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Metinox Overseas is a reputed and trusted supplier of Duplex Stainless Steel UNS S32205 Tubes and UNS S31803 Seamless Tubes, designed to be very resistant to chloride-bearing and sulphide stress corrosion cracking. UNS S32205 Seamless Tubes are almost twice as strong as the traditional austenitic stainless steels and hence are applicable in industrial imperative applications.
UNS S32205 Welded and EFW Tubes are to be worked at up to 2010degF/1100degC a maximum temperature, and at 2100 degC / 1150degC. In non-uniform or non-compact components, temperature may also be distributed differently across the component during the forming process, and this will result in edges cooling quicker than the core, and putting the component at risk of cracking in unheated areas. Duplex Steel UNS S32205 ERW Tubes are somewhat harder to machine than 300-series austenitic stainless steels including higher cutting forces are needed and tool wear is more rapid. Likewise, UNS S31803 Seamless Tubes require intensive machining because they are very strong.
The Duplex Stainless Steel UNS S31803 Welded and EFW tubes are offered with a guarantee of corrosion resistance and work effectively in most corrosive applications in general. These grades are usually performing better than Stainless Steel 316 under most of the service conditions and exhibiting good formability when fabricating. Nevertheless, UNS S31803 ERW Tubes are neither expected to work at long service at temperatures above 300degC nor would be expected to operate at temperatures below -50degC because of the ductile to brittle transition behavior. The Duplex 2205 Tubes are two phase stainless steel that has 22 percent chromium, 3 percent molybdenum as well as 5-6 percent nickel that provides a balanced ratio of toughness, strength and corrosion resistance.
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| Parameter | Details |
| Specifications | ASTM A789 / ASME SA789 |
| Dimensions | ASTM, ASME and API. |
| Schedule | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Seamless Tubes Sizes | 1/2" NB - 8" NB |
| Welded Tubes Sizes | 6" NB - 24" NB |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Outer Diameter | 6.0-630mm |
| Thickness | 0.3mm � 50 mm |
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex 2205 | S31803 / S32205 | 1.4462 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 � 23.0 | 3.0 � 3.5 | 4.50 � 6.50 | 0.14 � 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 � 23.0 | 2.50 - 3.50 | 4.50 � 6.50 | 0.8 � 0.20 | 63.54 min |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| Duplex 2205 | 621 | 448 | 25 | 31 | 293 |
| Density lbm/in3 | Electrical Resistivity mW�in | tdermal Conductivity (BTU/hr�ft��F) | Heat Capacity BTU/lbm��F | Electrical Resistivity (in x 10-6) | |
| at 68�F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212�F | 26.1 | 9.2 | 0.119 | 35.4 | |
| at 392�F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572�F | 24.9 | 10.4 | 0.134 | 39.4 |
| Dimensions (mm) | Wall (mm) | Weight per metre (kg) | Dimensions (mm) | Wall (mm) | Weight per metre (kg) |
| 12.7 x 12.7 | 1.20 | 0.44 | 40 x40 | 1.20 | 1.49 |
| 12.7 x 12.7 | 1.50 | 0.55 | 40 x40 | 1.50 | 1.85 |
| 15 x 15 | 1.20 | 0.53 | 40 x40 | 2.00 | 2.45 |
| 15 x 15 | 1.50 | 0.65 | 40 x40 | 3.00 | 3.75 |
| 20 x 20 | 1.20 | 0.71 | 50 x50 | 1.50 | 2.32 |
| 20 x 20 | 1.50 | 0.88 | 50 x50 | 2.00 | 3.08 |
| 20 x 20 | 2.00 | 1.19 | 50 x50 | 3.00 | 4.65 |
| 25 x 25 | 1.20 | 0.92 | 60 x60 | 2.00 | 3.71 |
| 25 x 25 | 1.50 | 1.14 | 60 x60 | 3.00 | 5.49 |
| 25 x 25 | 2.00 | 1.49 | 70 x70 | 3.00 | 6.53 |
| 25 x 25 | 3.00 | 2.20 | 80 x80 | 2.00 | 4.98 |
| 30 x 30 | 1.20 | 1.10 | 80 x80 | 3.00 | 7.53 |
| 30 x 30 | 1.50 | 1.37 | 100 x 100 | 2.00 | 6.40 |
| 30 x 30 | 2.00 | 1.84 | 100 x 100 | 3.00 | 9.53 |
| 30 x 30 | 3.00 | 2.72 |
|
O.D. Inches |
Wall Thickness Inches |
O.D. +/- Inches |
|
1/2" to 1" incl. |
.025 to .065 |
.005 |
|
Over .065 to .134 |
.010 |
|
|
1 to 1-1/2" incl. |
.025 to .065 |
.008 |
|
Over .065 to .134 |
.010 |
|
|
1-1/2" to 2" incl. |
.025 to .049 |
.010 |
|
Over .049 to .083 |
.011 |
|
|
Over .083 to .148 |
.012 |
|
|
2" to 2-1/2" incl. |
.032 to .065 |
.012 |
|
Over .065 to .109 |
.013 |
|
|
Over .109 to .165 |
.014 |
|
|
2-1/2" to 3-1/2" incl. |
.032 to .165 |
.014 |
|
Over .165 to .220 |
.020 |
|
|
3-1/2" to 5" incl. |
.083 to .165 |
.020 |
|
Over .165 to .220 |
.025 |
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