JIANGSU MITTEL STEEL INDUSTRIAL LIMITED |
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Standards
ASTM/ASME:A240 - UNS S32750
EURONORM:1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR:Z3 CN 25.06 Az
DIN/EN 1.4410,ASME SA-240
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.
1. Products Details
Mittel inventory now includes Duplex 2507, which is a super
duplex stainless steel with 25% chromium, 4% molybdenum, and 7%
nickel. This alloy is designed for applications which require
exceptional strength and corrosion resistance; examples include
applications in chemical processing, 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.
Chemical Properties
C | Cr | Ni | Mo | N | Others |
---|---|---|---|---|---|
0.020 | 25 | 7 | 4.0 | .27 | S=0.001 |
Mechanical Properties
1. 2507 duplex stainless steel pipe mechanical properties at room
temperature
Pipe:thickness≤20mm ;δb/MPa:800-1000 ,δ0.2/MPa:≥550 ,δ5/%:≥25
,(HV):290
2. 2507 duplex stainless steel plate in the mechanical properties
of room temperature of -200 ℃ :
/℃ δb/MPa
Room Temperature ≥530
Sheet 100 ≥450
200 ≥400
3. Mechanical properties of 2507 large-diameter seamless tube
Dia*thickness δb/MPa δ0.2/MPa δ5/% (HV)
273.0mm×4.19mm 894 644 40 284
323.9mm×4.57mm 858 662 45 270
406.4mm×4.74mm 854 657 41 272
2. Processing
Hot forming
2507 should be hot worked between 1875°F and 2250°F. This should be
followed by a solution anneal at 1925°F minimum and a rapid air or
water quench.
Cold Forming
Most of the common stainless steel forming methods can be used for
cold working 2507. The alloy has a higher yield strength and lower
ductility than the austenitic steels so fabricators may find that
higher forming forces, increased radius of bending, and increased
allowance for springback are necessary. Deep drawing, stretch
forming, and similar processes are more difficult to perform on
2507 than on an austenitic stainless steel. When forming requires
more than 10% cold deformation, a solution anneal and quench are
recommended.
Heat Treatment
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.
Welding
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.
3. Payment ,Shipping
MOQ | 1 Ton |
Price Term | FOB |
Payment | L/C at sight or 30% TT as deposit |
Delivery Time | 20-30 days after receiving deposit by T/T or L/C. |
Sample | Samples free and express charges bear by you |
Shipping:
Standard export package with water proof paper, and metal pallet,
and angle bar protection, and steel strip or as required
20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high) about 24-26CBM,
23MTS
40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high) about 54CBM,
27MTS
40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high) about 68CBM,
27MTS