 40% |
|
Physical Property
|
Value
|
|---|---|
|
Density
|
7.80 g/cm³
|
|
Thermal Expansion
|
17 x10^-6 /K
|
|
Modulus of Elasticity
|
200 GPa
|
|
Thermal Conductivity
|
15 W/m.K
|
| NPS | ASTM A312 TP202 OD Tolerance | |||
|---|---|---|---|---|
| + | – | |||
| inch | mm | inch | mm | |
| 1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 |
1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) |
0.4 0.8 1.6 2.4 3.2 4.0 4.8 |
1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) |
0.8 0.8 0.8 0.8 0.8 0.8 0.8 |
| NPS | ASTM A312 TP 202 WT Tolerance, % | |
|---|---|---|
| + | – | |
| 1/8-2 1 /2 | 20.0 | 12.5 |
| 3~18, t/D≤ 5% | 22.5 | 12.5 |
| 3~18, t/D> 5% | 15.0 | 12.5 |
| ≥ 20, welded | 17.5 | 12.5 |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | 12.5 |
| ≥ 20, seamless, t/D> 5% | 15.0 | 12.5 |
