Like alloy 201, the toughness property of grade 202 stainless steel is better at lower temperatures. Generally, traditional stainless steels do not perform well at low temperatures, and unlike the Stainless Steel 202 Welded Pipe often exhibits failure by cracking. The alloy is referred to as a precipitation hardening grade by several 202 Stainless Steel Pipe Manufacturers. The main advantage of precipitation-hardened alloys is that they demonstrate an increase in the tensile strength of the steel.
In addition to having both high hardness, and high tensile strength, the ASTM A312 UNS S20200 ERW Pipe possesses properties such as good corrosion resistance and high toughness. The welding process of this alloy is possible by the use of common fusion and resistance techniques. Yet, most manufacturers caution against using the oxyacetylene welding method to manufacture the SS 202 Welded Pipe. Since the content of chromium in the alloy ranges between 17% to 19%, the ASME SA312 TP 202 Square Pipe can form a passivating oxide layer, thereby effectively exhibiting very good resistance to decay via oxidation.
Similar to grade 304, the content of Molybdenum in ASTM A358 tp 202 EFW pipe is lacking. However, the content of nickel in grade 304 is significantly higher than the SUS 202 schedule 40 pipe. Therefore, the cost of the economical austenitic stainless steel alloy 304 is astronomically higher than the grade DIN 1.4373 Rectangular Pipe.
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 & Std. |
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 |