Phone
+86-731-82250427
Address
25th floor, C3 Building, Wanda Plaza, Kaifu District, Changsha, Hunan Province, China.
Duplex stainless steel pipe (DSS) is featured with the structure of two phases (α and γ) and has characteristics of both ferritic and austenitic stainless steel. It has good corrosion resistance and high strength. It is alloyed with 18%-28% Cr and 3%-10% Ni in the condition of low C.
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Austenitic-Ferritic Duplex Grade Stainless Steel Seamless Pipe |
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| Material: | S31803(2205), S32750(2507), 254smo(31254), 904L Etc |
| Standard: | GB/T21833-2008 |
| OD: | 8mm~426mm |
| WT: | 1mm~75mm |
| Length: | 3000mm-12000mm |
| Surface: | Annealed, Brightly Annealed, Polish |
| Application: | For High-pressure vessel, Petroleum exploitation, Chemical industry, Shipbuilding |
| Technique: | Hot Rolled (W-H), Cold Drawn (W-C) |
| Test and Inspection: | Tension Test, Flaring Test, Flange Test, Reverse Test, Hardness Test, Hydrostatic or Nondestructive Electric Test, etc |
| Chemical Composition | ||||||||||
| Steel Grade | C, max | Mn, max | Si, max | S, max | P, max | Cr, max | Ni | Mo | N | Cu |
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S32750(SAF2507) 00Cr25Ni7Mo4N |
0.03 | 1.20 | 0.8 | 0.02 | 0.035 | 24.0/26.0 | 6.0/8.0 | 3.0/5.0 | 0.24/0.32 | 0.50 |
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S31803(SAF2205) 00Cr22Ni5Mo3N |
0.03 | 2.00 | 1.0 | 0.02 | 0.030 | 21.0/23.0 | 4.5/6.5 | 2.5/3.5 | 0.08/0.20 | |
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S31500(3RE60) 00Cr18Ni5Mo3Siz |
0.03 | 1.2/2.0 | 1.4/2.0 | 0.03 | 0.030 | 18.0/19.0 | 4.25/5.25 | 2.5/3.0 | 0.05/0.10 | |
| Mechanical Properties | ||||||||||
| Steel Grade | σb(Mpa)≥ | σs(Mpa)≥ | δ(%)≥ | Hardness | ||||||
| HB | HRC | |||||||||
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S32750(SAF2507) 00Cr25Ni7Mo4N |
800 | 550 | 15 | 310 | 32 | |||||
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S31803(SAF2205) 00Cr22Ni5Mo3N |
620 | 450 | 25 | 290 | 30.5 | |||||
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S31500(3RE60) 00Cr18Ni5Mo3Siz |
630 | 440 | 30 | 290 | 30.5 | |||||
Ferritic Duplex Seamless Pipe Processing:
Incoming Raw Material Inspection
Raw Material Segregation to avoid steel grade mix-up
Heating and Hammering End for Cold Drawing
Cold Drawing and Cold Rolling, on line inspection
Heat Treatment, +A, +SRA, +LC, +N, Q+T
Straightening-Cutting to specified length-Finished Measuring Inspection
Mechanical testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
Packing and Stocking
• Heat Exchangers
• Boilers
• Condensers
• Chemical and Petrochemical
• Fertilizer Industry
