Duplex és superduplex varratmentes csövek
A duplex és szuper duplex acélból készült csövek szakítószilárdsága sokkal nagyobb, mint a hagyományos ausztenites acélokból készült csöveké. A duplex acél legnagyobb hátránya az, hogy az anyagban magasabb hőmérsékleten törékeny fázisok válhatnak ki. Az ilyen megjelenő fázisok negatívan befolyásolják az anyag korrózióállóságát illetve rontja az acél formálhatóságát.
Dimensions - duplex pipe and super duplex pipe:
- diameters from 4,0 mm to 219,0 mm
- walls thickness from 0,3 mm to 12,7 mm
Steel grades - duplex pipe and super duplex pipe:
| X2CrNiMoN22-5-3 | |
| Euro standard: | 1.4462 |
| Standard: | EN 10088 - 2 : 2005 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10088 - 3 : 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| Classification: | Austenitic-ferritic stainless steels - standard grade |
| Steel grade equivalent | USA: S31803 / S32205 France (AFNOR): Z3CND22-05Az Sweden (SS): 2377 Great Britain (BS): 318S13 Russia (GOST): 03KH23N6 Another: SAF2205 |
| C | Si | Mn | Ni | P | S | Cr | Mo | N |
| max 0,03 | max 1,00 | max 2,00 | 4,50-6,50 | max 0,035 | max 0,015 | 21,00-23,00 | 2,30-3,50 | 0,10-0,22 |
| Gatunek: | X2CrNiMoN25-7-4 |
|---|---|
| Euro standard: | 1.4410 |
| Standard: | EN 10088 - 2 : 2005 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10088 - 3 : 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| Classification: | Austenitic-ferritic stainless steels - special grade |
| Steel grade equivalent | USA: S32750 France (AFNOR): Z3CND25-06Az Sweden (SS): 2328 Another: F53 |
Skład chemiczny gatunku X2CrNiMoN25-7-4 (1.4410)
| Si | Mn | P | S | N | Cr | Mo | Ni | |
| max 0,030 | max 1 | max 2 | max 0,035 | max 0,015 | 0,20-0,35 | 24,00-26,00 | 3,00-4,50 | 6,00-8,00 |
| Gatunek: | X2CrNiMoCuWN25-7-4 |
|---|---|
| Euro standard: | 1.4501 |
| Standard: | EN 10088 - 2 : 2005 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10088 - 3 : 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| Classification: | Austenitic-ferritic stainless steels - special grade |
| Steel grade equivalent | USA : S32760 Another: F55 |
| C | Si | Mn | Ni | P | S | Cr | Mo | W | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| max 0,03 | max 1,00 | max 1,00 | 6,00-8,00 | max 0,035 | max 0,015 | 24,00-26,00 | 3,00-4,00 | 0,5-1,0 | 0,2-0,3 | 0,5-1,0 |
| Gatunek: | X2CrNiN23-4 |
|---|---|
| Euro standard: | 1.4362 |
| Standard: | EN 10088 - 2 : 2005 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10088 - 3 : 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| Classification: | Austenitic-ferritic stainless steels - standard grade |
| Steel grade equivalent | USA: S32304 France (AFNOR): Z3CN23-04Az Sweden (SS): 2327 Russia (GOST): 03KH23N6 |
| C | Si | Mn | Ni | P | S | Cr | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|
| max 0,03 | max 1,00 | max 2,00 | 3,50-5,50 | max 0,035 | max 0,015 | 22,00-24,00 | 0,10-0,60 | 0,05-0,20 | 0,10-0,60 |
X3CrNiMoN27-5-2 (1.4460)
| Gatunek: | X3CrNiMoN27-5-2 |
|---|---|
| Euro standard: | 1.4460 |
| Standard: | EN 10088 - 3 : 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes |
| Classification: | Austenitic-ferritic stainless steels-standard grades |
| Steel grade equivalent | USA : 329, UNS S32900 |
| C | Si | Mn | P | S | N | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
| max 0,05 | max 1,00 | max 2,00 | max 0,035 | max 0,015 | 0,05-0,20 | 25,00-28,00 | 1,30-2,00 | 4,50-6,50 |
Grades - duplex pipe and super duplex pipe:
1.4462, S31803/S32205, X2CrNiMoN22 5 3, F51-F60, SAF2205
1.4410, S32750, X2CrNiMoN25 7 4, F53, Alloy 2507
1.4501, X2CrNiMoCuWN25 7 4, S32760, F55
and others to be agreed
Norms - duplex tube and super duplex tube:
ASTM A213/A213M, ASME SA213/SA213M
ASTM A312/A312M, ASME SA312/SA312M
ASTM A376/A376M, ASME SA376/SA376M
ASTM A789/A789M, ASME SA789/SA789M
ASTM A790/A790M, ASME SA790/SA790M
DIN 17456, DIN 17458
EN 10216-5
+Vd TUV 418
and others to be agreed
Tolerances - duplex tube and super duplex tube:
EN ISO 1127, DIN 2462
EN 10305-1, DIN 2391
and others to be agreed
Duplex tube:
Duplex pipes in stainless steels have a mixed microstructure of austenite and ferrite, the aim usually being to produce a 50/50 mix, although in commercial alloys the ratio for duplex tubes may be 40/60.
Super duplex tube:
Super duplex is a duplex stainless steel where pitting corrosion equivalent (PRE) > 40, and PRE = %Cr (Chromium) + 3.3x(%Mo Molybdenum + 0.5x% W Wolfram) + 16x%N Nitrogen.
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