Wenzhou Kaixin Kaixin Metal Co, LTD
What is Duplex2507 stainless steel?
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. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion.
Super Duplex 2507 stainless steel 1.4410 Products Form
- Flanges (Socket Weld, Weld Neck, Threaded, Blind, Orifice, Slip on, Lap Joint)
- Wire
- Bar
- Płyta
- Fittings (returns, blinds, pipe nipples, pipe fittings, caps, tees, weld-necks, stub-ends, elbows, reducers, long welding necks, crosses, tube fittings)
- Arkusz
- Pipe & Tube (welded & seamless)
Applications for DuplexStal nierdzewna 2507
- Oil and gas industry equipment
- Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems
- Chemical process industries, heat exchangers, vessels, and piping
- Desalination plants, high pressure RO-plant and seawater piping
- Mechanical and structural components, high strength, corrosion-resistant parts
- Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping
Equivalents of grade 2507
| UE PL | USA - | Francja AFNOR | Szwecja SS |
| X2CrNiMoN25-7-4 | S32750 | Z3CND25-06Az | 2328 |
Composition ranges for 2507 grade of stainless steel
| 1.4410 Super Duplex Skład chemiczny
KlasaCNMoCrNi1.4410 (S32750 – F53)%0.03 max%0.24 – 0.32%3 – 5%24 – 26%6 – 8 |
Właściwości mechaniczne
| Temper | Annealed | |
| Tensile Rm | 115 | ksi (min) |
| Tensile Rm | 800 | MPa (min) |
| R.p. 0.2% Yield | 80 | ksi (min) |
| R.p. 0.2% Yield | 550 | MPa (min) |
| Elongation (2” or 4D gl) | 15 | % (min) |
Właściwości fizyczne
| Specific Heat (0-100°C) | 500 | J.kg-1.°K-1 |
| Przewodność cieplna | 15 | W.m -1.°K-1 |
| Rozszerzalność cieplna | 11 | mm/m/°C |
| Modulus Elasticity | 200 | GPa |
| Rezystywność elektryczna | 8.12 | μohm/cm |
| Gęstość | 7.8 | g/cm3 |
Odporność na korozję
32750 has excellent general corrosion resistance, superior to virtually all other stainless steels. It has
high resistance to intergranular corrosion and very high resistance to stress corrosion cracking in
both chloride and sulphide environments. It is the grade of choice for severe high temperature
marine environments and for chemical and petrochemical processing, even including some
solutions of strong acids.
Obróbka cieplna
2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 1925°F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.
Hot working
2507 should be hot worked between 1875ºF and 2250ºF. This should be followed by a solution anneal at 1925ºF minimum and a rapid air or water quench.
Cold working
Większość popularnych metod formowania stali nierdzewnej może być stosowana do obróbki na zimno stali 2507. Stop ten ma wyższą granicę plastyczności i niższą ciągliwość niż stale austenityczne, więc producenci mogą stwierdzić, że konieczne są wyższe siły formowania, zwiększony promień gięcia i zwiększony naddatek na sprężynowanie. Głębokie tłoczenie, rozciąganie i podobne procesy są trudniejsze do wykonania na stali 2507 niż na austenitycznej stali nierdzewnej. Gdy formowanie wymaga więcej niż 10% odkształcenia na zimno, zaleca się wyżarzanie i hartowanie w roztworze.
Spawanie
2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.
Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 300°F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.
Key Benefits of Duplex2507 Stainless Steel
Duplex2507 stainless steel offers numerous benefits for industrial applications. Its combination of strength and corrosion resistance is unmatched by many other materials. These properties ensure reliability under challenging conditions.
The alloy’s cost-effectiveness is another advantage. Despite its excellent performance, it is more affordable than many nickel-based alternatives. This makes it an attractive option for budget-conscious projects.
Here are some key benefits of Duplex 2507:
- High strength-to-weight ratio
- Excellent oxidation resistance
- Resistance to fatigue and abrasion
Fabrication and Handling Considerations
Important considerations include:
- Using specific welding techniques
- Controlling heat treatment processes
- Following industry standards
These practices help preserve the steel’s corrosion resistance and mechanical strength. Proper handling ensures durability and performance in demanding applications.
Wnioski
Duplex2507 stainless steel is a remarkable material known for its strength and corrosion resistance. It plays a vital role in challenging environments, offering durability and cost-effectiveness. For engineers and builders, it stands as a reliable choice for various demanding applications.