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Super Duplex Stainless Steel Pipes A790 S32750 (2507, 1.4410) SA789 S31803(2205,1.4462)

  • Super Duplex Stainless Steel Pipes A790 S32750 (2507, 1.4410) SA789 S31803(2205,1.4462)
Place of Origin CHINA
Brand Name Shangle
Certification PED,IS09001
Model Number 12.7
Minimum Order Quantity Negotiable
Price Negotiable
Packaging Details Woven Packing
Delivery Time 30DAYS
Payment Terms L/C, T/T
Supply Ability 500TONS/30DAYS

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Product Details
Material 304 ,304L 310 321 316 316L Standard AISI, ASTM, DIN, EN, GB
Shape SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80 Technique Cold Draw
Application Oil, Petroleum/Power Package Woven Packing
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A790 S32750 Stainless Steel Pipes

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SA789 S31803 Stainless Steel Pipes

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2507 Super Duplex Pipe
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Product Description

Duplex/Super Duplex Stainless Steel Pipes And Tubes A790 S32750 (2507, 1.4410) , SA789 S31803(2205,1.4462),

 

WenZhou Shangle Steel Co., Ltd: Your premier source for special steel products. Specializing in Austenitic Stainless Steel and top-tier Nickel Alloy steels for over 10 years. Achieve unparalleled results with our seamless and welded pipes and tubes, trusted by a global clientele in 45+ countries. Our adherence to ISO9001 and ISO14001 standards underscores our commitment to special steel quality and excellence. Choose WenZhou Shangle Steel for your definitive steel solutions.
2205 alloy (UNS S31803 and/or S32205) is a nitrogen-enhanced duplex stainless steel alloy. The nitrogen serves to significantly improve the
corrosion resistance of the alloy; especially in the welded condition. Earlier duplex alloys have had moderate resistance to general corrosion
and chloride stress corrosion cracking, but suffered a substantial loss of properties when used in the as-welded condition. To impart the
metallurgical benefits of nitrogen to both improved corrosion performance and as-welded properties, the 2205 alloy is produced to a
0.15% minimum nitrogen content compared to the ASTM range of 0.08-0.20% for S31803 and 0.14-0.20% for S32205. The minimum Cr,
Mo and Ni contents of 2205 alloy (22.0, 3.1 and 5.5% respectively) satisfy the requirements of both the UNS S31803 and S32205
composition specifications. The typical high Cr, Mo and Ni contents of 2205 alloy give it a high PRE N (Pitting Resistance Equivalent) of 35.8,
further enhancing its corrosion resistance. The PRE N of 2205 alloy exceeds those of types 316L and 317L stainless steels.

 

Duplex 2507 is a super duplex stainless steel developed for applications that demand high strength and corrosion resistance. Alloy 2507 has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content causes high resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.

Using Super DuplexUNS S32750 must be restricted to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.
The steel combines high mechanical strength (typically up to 570 MPa yield strength) and good ductility with outstanding corrosion resistance in marine environments. The alloy is supplied with a PREN (Pitting Resistance Equivalent) at >= 40.0 which guarantees high resistance to pitting corrosion. In addition, the steel offers high resistance to crevice corrosion and stress corrosion cracking. Ambient and sub-zero (down to minus 50°C) notch ductility is good.
These attributes mean that this super duplex steel can be used successfully as an alternative to 300 series stainless steel (such as type 316), standard 22% Cr duplex steel (such as UNS S31803 / 1.4462 with PREN 33-34) and precipitation hardening stainless steels (typically 17/4PH).

 

Chemical Composition of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes

Elements C Cr Cu Fe Mo Mn N Ni P S Si W
Minimum   24.0   REMAINDER 3.00   0.24 6.00     0.20 0.50
Maximum 0.030 26 0.50   5.00 1.20 0.32 8.00 0.035 0.020 0.80 1.00

Mechanical Properties of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes

0.2% Proof Stress (N/mm2 ) [ksi] minimum 550[79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum 800 [116]
Elongation (%) minimum 25
ardness (HBN) 270 max
Reduction of Cross Section Area (%) 45
Charpy V-notch Impact at ambient Temp (J) [ft.lb] 80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb] 45av, 35min [33av, 25.8min]
Additional Testing
ASTM G48A Corrosion test at 40°C No pitting and weight loss < 4.0g/m2
Ultrasonic Testing According to ASTM A388
Ferrite Content 35%-55%
Microstructure Microstructure certified free from grain boundary carbides, sigma, chi and laves phases

Alloy Comparison Super Duplex Stainless Steel

Alloy Comparisons S31803 S17400
(17-4PH)		 718( ST) S31254 Alloy 32750
0.2% Proof Strength (N/mm2), minimum 450 1070 550 300 550
Corrosion Rate (mm.y-1) Seawater < 0.01 ~1 < 0.01 < 0.01 < 0.01
Corrosion Rate (mm.y-1)
10% sulphuric acid at 80°C		 < 0.4 10 >1 1.5 < 0.15
Corrosion Rate (mm.y-1)
Boiling 50% nitric acid		 < 0.15 < 0.15 < 0.15 0.4 < 0.15
Wear Properties related to Hardness (HBN) RC25 RC38 RC20 RC20 RC28

Main Features of UNS S32750 Super Duplex Stainless Steel

  • UNS S32750 has excellent corrosion resistance in a wide variety of corrosive chemicals
  • Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C
  • High strength compared to austenitic and 22%Cr duplex stainless steels
  • Excellent ductility and impact strength at both ambient and sub-zero temperatures
  • High resistance to abrasion, erosion and cavitation erosion
  • Excellent resistance to stress corrosion cracking in chloride containing environments
  • UNS S32750 is listed in NACE MR 01 75 for sour service
  • ASME Approval for Pressure Vessel application

Application of ASTM A790 UNS S32750 Super Duplex Stainless Steel Seamless Pipes

  • Chemical Process Industry: Due to its high corrosion resistance UNS S32750 is ideal for use in Nitric Acid Processes, Polypropylene Production, PVC Production, Dioxide, Caustic Evaporators, and Equipment.
  • Handling Organic and Fatty Acids.
  • Marine Industry and Shipbuilding: Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers
  • Oil and Gas Industry: Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea Equipment
  • Pollution Control: Fans and pumps, Wet Scrubbers, Incinerators
  • Pulp and Paper Industry: Black liquor heater tubes, Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching Components
  • Food Industry: Sugar Cane Centrifuges, Corn and Vegetable processing plant
  • Agrochemicals: Fertilizer Production (Wet phosphoric acid)
  • Civil Engineering: Sewage Treatment

 

Tags:

Stainless Steel 2507 Seamless Pipes

1.4410 Seamless Pipes

ASTM A790 UNS S32750 Tube