1.4547 Round Bar | Steel grade 1.4547 (UNS S31254 - 254 SMO® - SS2378) in stainless steel
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By using 1.4547 (UNS S31254 – 254 SMO®* – SS2378) you get a high alloyed, stainless steel with outstanding corrosion resistance. The steel is developed for use in halide-containing environment such as seawater. Some common applications are off shore, marine environment and within chemical industry.
1.4547 (also called UNS S31254, 254 SMO®* and SS2378) is a high alloyed austenitic stainless steel with exceptionell corrosion resistance. The steel is developed for use in halide-containing environment such as seawater, hydrochloric acid and contaminated sulphuric acid. 1.4547 has a superior resistance to uniform corrosion compared with common stainless steel, especially in acids containing halides. It has a high content of alloy materials which gives the steel exceptionally good resistance to pitting and crevice corrosion. The steel also have very good resistance to stress corrosion cracking.
Typical application areas for 1.4547:
Good formability and weldability
1.4547 has a good weldability and the methods used for welding conventional austenitic steels are used. It is somewhat more sensitive to hot cracking and shall be welded with low heat input.
Filler metal of type Avesta Welding P12 or P16 are recommended. These filler metals will give a weld with a resistance to pitting corrosion. The steel can be both cold and hot formed. Due to a higher strength and alloy materials the steel is difficult to machine.
Steel grade 1.4547 is a available as machined round bar in dimensions 10 – 320 mm.
If there is something you miss or wonder about you can always contact us to discuss your needs.
Stainless steel 1.4547 / UNS S31254 / F44 / 254 SMO Acier Inoxydable
Rustfrit stål Acciai Inossidabli
Rostfrit stål Acero Inoxidable
| W.Nr. 1.4547 | 254 SMO | SIS 2378 |
| UNS S31254 | AFNOR Z1 CNDU 20.18.06Az | JIS |
| X1CrNiMoCuN20-18-7 | F 44 |
1.4547 is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media. The steel characterized by the following properties: Excellent resistance to pitting and crevice corrosion, High resistance to general corrosion, High resistance to stress corrosion cracking, Higher strength than conventional austenitic stainless steels, Good weldability.
Stock range
1.4547 - UNS S31254 - F44 round bar hotrolled / forged, peeled / turned acc. DIN EN 10060 ( formerly DIN 1013 ), long 4-6 mtr
Sizes:
Ø 12,70 mm - Ø 304, 8 mm
1.4547 - UNS S31254 - F44 Forgings
Forgings acc. to drawings, bars, discs and rings on request.
1.4547 - UNS S31254 - F44 Sheets/Plates hotrolled Finish 1
Sizes:
Thickness 3 mm - 70 mm
Width 1000 / 1250 / 1500 / 2000 / 2500 mm
Length 2000 / 2500 / 3000 / 6000 mm
1.4547 - UNS S31254 - F44 sheets / plates
Plasma cutting
Water-jet cutting
Laser-cutting
Sawn cuttings
Certificates: EN 10204 / 3.1
• The 6 Mo super austenitic steel combines moderate tensile strength and high ductility with excellent corrosion resistance in seawater and variety of industrial environment.
• Typically the alloy has PREN of 42 – 44, which ensure that the resistance to pitting corrosion is high.
• High resistance crevice corrosion.
| WEIGHT% | C | SI | MN | S | P | CR | NI | MO | N | CU |
| MIN. | 19,50 | 17,50 | 6,00 | 0,18 | 0,50 | |||||
| MAX | 0,020 | 0,80 | 1,00 | 0,010 | 0,030 | 20,50 | 18,50 | 6,50 | 0,22 | 1,00 |
• High resistance to general corrosion.
• Typical applications: Pumps, valves, chokes, pipework/flanges and manifolds in oil and gas industry.
| YIELD STRENGTH RP0.2 MPA | TENSILE STRENGTH RM MPA | ELONGATION [%] | HARDNESS [HB] | IMPACT CHARPY-V, -46ºC [J] | PRE | |
| ALL PRODUCTS | ≥ 300 | 650 – 850 | ≥ 35 | ≤ 260 | ≥ 45 | ≥ 40 |
Solution annealing at min 1150°C followed by water quenching
Very good.
| DESCRIPTION | KG/M | DESCRIPTION | KG/M |
| 10 mm | 0.7 | 120 mm | 92.3 |
| 12 mm | 1. | 130 mm | 108.1 |
| 16 mm | 1.7 | 140 mm | 125.4 |
| 20 mm | 2.6 | 150 mm | 144 |
| 25 mm | 4. | 160 mm | 161 |
| 30 mm | 5.8 | 170 mm | 186 |
| 32 mm | 6.6 | 180 mm | 208 |
| 35 mm | 7.9 | 200 mm | 256 |
| 40 mm | 10.3 | 210 mm | 286 |
| 50 mm | 16. | 220 mm | 308 |
| 60 mm | 23. | 230 mm | 343 |
| 65 mm | 27. | 250 mm | 393 |
| 70 mm | 31.2 | 270 mm | 467 |
| 75 mm | 36.1 | 280 mm | 503 |
| 80 mm | 41.2 | 300 mm | 577 |
| 90 mm | 51.9 | 325 mm | 687 |
| 100 mm | 64.1 | 350 mm | 796 |
| 110 mm | 76.1 | 380 mm | 939 |
| 115 mm | 85.9 | 400 mm | 1028 |
| DESCRIPTION | KG/PLATE | DESCRIPTION | KG/PLATE |
| 1 x 1250 x 2500 mm | 25 | 12 x 1500 x 3000 mm | 445 |
| 1,5 x 1500 x 3000 mm | 54 | 12 x 1500 x 6000 mm | 890 |
| 2 x 1500 x 3000 mm | 72 | 12 x 2000 x 6000 mm | 1187 |
| 3 x 1500 x 3000 mm | 108 | 15 x 1500 x 3000 mm | 557 |
| 3 x 1500 x 6000 mm | 216 | 15 x 1500 x 6000 mm | 1113 |
| 3 x 2000 x 6000 mm | 288 | 15 x 2000 x 6000 mm | 1484 |
| 4 x 1500 x 3000 mm | 144 | 20 x 1500 x 3000 mm | 742 |
| 4 x 1500 x 6000 mm | 288 | 20 x 1500 x 6000 mm | 1484 |
| 4 x 2000 x 6000 mm | 384 | 20 x 2000 x 6000 mm | 1978 |
| 5 x 1500 x 3000 mm | 180 | 25 x 1500 x 3000 mm | 927 |
| 5 x 1500 x 6000 mm | 360 | 25 x 1500 x 6000 mm | 1854 |
| 5 x 2000 x 6000 mm | 480 | 25 x 2000 x 6000 mm | 2472 |
| 6 x 1500 x 3000 mm | 216 | 30 x 1500 x 3000 mm | 1113 |
| 6 x 1500 x 6000 mm | 432 | 30 x 1500 x 6000 mm | 2225 |
| 6 x 2000 x 6000 mm | 576 | 30 x 2000 x 6000 mm | 2967 |
| 8 x 1500 x 3000 mm | 297 | 40 x 1500 x 3000 mm | 1484 |
| 8 x 1500 x 6000 mm | 594 | 40 x 1500 x 6000 mm | 2967 |
| 8 x 2000 x 6000 mm | 791 | 40 x 2000 x 6000 mm | 3956 |
| 10 x 1500 x 3000 mm | 371 | 50 x 1500 x 3000 mm | 1854 |
| 10 x 1500 x 6000 mm | 742 | 50 x 1500 x 6000 mm | 3708 |
| 10 x 2000 x 6000 mm | 989 | 50 x 2000 x 6000 mm | 4944 |
|
|
| C | Si | Mn | S | N | Cr | Cu | Mo | Ni | P | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.4547 | Min % | 0,18 | 19,50 | 0,50 | 6,00 | 17,50 | |||||
| Max % | 0,020 | 0,70 | 1,00 | 0,010 | 0,25 | 20,50 | 1,00 | 7,00 | 18,50 | ||
| (Key to steel 2010) | |||||||||||
| S 31254 | Min % | 0,18 | 19,50 | 0,50 | 6,00 | 17,50 | |||||
| Max % | 0,20 | 0,80 | 1,00 | 0,010 | 0,22 | 20,50 | 1,00 | 6,50 | 18,50 | 0,030 | |
| ASTM A 312 (S 31254) | |||||||||||
| Property | Value |
|---|---|
| Density: kg/dm3 | 8,0 |
| Hardness: HB | <= 360 |
| magnetizable | no |
| impact work (ISO-V) (J) | >100 |
| Temperature T °C/F (°C/F) | Specific heat J / kgK (Btu / lb °F) | Thermal conductivity W/mK (Btu·in / ft2·h·°F) | Electric resistance µΩ · cm (Ω circ mill / ft) | Modulus of elasticity kN/mm2 (103 ksi) | Expansion rate from 70°F bis T 10-6 / K (10-6 / °F) |
|---|---|---|---|---|---|
| 20 / 68 | 500 (--) | 13 (--) | 0,85 (--) | ||
| 100 / 212 | 520 (--) | 14 (--) | 0,90 (--) | 16,0 (--) | |
| 200 / 392 | 540 (--) | 15 (--) | 0,95 (--) | 16,0 (--) | |
| 300 / 572 | 555 (--) | 17 (--) | 1,03 (--) | 16,5 (--) | |
| 400 / 752 | 570 (--) | 18 (--) | 1,10 (--) | 17,0 (--) |
| Temperature | 1,0% Yield strength in high temperatures |
|---|---|
| °C / °F | Rp 1,0 |
| N/mm2 / ksi | |
| 100 / 212 | 270 / 39,1 |
| 200 / 392 | 225 / 32,6 |
| 300 / 572 | 200 / 29,0 |
| 400 / 752 | 190 / 27,5 |
| 500 7 932 | 180 / 26,1 |
| ksi value calculated | |
| 1,0 % Yield strength (Mpa) / (ksi) | 340 / 49,3 | ||
|---|---|---|---|
| 0,2 % Yield strength (Mpa) / (ksi) | 300 /43,5 | ||
| Tensile strength Rm (Mpa) /(ksi) | 650-850 / 94-123 | ||
| Elongation A5 (%) | 35 | ||
| impact work ISO-V (J) | 70 | ||
| Application area | ||
|---|---|---|
| Operation temperature | ºF to 752 ºF | operating temperature limit |
| Solution heat treatment | ||
|---|---|---|
| Working temperature | 2102 ºF to 2192 ºF | |
| Explanation report | cool down:water | |
| Solution heat treatment | ||
|---|---|---|
| Working temperature | 1832 ºF to 2102 ºF | |
| Explanation report | cool down: air | |
| Standards | Desciption |
|---|---|
| ASTM A 213 | Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger Tubes |
| ASTM A 312 | Standard Specification for Seamless and welded austenitic stainless steel pipes |
| DIN EN 10088-1 (09/2005) | Stainless steels Part 1: List of stainless steels |
| DIN EN 10088-3 (09/2005) | stainless steels.Technical delivery conditions for semi-finished products,bars,rods,wire selection and bright products of corrosion resisting steels for general and construction purposes |
| DIN EN 10217-7 | Welded steel pipes under compression load Pipes made from stainless steel |
| DIN EN 10297-2 (02/2006) | Welded circular steel pipes for machine construction and general technical service stainless steel. Pipes made from stainless steel |
| VdTÜV / Werkstoffblatt 473 | Austenitic steel X1 CrNiMoCu 20 18 7 |
| Chip removing process | process in annealed state |
|---|
| Welding | |
|---|---|
| - Material classification acc. CEN ISO/TR 15608 | 8.2 |
| - Type | well weldable |
| - Add. material | NiCr20Mo9Nb |
| Details of application | |
|---|---|
| Certifications | |
| Chemical Industry | |
| petrochemical industry | |
| Flue gas desulphurisation plants | |
| cellulose/paper industry | |
| sea and lake water plants |
| Product type | Product |
|---|---|
| Plates / Sheets | plates/sheets plate/sheet cuts |
| Fittings | welded elbows welded reductions Welded T-pieces seamless elbows seamless reductions seamless T-pieces |
| Flanges / Collars / Flared tube ends | weld neck flange/blind flange |
| Pipes / Tubes | welded pipes/tubes seamless pipes/tubes |
| Bar steel | section steel round bar steel |
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