ASTM A789 Round Duplex Stainless Steel Tube Max Length 12000MM 5/8xBWG18
Stainless Steel Super Duplex 2507 Stainless Steel Tube ASTM A789 5/8xBWG18
Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment.
Duplex Stainless Steels, also referred to as austeniticferritic stainless steels, are a family of grades having around equal proportions of austenite and ferrite.
These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking.
Duplex steels offer high resistance to uniform and local corrosion because of their high content of nitrogen, chromium and molybdenum. Duplex stainless steels have good weldability.
Standards
- ASTM/ASME A240 - Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
- EURONORM 1.4410 - X2 Cr Ni MoN 25.7.4
- AFNOR Z3 CN 25.06 Az
S32750 or Duplex 2507
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 Duplex 2507 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.
Duplex 2507 has good mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting weight savings can considerably reduce the overall cost of fabrication.
Specifications:
S32750 Standard Specification:
| Standard | ASTM A789, ASME SA789 |
| Equivalent Standards | DIN 17458, GOST 9941-81, GOST 9940-81, EN 10216-5, ASTM A790, ASME SA790, DIN 17456 |
| Material | S32750 |
| Equivalent Materials | X2CrNiMoN25-7-4, 1.4410, SAF2507, F53 |
| Related Products | stainless steel tube, stainless steel pipe, heat exchanger steel tube, ASTM A789 |
Features
- High resistance to chloride stress corrosion cracking
- Chloride pitting and crevice corrosion resistance superior to 317L stainless
- Good general corrosion resistance
- High strength
- Good sulfide stress corrosion resistance
- Useful up to 600°F
Applications
- Chemical process vessels, piping, and heat exchangers
- FGD scrubber systems
- Pulp mill digesters, bleach washers, chip presteaming vessels
- Food process equipment
- Oil field piping, heat exchangers
ASTM A789 S32750 (SAF2507) Stainless Steel Tubes Chemical Composition
| C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | N % | Cu % |
| 0.03 max | 0.8 max | 1.2 max | 0.035 max | 0.02 max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.50 max |
ASTM A789 S32750(SAF2507) Stainless Steel Pipe Mechanical Properties
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 800 min | 550 min | 15 min | 310 max |
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